ТЕХНОЛОГИИ ПОВТОРИТЕЛЯ ДЛЯ СИСТЕМЫ С МНОЖЕСТВОМ ВХОДОВ И МНОЖЕСТВОМ ВЫХОДОВ С ИСПОЛЬЗОВАНИЕМ ФОРМИРОВАТЕЛЕЙ ДИАГРАММЫ НАПРАВЛЕННОСТИ

Изобретение относится к технике связи и может использоваться для сети беспроводной связи. Технический результат состоит в повышении эффективности использования беспроводной связи в домашних условиях или в среде внутри помещений. Для этого повторитель включает в себя первую приемную антенну для приема сигнала приема по первому тракту от одного из точки доступа, другого повторителя или устройства беспроводной станции; вторую приемную антенну для приема сигнала приема по второму тракту; схему взвешивания при приеме для применения первого и второго весовых коэффициентов к сигналу приема для формирования первого взвешенного сигнала приема и второго взвешенного сигнала приема; модуль комбинирования сигналов для комбинирования первого и второго взвешенных сигналов приема согласно различным математическим комбинациям для формирования множества комбинированных сигналов приема; и передающую антенну для передачи сигнала передачи, соответствующего одному из комбинированных сигналов приема, в одно из ...

СВЯЗЬ С МНОЖЕСТВОМ ВХОДОВ И МНОЖЕСТВОМ ВЫХОДОВ (MIMO)

Изобретение относится к технике беспроводной связи и может быть использовано для поддержки связи в системе беспроводной связи с множеством входов и множеством выходов. Способ управления посредством пользовательского устройства множеством потоков беспроводной сети связи с множеством входов и множеством выходов заключается в том, что определяют, является ли объем остаточных данных, имеющихся для передачи, который больше максимальной емкости одного из множества потоков, меньшим пороговой емкости по меньшей мере другого из множества потоков, и если это так, предотвращают передачу по меньшей мере одного из множества потоков. Это помогает гарантировать то, что поток используется для передачи только тогда, когда остаточные данные являются достаточными для оправданности его использования. Технический результат - предотвращение избыточной мощности передачи, высокая степень использования ресурса кода. 3 н. и 13 з.п. ф-лы, 2 табл., 2 ил.

СПОСОБ И УСТРОЙСТВО ДЛЯ ПРЕДОСТАВЛЕНИЯ ОТЧЕТА ПО ИНФОРМАЦИИ О СОСТОЯНИИ КАНАЛА В СИСТЕМЕ СВЯЗИ

Изобретение относится к системам связи. Технический результат заключается в сокращении передачи служебных данных. Предоставлены способ и устройство (800) в оборудовании (420) пользователя для предоставления отчета по Информации о Состоянии Канала, CSI, и способ и устройство (1000) в базовой станции (410) для получения CSI. Оборудование (420) пользователя соединено с базовой станцией (410) в сети (400) сотовой связи. После приема (702) от базовой станции разрешения в субкадре n, подлежащего использованию для предоставления отчета по CSI, оборудование пользователя определяет (703) тип субкадра для субкадра n+p. Затем оборудование пользователя предоставляет (704) базовой станции отчет по CSI, отражающей условия канала в типе субкадра для субкадра n+p. p является переменным значением. 4 н. и 38 з.п. ф-лы, 10 ил.

СОВМЕЩЕННЫЙ КОМПОЗИТНЫЙ КАНАЛЬНЫЙ ФИЛЬТР

Изобретение относится к области беспроводной связи для генерирования цифровых коэффициентов для фильтра. Технический результат: уменьшение деструктивных эффектов рабочей характеристики. Генерирование коэффициентов полагается на преобразование Фурье, выполняемое на импульсной характеристике во временной области, которая дополняется нулями, например, нули добавляются к массиву, соответствующему дискретизированному входному сигналу длиной М. Единичный фильтр-прототип генерируется по характеристике в частотной области длиной NFFT=M+NS-1, в которой NS представляет собой длину дискретизации поступающего сигнала. Затем единичный фильтр-прототип циклически сдвигается, чтобы генерировать полосовой фильтр, центрированный на требуемой частоте. Циклически сдвинутые фильтры добавляются поточечным образом для генерирования совокупности композитных цифровых коэффициентов, чтобы фильтровать поступающий сигнал. Опорные частоты для композитного фильтра извлекаются из сообщения, принимаемого от одной или ...

Антенна и терминал

Антенна, применимая для терминала, содержит: область заземления, первый излучатель, второй излучатель и точку питания, соединенную с первым и со вторым излучателями; при этом область заземления соединена с первым излучателем и со вторым излучателем, соответственно, и на ней имеется точка заземления; между первым и вторым излучателями сформирована щелевая связь; причем первый излучатель имеет диапазон рабочих частот в диапазоне частот 5G, а второй излучатель имеет диапазон рабочих частот в диапазоне частот 4G. В настоящем изобретении первый и второй излучатели интегрированы в одну антенну, чтобы одна антенна поддерживала одновременно и диапазон частот 5G и диапазон частот 4G. 2 н. и 8 з.п. ф-лы, 3 ил.

СИСТЕМА И СПОСОБ ВЫДЕЛЕНИЯ РЕСУРСОВ OFDMA

Изобретение относится к системе беспроводной связи. Технический результат изобретения заключается в повышении производительности оценки канала за счет включения большего количества длинных учебных полей (LTF) в кадр, чем это предусматривает технический стандарт (TS) 802.11ac Института инженеров по электротехнике и радиоэлектронике (IEEE) для количества пространственно-временных потоков. Способ передачи данных в системе беспроводной связи содержит этапы, на которых генерируют первый набор пространственно-временных потоков для первой станции (STA); генерируют первый набор длинных учебных полей для первой STA, причем первый набор длинных учебных полей включает по меньшей мере еще два длинных учебных поля по сравнению с пространственно-временными потоками в первом наборе пространственно-временных потоков; передают первый набор длинных учебных полей и первый набор пространственно-временных потоков на первую STA. 4 н. и 8 з.п. ф-лы, 11 ил.

СПОСОБ И УСТРОЙСТВО ДЛЯ ПЕРЕДАЧИ СИГНАЛА НИСХОДЯЩЕЙ ЛИНИИ СВЯЗИ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ МIMO

Изобретение относится к системе беспроводной связи с многими входами и многими выходами (MIMO). Изобретение раскрывает, в частности, способ приема сигнала нисходящей линии связи от базовой станции к пользовательскому оборудованию в системе MIMO, которая поддерживает двухуровневую передачу на основе первого и второго антенных портов, содержит этапы, на которых принимают информацию управления нисходящей линии связи (DCI) по каналу управления нисходящей линии связи и принимают данные нисходящей линии связи по каналу данных нисходящей линии связи, причем данные нисходящей линии связи включают в себя один или более из первого транспортного блока и второго транспортного блока, причем информация управления нисходящей линии связи включает в себя указатель новых данных (NDI) для каждого из первого и второго транспортных блоков, и если первый транспортный блок запрещен и второй транспортный блок разрешен, указатель новых данных для первого транспортного блока указывает антенный порт, через который ...

СПОСОБ И УСТРОЙСТВО ПЕРЕДАЧИ ДАННЫХ ПО БЕСПРОВОДНОЙ ЛОКАЛЬНОЙ СЕТИ

Изобретение относится к системам беспроводной связи. Технический результат заключается в усовершенствовании передачи данных по беспроводной локальной сети (БЛС). Способ передачи данных по БЛС включает в себя предоставление возможности принимающей станции принимать кадр системы с многими входами и многими выходами (MBMB-кадр), предоставление возможности принимающей станции определять, является ли MBMB-кадр ошибочным и предназначается ли MBMB-кадр для принимающей станции, предоставление возможности принимающей станции генерировать кадр подтверждения приема (ПП) системы с одним входом и одним выходом (ОВОВ-кадр ПП), если МВМВ-кадр не является ошибочным и предназначается для принимающей станции, и предоставление возможности принимающей станции передавать ОВОВ-кадр ПП на посылающую станцию, которая передала МВМВ-кадр. 8 н. и 28 з.п. ф-лы, 10 ил.

ОБРАБОТКА HARQ-ACK ДЛЯ НЕПРЕДУСМОТРЕННЫХ НИСХОДЯЩИХ ПОДКАДРОВ

Изобретение относится к области связи, использующей беспроводные сети, основанные на передаче сообщений через ненадежную среду, и осуществления беспроводной связи в LTE сетях с предоставлением гибридного автоматического запроса повторной передачи (HARQ). Изобретение раскрывает способ предоставления HARQ отклика в LTE сети для формата 1b PUCCH, который включает в себя этапы, на которых: принимают одно или более назначений нисходящих каналов окна пакетирования по беспроводному нисходящему каналу управления; устанавливают статус приема для каждого подкадра нисходящего канала для передачи данных в окне пакетирования исходя из того, был ли связан подкадр на нисходящем канале для передачи данных с одним отдельным принятым назначением нисходящего канала, и исходя из того, был ли успешно принят подкадр; устанавливают статус приема для подкадров нисходящего канала для передачи данных в окне пакетирования, которые не имеют соответствующего назначения нисходящего канала, в заданное значение; и передают ...

СПОСОБ ПЕЛЕНГАЦИИ ИЗЛУЧАЮЩЕГО ОБЪЕКТА В ФАЗОВЫХ МНОГОШКАЛЬНЫХ УГЛОМЕРНЫХ СИСТЕМАХ

Изобретение относится к пеленгаторам направления прихода электромагнитных, звуковых и других колебаний с использованием разнесенных антенн и фазового метода измерений и предназначено для преимущественного применения в системах радиолокации и радионавигации, определяющих параметры движения летательных аппаратов и других объектов. Технический результат - повышение точности пеленгации излучающего объекта. В заявленном способе используют совместно два типа масштабных шкал - шкалу масштабных баз и шкалу масштабных частот. Для этого вдоль двух взаимно перпендикулярных осей размещают по три и более приемные антенны, образующие две и более измерительные базы, соответствующие шкалам первоначально заданной и промежуточной точности пеленгации. Излучаемый сигнал, содержащий две и более масштабные частоты, при приеме подвергают обработке, заключающейся в измерении разностей фаз по всем масштабным частотам, преобразовании разностей фаз в разности расстояний от объекта до пар приемных антенн, раскрытии ...

СПОСОБ ОПРЕДЕЛЕНИЯ ОТНОСИТЕЛЬНЫХ ДАЛЬНОСТЕЙ ДО ОБЪЕКТА

Изобретение относится к радионавигации и может использоваться для определения относительных дальностей до объекта, в том числе подвижного, от станций наземной системы.Технический результат – повышение точности и увеличение зоны однозначного определения относительных дальностей. В заявленном способе на каждой станции синхронизированно осуществляют передачу радиосигнала в виде двух групп, каждую из которых формируют из трех компонент, являющихся гармоническими колебаниями с равными амплитудами и с заданными частотами. Одно из трех гармонических колебаний первой группы является общим с одним из трех гармонических колебаний второй группы. На объекте квадратурно принимают совокупность переданных станциями радиосигналов. Потактно с заданными частотой дискретизации и количеством тактов в цикле формируют соответствующие принятой совокупности радиосигналов цифровые квадратурные компоненты (ЦКК). Из сформированных ЦКК выделяют и формируют для каждой группы три пары цифровых квадратурных компонент ...

ПРИМЕНЕНИЕ НАБОРА ФИЛЬТРОВ В АДАПТИВНОМ КАНАЛЬНОМ РЕТРАНСЛЯТОРЕ, ИСПОЛЬЗУЮЩЕМ АДАПТИВНЫЕ АНТЕННЫЕ РЕШЕТКИ

... 1. Ретранслятор для сети беспроводной связи, причем ретранслятор выполнен с возможностью обеспечения подавления обратной связи, при этом ретранслятор содержит: !модуль вычислений, выполненный с возможностью выполнения вычислений набора фильтров для весовых коэффициентов, используемых корректором, причем N выборок сигнала передатчика и/или приемника сохраняются, как часть операций набора фильтров; и !контур корректированного подавления обратной связи, содержащий набор фильтров, действующий совместно с модулем вычислений для генерирования весовых коэффициентов, выводимых из одной или более операций корреляции для обеспечения подавления и развязки сигнала. ! 2. Ретранслятор по п.1, в котором N больше или равно одному. ! 3. Ретранслятор по п.1, в котором вычисления подавления с помощью набора фильтров содержат вычисления минимальной среднеквадратической ошибки (MMSE). ! 4. Ретранслятор по п.1, дополнительно содержащий один или более модулей быстрого преобразования Фурье (FFT), выполненных с ...

СПОСОБ ПЕРЕДАЧИ СИГНАЛА, ОКОНЕЧНОЕ УСТРОЙСТВО И СЕТЕВОЕ УСТРОЙСТВО

Изобретение относится к области средств связи и, более конкретно, к способу передачи сигнала, оконечному устройству и сетевому устройству, таким образом улучшая эффективность обнаружения последующего сигнала. Технический результат заключается в повышении эффективности последующего обнаружения сигнала за счет определения, используется ли один и тот же луч для передачи N сигналов согласно информации указания луча, и осуществления передачи сигнала на основании указанного определения, так что оконечное устройство и сетевое устройство могут определять соответствующие оптимальные лучи, используемые для передачи или приема сигнала. Способ включает: прием информации указания луча, передаваемой сетевым устройством и используемой для указания того, являются ли лучи для передачи N сигналов одними и теми же, причем N является целым числом, которое больше чем 1; и передачу N сигналов сетевым устройством согласно информации указания луча. 3 н. и 19 з.п. ф-лы, 8 ил.

УЧАСТОК ОБСАДНОЙ ТРУБЫ, ИМЕЮЩИЙ ПО МЕНЬШЕЙ МЕРЕ ОДНО УСТРОЙСТВО ПЕРЕДАЧИ И ПРИЕМА ДАННЫХ

СПОСОБ СИГНАЛИЗАЦИИ ПРЕДВАРИТЕЛЬНОГО КОДИРОВАНИЯ В РЕЖИМЕ ПЕРЕДАЧИ С СОВМЕСТНЫМ ФОРМИРОВАНИЕМ ДИАГРАММЫ НАПРАВЛЕННОСТИ

... 1. Способ управления вторичной станцией (410, 610, 710, 810) в сети, причем вторичная станция содержит приемопередающее устройство, выполненное с возможностью одновременного приема передач (4002a, 4002b) из первой первичной станции (400a, 600a, 700a, 800a), управляющей первой сотой (401a, 601a, 701a, 801a), и передач, по меньшей мере, из одной второй первичной станции (400b, 600b, 700b, 800b), управляющей второй сотой (401b, 601b, 701b, 801b), при этом способ содержит этапы, на которых посредством вторичной станции:(a) выбирают первую матрицу предварительного кодирования для первой соты из первичного набора матриц предварительного кодирования для первой соты,(b) выбирают, в зависимости от первой матрицы предварительного кодирования в соответствии со схемой предварительного кодирования, поднабор из вторичного набора матриц предварительного кодирования для второй соты, причем поднабор состоит, по меньшей мере, из одной матрицы предварительного кодирования для второй соты,(c) выбирают вторую ...

СПОСОБ СОЕДИНЕНИЯ С ВОЗМОЖНОСТЬЮ ОБМЕНА ДАННЫМИ МОБИЛЬНЫХ УСТРОЙСТВ С БЕСПРОВОДНЫМИ ЛОКАЛЬНЫМИ ВЫЧИСЛИТЕЛЬНЫМИ СЕТЯМИ ТРАНСПОРТНЫХ СРЕДСТВ И СООТВЕТСТВУЮЩЕЕ УСТРОЙСТВО

СИСТЕМА И СПОСОБ БЕСПРОВОДНОЙ СВЯЗИ С РАСПРЕДЕЛЕННЫМИ ВХОДАМИ И РАСПРЕДЕЛЕННЫМИ ВЫХОДАМИ

... 1. Способ динамической адаптации характеристик связи многоантенной системы (MAC) с многопользовательскими (МП) передачами (МП-МАС), содержащий этапы, на которых:передают обучающий сигнал от каждой антенны базовой станции к каждому из множества беспроводных клиентских устройств, причем каждое из клиентских устройств анализирует каждый обучающий сигнал для выработки характеристических данных канала, и принимают характеристические данные канала на базовой станции;определяют мгновенное или статистическое качество канала (показатель качества линии связи) для беспроводных клиентских устройств с помощью характеристических данных канала;определяют поднабор пользователей и режим передачи МП-МАС на основе показателя качества линии связи;вычисляют множество весов предварительного кодера МП-МАС на основе характеристических данных каналов;предварительно кодируют данные с помощью весов предварительного кодера МП-МАС для генерирования сигналов предварительно кодированных данных для каждой антенны базовой ...

СИСТЕМА И СПОСОБ БЕСПРОВОДНОЙ СВЯЗИ С РАСПРЕДЕЛЕННЫМИ ВХОДАМИ И РАСПРЕДЕЛЕННЫМИ ВЫХОДАМИ

... 1. Способ компенсации синфазного и квадратурного (I/Q) дисбалансов в многоантенной системе (MAC) с многопользовательскими (МП) передачами (МП-МАС), содержащий этапы, на которых:передают обучающий сигнал от каждой антенны базовой станции к каждому из множества беспроводных клиентских устройств, причем каждое клиентское устройство анализирует каждый обучающий сигнал для выработки характеристических данных канала, и принимают указанные характеристические данные каналов на базовой станции;вычисляют множество весов предварительного кодера МП-МАС на основе характеристических данных каналов, причем веса предварительного кодера МП-МАС вычисляют для предварительного подавления помех, вызванных I/Q дисбалансами усиления и фазы, и/или помех между пользователями;предварительно кодируют данные с использованием весов предварительного кодера МП-МАС для генерирования сигналов предварительно кодированных данных для каждой антенны базовой станции; ипередают сигналы предварительно кодированных данных через ...

КОНФИГУРАЦИИ АНТЕННЫХ РЕШЕТОК ДЛЯ WLAN С ВЫСОКОЙ ПРОПУСКНОЙ СПОСОБНОСТЬЮ

... 1. Антенная решетка высокого порядка для использования в связи с Множеством Входов и Множеством Выходов (MIMO), содержащая: ! плоскость заземления с по меньшей мере четырьмя сформированными в ней крестообразными щелями, причем упомянутые по меньшей мере четыре крестообразные щели расположены симметрично относительно двух перпендикулярных осей плоскости заземления; и ! по меньшей мере, четыре совмещенные пары щелевых антенн с двойной поляризацией, причем каждая из упомянутых пар сформирована с парой выводов, продолжающихся за пределы соответствующей одной из крестообразных щелей, причем каждый вывод предназначен для переноса энергии сигнала к или от щели соответствующей крестообразной щели. ! 2. Антенная решетка по п.1, в которой угловая ориентация каждой из по меньшей мере четырех крестообразных щелей, по существу, одинакова. ! 3. Антенная решетка по п.1, в которой угловая ориентация по меньшей мере двух из четырех крестообразных щелей, по существу, отличается от угловой ориентации по меньшей ...

УСТРОЙСТВО, СИСТЕМА И СПОСОБ БЕСПРОВОДНОЙ СВЯЗИ ЧЕРЕЗ МНОЖЕСТВЕННЫЕ АНТЕННЫЕ КОМПЛЕКТЫ

... 1. Устройство, включающее в себяблок беспроводной связи для передачи и приема сигналов через один или более квазивсенаправленных антенных комплектов,причем блок беспроводной связи предназначен для передачи, через каждый квазивсенаправленный антенный комплект, множества первых передач, для приема, в ответ на первые передачи, множества вторых передач от другого устройства через один или более квазивсенаправленных антенных комплектов, и для выбора на основании вторых передач, по меньшей мере, одного выбранного передающего антенного комплекта для передачи на другое устройство и выбранного приемного антенного комплекта для приема передач от другого устройства.2. Устройство по п.1, в котором каждый квазивсенаправленный антенный комплект включает в себя, по меньшей мере, один сектор передающей антенны, и блок беспроводной связи предназначен для передачи множества первых обучающих пакетов через каждый сектор передающей антенны каждого квазивсенаправленного антенного комплекта и для выбора на основании ...

Антенна и терминал

СПОСОБ ОБРАБОТКИ ЗОЛЫ И УСТАНОВКА ДЛЯ ОБРАБОТКИ ЗОЛЫ

... 1. Способ обработки золы, в котором зольную пыль отделяют от потока продуктового газа, полученного при газификации топлива, причем указанную зольную пыль сжигают в псевдоожиженном слое для снижения содержания углерода в золе, после чего топочные газы от сжигания обрабатывают, отличающийся тем, чтов первой стадии золу сжигают в псевдоожиженном слое при температуре не выше 800°С для снижения содержания углерода, иво второй стадии топочные газы сжигают в независимом процессе сгорания, причем условия горения достигают температуры по меньшей мере 850°С.2. Способ по п.1, отличающийся тем, что перед процессом сгорания тонкодисперсный материал золы, унесенной в топочных газах сжигания с псевдоожиженным слоем, отделяют от них.3. Способ по п.1 или 2, отличающийся тем, что сжигание в псевдоожиженном слое происходит в циркулирующем псевдоожиженном слое (CFB).4. Способ по п.1 или 2, отличающийся тем, что после сжигания в псевдоожиженном слое остаточный углерод составляет менее 5 вес.% от количества ...

СИСТЕМА РАДИОСВЯЗИ

... 1. Приемное устройство радиосвязи для работы по меньшей мере на одной частоте выше 200 МГц и для приема сигналов, включающих ортогонально кодированные подпотоки данных, полученные из потока исходных данных, содержащее антенную решетку, имеющую по меньшей мере две антенны для обеспечения разнесенного приема и приемную схему, соединенную с антенной решеткой и имеющую каскад детектирования для обнаружения подпотоков данных и каскад сумматора для объединения обнаруженных подпотоков данных для восстановления потока данных источника, причем каждая из антенн содержит электрически изолирующий сердечник из твердого материала, относительная диэлектрическая проницаемость которого больше 5, и структуру из трехмерных антенных элементов, расположенную на внешней поверхности сердечника или рядом с ней и ограничивающую внутренний объем, большую часть которого занимает материал сердечника. ! 2. Устройство по п.1, в котором каскад детектирования содержит компенсирующую схему, по существу выполненную с возможностью ...

СПОСОБ УПРАВЛЕНИЯ МОЩНОСТЬЮ ПЕРЕДАЧИ С ЭМУЛЯЦИЕЙ РАСПРОСТРАНЕНИЯ ОПОРНОГО СИГНАЛА, ИСПОЛЬЗУЮЩЕГОСЯ ДЛЯ ОЦЕНКИ ПОТЕРЬ, ПО КАНАЛУ С ПРЕДВАРИТЕЛЬНЫМ КОДИРОВАНИЕМ, РЕАЛИЗУЮЩЕЕ ЕГО УСТРОЙСТВО И ИХ ВАРИАНТЫ

Изобретение относится к области беспроводной связи. Техническим результатом является повышение точности оценки мощности приема опорного сигнала (RSRP), определения потерь при распространении сигнала (PL) и выполнения управления мощностью (PC) без увеличения накладных расходов. Упомянутый технический результат достигается тем, что принимают опорный сигнал информации о состоянии канала (CSI-RS), передаваемый c цифровых портов приемо-передающего антенного блока точки приема-передачи для находящихся в обслуживаемой соте пользовательских оборудований; измеряют канал c цифровых портов приемо-передающего антенного блока точки приема-передачи на основе упомянутого CSI-RS; получают непосредственное указание или аппроксимацию предварительного кодирования, которое подлежит применению точкой приема-передачи для связи с пользовательским оборудованием (UE); на основе эмулирования распространения опорного сигнала от точки приема-передачи (TRP) на UE по эквивалентному каналу, получаемому путем применения ...

Kommunikationsgerät mit Empfangsantennenabstimmung

Ein Kommunikationsgerät, ein Verfahren und ein Computerprogrammprodukt stellen eine Konfiguration einer Schaltmatrix eines Radiofrequenz-Frontend (RF-Frontend) des Kommunikationsgeräts für einen Empfangsantennen-Abstimmungsmodus durch eine Steuereinheit bereit. Der Empfangsantennen-Abstimmungsmodus verbindet einen Sender kommunizierend mit einer ersten von einer oder mehreren Empfangsantennen. Ein Referenzsignal wird über die erste Empfangsantenne mit einer gewählten Sendeleistungseinstellung des Senders gesendet. Ein Feedback-Empfänger misst die Größe und die Phasenwerte sowohl eines vorwärtsgekoppelten Sendesignals als auch eines rückwärtsgekoppelten Reflexionssignals des Referenzsignals. Ein Impedanzwert der ersten Empfangsantenne wird basierend auf der gemessenen Größe und den gemessenen Phasenwerten und dem mit der gewählten Sendeleistungseinstellung gesendeten Referenzsignal bestimmt. Die erste Empfangsantenne wird durch das Antennenabstimmungsmodul unter Verwendung des Impedanzwerts ...

VERFAHREN ZUR BASISBANDVERARBEITUNG, BASIEREND AUF INTELLIGENTER ANTENNE UND INTERFERENZAUSLÖSCHUNG

VERFAHREN ZUM ÜBERTRAGEN UND EMPFANGEN VON DATEN UND VORRICHTUNG DAFÜR

KANALSCHÄTZER UND VERFAHREN ZUR SCHÄTZUNG EINER KANALÜBERTRAGUNGSFUNKTION SOWIE VORRICHTUNG UND VERFAHREN ZUR ERZEUGUNG VON PILOTSEQUENZEN

Wireless communications methods and apparatus

Interference mitigation

Training for multiple-antenna communications

System for transmitting and receiving data

Radio signal repeating apparatus of code division multiple access communication system

Method and apparatus for detecting a data stream based on an estimated data stream and an estimated interference.

A method and an apparatus fof detecting a data stream comprising estimating a data stream from a received signal, generating an interference estimate based on said estimated data stream, detecting the data stream using said interference estimate.

Communications system

Network element, integrated circuit and method of assigning channels

A network element, or a method of controlling an antenna array arrangement, comprises: a plurality of antenna element feeds coupling via an interface with a plurality of radio frequency circuits which are connectable to a plurality of channels and where a signal processor applies a signal to a channel or an antenna element feed and detects the presence of the signal in the feed to at least one antenna element feed or to at least one channel and then records the detected relationships between the antenna element feeds and the channels. The applied signal may be a pilot signal. The recorded relationships can then be used in dynamically assigning and establishing desired signal connections between logical channels and the antenna elements during the operation of an antenna array. The network element and method may form part of an automatic self test system for an active antenna array arrangement. A computer program product may be arranged to perform the method and the physical channels associated ...

System for transmitting and receiving data

A receiving system

A receiving system

Diversity receiver front end system with phase-shifting components

A multi-band receiver comprises a plurality of parallel paths. Each path passes a different frequency band and includes a respective amplifier 314a, 314b. At least one of the paths also has a phase-shift component 624a, 624d. The phase-shift component of a first path is configured to correct for a phase-shift at an out-of-band frequency caused by a component in the first path. The component causing the out-of-band phase shift may be the path’s amplifier. In an embodiment, a phase-shift component 624a disposed along a first path (for passing a first frequency band) is configured to phase-shift a second frequency band signal based on a phase shift in the second frequency band caused by the amplifier 314a in the first path. The second frequency band signal may pass through the first path in both directions after leaking from a second path through the combiner. The phase-shifting may ensure that at the output of the first path, a first frequency band signal is in-phase with a reflected second ...

INSTRUMENT FOR SIGNAL TRANSMISSION

Radio communication system

Bi-directional vector modulator

RFID reader

Improvements in or relating to radio systems for supplying information relating to the interior of a living body

... 891,754. Radio receiving systems; inductive signalling. TELEFUNKEN G.m.b.H. Jan. 5, 1961 [Jan. 16, 1960], No. 512/61. Drawings to Specification. Class 40(5). A swallowable radio transmitter, for obtaining information regarding the interior of a patient, co-operates with a receiving equipment including at least two pick-up coils placed at different points outside the patient, and means for automatically feeding to the receiver signals derived from that coil receiving the stronger signals. The system follows conventional diversity reception practice.

Training symbol format for mimo ofdm systems

Distributed radio frequency communication systems for automotive

A distributed radio frequency (RF) communication system for an automotive vehicle, which allows data to be transmitted from a digital processing circuit 251 at a first location within the system to a radio frequency module 255a-255n at a second location within the system. The digital processing circuit is connected to a first serializer/deserializer (SerDes) circuit 252, and the RF module is connected to a second SerDes circuit 253a-253n. The two SerDes circuits are connected by cabling 254 which they can communicate digital data over. This allows the RF module to communicate with the digital processing circuit in a digital format eliminating the need for higher cost cabling (e.g. due to higher noise immunity arising from using digital signaling). The RF module may be located close to an antenna 257a-257n, and the digital processing circuitry may be placed in an area of the automobile with a lower temperature. The RF module may include an RF front-end (RFFE) and a transceiver and the digital ...

PROCEDURE FOR THE CONTROLLING OF THE SIGNAL TRANSMISSION IN A SYSTEM WITH SEVERAL ENTRANCES AND SEVERAL EXITS

RADIO COMMUNICATION SYSTEM

COMMUNICATION PROCEDURE WITH ADAPTIVE CALL CONTROL

PROCEDURE AND DEVICE FOR SIGNAL PROCESSING

OFDM CHANNEL ESTIMATION AND - ADJUSTING USING SEVERAL TRANSMITTING ANTENNAS

SIGNAL FROM MIMO ASSIGNMENTS

SYSTEM AND PROCEDURE FOR THE WIRELESS DUPLEX COMMUNICATION WITH RAUMDIVERSITY

PRACTICAL SPACE-TIME RADIO TRANSMISSION PROCEDURE FOR THE IMPROVEMENT THAT CDMA ÜBERTRAGUNGSKAPAZITÄT

Conveying hypotheses through resource selection of synchronization and broadcast channels

According to an aspect of the disclosure, a base station may convey the parameter information to the UE based on selection of particular resources to be used for transmission of synchronization signals, where the selected resources correspond to the particular parameter information. The UE may blindly detect the synchronization signals on various candidate resources and determine the parameter information based on the resources where the synchronization signals are detected. The apparatus may be a base station. In an aspect, the base station determines parameter information of one or more parameters. The base station selects, based on the parameter information, synchronization resources from a plurality of candidate resources for transmission of one or more synchronization signals, where the selected synchronization resources correspond to the parameter information. The base station transmits the one or more synchronization signals using the selected synchronization resources.

DIRECTED WIRELESS COMMUNICATION

Pager having simultaneous multichannel scanning function and data transmitting/receiving method thereof

Millimetre wave (mmw) communication system and method, using multiple receive and transmit antennas

Diversity transmission modes for MIMO OFDM communication systems

Casing segment having at least one transmission crossover arrangement

A casing segment includes a conductive tubular body and at least one transmission crossover arrangement. Each transmission crossover arrangement has an inductive adapter in communication with a coil antenna that encircles an exterior of the tubular body.

Transmission scheme and quasi co-location assumption of antenna ports for PDSCH of transmission mode 10 for LTE advanced

Methods and apparatuses determine and indicate QCL behavior for or to a UE. A method for determining QCL behavior for the UE method includes, when configured in TM10 for a serving cell, determining whether a CRC for a PDSCH transmission scheduled by DCI format 1A is scrambled using a C-RNTI. The method also includes, in response to determining C-RNTI scrambling, determining whether a transmission scheme of the PDSCH transmission uses a non-MBSFN subframe configuration and whether the PDSCH transmission is transmitted on antenna port 0 or a TxD scheme is used. The method further includes, in response to determining the non-MBSFN subframe configuration and antenna port 0 or the TxD scheme being used, determining to use QCL behavior 1 for PDSCH reception. Additionally, the method includes, in response to determining a MBSFN subframe configuration and antenna port 7 being used, determining to use QCL behavior 2 for PDSCH reception.

Mobile radio aerial installation

Base station device and radio receiving method

Vector measuring aerial arrays for magnetic induction communication systems

WIRELESS COMMUNICATIONS SYSTEM, WIRELESS TRANSMITTER, AND WIRELESS RECEIVER

This invention includes a wireless transmitter comprising an IF-signal generator that modulates input signals into those of an intermediate frequency band, signal distributors that distribute signals from the IF-signal generator, and a plurality of signal-transmission units that convert the signals distributed by the signal distributors into those of a radio frequency band, and then transmit the converted radio signals. The invention also includes a wireless receiver that receives the radio-frequency-band modulated signals and restores the signals of the intermediate frequency band. In this way, effective diversity is realized and signal interruptions are prevented. In addition, a handy, low-cost wireless communications system is provided.

SYSTEM AND METHOD FOR DISTRIBUTED INPUT DISTRIBUTED OUTPUT WIRELESS COMMUNICATIONS

ELECTRONIC DEVICE AND WIRELESS COMMUNICATION METHOD IN WIRELESS COMMUNICATION SYSTEM

The disclosure relates to an electronic device and a wireless communication method in a wireless communication system. According to the disclosure, the electronic device comprises one or more processing circuits. The processing circuit is configured to execute the following operation: configure time mapping information between a downlink subframe carrying uplink scheduling grant signaling and an uplink subframe carrying uplink transmission, comprising physical uplink shared channel PUSCH transmission, scheduled by the uplink scheduling grant signaling, and performed on an unauthorized channel by user equipment in the wireless communication system. By means of the electronic device and the wireless communication method in the disclosure, a time mapping relationship between a downlink subframe carrying uplink scheduling grant signaling and an uplink subframe carrying uplink transmission comprising PUSCH transmission can be determined, thereby realizing effective utilization of an unlicensed ...

TRANSMITTING/RECEIVING APPARATUS FOR ELECTROMAGNETIC SIGNALS

The invention relates to a transmitting/receiving apparatus for electromagnetic signals which combines signals transmitted by four transmitters by means of two hybrid and/or broadband combiners. The broadband combiners comprise two filters which define frequency ranges within which the respectively assigned transmitters can transmit. The filters cover in particular a plurality of frequency channels, with the result that synthesizer hopping is possible. The invention furthermore relates to a method for combined synthesizer and baseband hopping which is particularly advantageous for the apparatus according to the invention in order to ensure effective channel utilization.

ITERATIVE DIVERSITY RECEPTION

Methods, apparatuses, and systems are presented for deriving data from a composite signal involving (a) receiving a composite signal comprising contributions from a plurality of individual signals transmitted over different paths, the plurality of individual signals representing a common data sequence, (b) calculating soft values of a first type taking into account the received composite signal and soft values of a second type, (c) generating symbol outputs taking into account the soft values of the first type, (d) calculating soft values of the second type taking into account the symbol outputs, (e) feeding back soft values of the second type, (f) iteratively updating soft values of the first type, symbol outputs, and soft values of the second type by repeating previous steps, and (g) deriving data using the updated symbol outputs.

SYSTEM AND METHOD FOR DISTRIBUTED INPUT DISTRIBUTED OUTPUT WIRELESS COMMUNICATIONS

A system and method are described for compensating for frequency and phase offsets in a multiple antenna system (MAS) with multiuser (MU) transmissions ("MU-MAS"). The method may include transmitting a training signal from each antenna of a base station to one of a plurality of wireless client devices, generating frequency offset compensation data, receiving the frequency offset compensation data at the base station, computing MU-MAS precoder weights based on the frequency offset compensation data to precancel the frequency offset at the transmitter, and computing a plurality of MU-MAS precoder weights based on channel characterization data.

WIRELESS COMMUNICATION SYSTEM, AND DEVICE AND METHOD IN WIRELESS COMMUNICATION SYSTEM

CA 02981197 2017-09-28 Sony China Ref: CNPA15002CA00 Unitalen Ref.: 0P1715-09-1042 ABSTRACT Disclosed are a device and method in a wireless communication system. The device comprises: a first generating unit configured to generate a first pre-coding matrix according to first channel information on a channel between a first communication apparatus and a second communication apparatus; a second generating unit configured to generate a second pre-coding matrix according to the first pre-coding matrix and second channel information on the channel; and a pre-coding unit configured to pre-code a data signal according to the first pre-coding matrix and the second pre-coding matrix. According to the embodiments of the present invention, interference between user equipments can be effectively removed, the operation complexity is reduced, and the whole performance of the system is optimized.

METHOD FOR SETTING TRANSMIT AND RECEIVE CHAINS OF CHANNELS FORMED BY A MOBILE RADIO SYSTEM BASE STATION

L'invention consiste après une étape (4) de calibration de la base d'antennes: dans une étape (5) de tarage des chaînes de réception relatives à chaque voie, à distribuer un premier signal de tarage déterminé, de manière synchrone sur chacune des chaînes de réception, à calculer un filtre d'égalisation inversant les fonctions de transfert relatives à chaque chaîne de réception; dans une étape (6) de tarage des chaînes d'émission relatives à chaque voie, à distribuer un deuxième signal de tarage déterminé, de manière synchrone sur chacune des chaînes d'émission, à prélever dans chacune des voies une partie du signal d'émission avant sa transmission à la base d'antennes pour le réinjecter dans les chaînes de réception, et à calculer un filtre d'égalisation inversant les fonctions de transfert relatives à chaque chaîne d'émission; à effectuer (7) la réception des signaux en provenance de la base d'antennes à travers les filtres d'égalisation précédemment calculés pour les chaînes de réception ...

METHOD FOR TRANSMITTING DIGITAL DATA VIA NOISE-ENCUMBERED RADIO CHANNELS AND DEVICE FOR RECEIVING DIGITAL DATA TRANSMITTED VIA NOISE-ENCUMBERED RADIO CHANNELS

A method for transmitting digitally coded data of a radio program (A) is proposed, in which the digitally coded data are modulated by a modulation method, in particular by OFDM. The data are modulated to at least one carrier wave. The data are transmitted in a transmission frame. The method is characterized in that the data of a radio program (A) are transmitted, with at least one repetition, and then are evaluated in common. In this process the complex values (20, 21), which have been furnished by the demodulator circuit (53), are added together. For a device for receiving digitally coded data of a radio program (A), it is proposed that in it, not only an high-frequency conversion stage (51), an analog/digital converter (52) and a demodulator circuit (53) but also a buffer memory (57) are provided, in which buffer memory at least the data of the time segment of the radio program (A) upon the initial transmission are buffer-stored, and finally an adder stage (58) is provided, in which the ...

METHOD AND APPARATUS FOR ESTIMATING A SIGNAL FADING CHARACTERISTIC

A method and apparatus for measuring a characteristic of a fading signal received using two or more branch diversity receivers (100) is presented. Th is fading characteristic is proportional to the speed of the user. In a first embodiment the number of times the antenna branches change in a selection diversity process is counted (160), and the result is scaled (170) for imbalance between the branches. The output of a fading quality estimator (180), indicative of the fading and generally proportional to the speed, is thereby obtained.

INTERSTITIAL SECTOR SYSTEM

A method and apparatus for improving the reception characteristics for lowerpower portable telephone units at a base station site (8) is disclosed. A normal three-sector antenna site (8) is divided into a plurality of sectors each having a central line of focus. The frequency channels assigned to the base station site (8) are divided among the sectors, and an antenna (10) within each sector radiates the assigned frequencies along the central line of focus for each of the sectors.

HIGHLY BANDWIDTH-EFFICIENT COMMUNICATIONS

A discret multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible ...

METHOD AND APPARATUS FOR OBTAINING TRANSMIT DIVERSITY USING SWITCHED ANTENNAS

A method and apparatus for providing diversity transmissions to a receiving unit. A transmitting station used to communicate with the receiving unit may have a first and second antenna (34, 36) and repeatedly switch between the two antennas (34, 36) during the transmission of information to the receiving unit. Transmission of information may be initiated from a first antenna (34), and when terminated, transmission of information from a second antenna (36) is initiated. Likewise, after transmission of information from the second antenna (36) is terminated, transmission of information from the first antenna (34) continues. This "swapping" of antennas continues until the information transfer ends. Antenna swapping results in diversity transmissions that improve the ability of the receiving unit to receive a coded and interleaved information transmitted from the transmitting station. The interleaver may disperse the encoded symbols in each antenna dwell period such that decoder decisions are ...

PATH SEARCH CIRCUIT FOR SIMULTANEOUSLY PERFORMING ANTENNA DIRECTIVITY CONTROL AND PATH SEARCH

A path search circuit simultaneously performs antenna directivity control and a path search. A weighting controller controls weighting coefficients to establish an antenna directivity in a plurality of directions in which a party to communicate with is possibly present, when a communication session starts. A weighted-mean-value processor calculates delay profiles for the respective antenna directivities. A correlation peak detector detects a peak from the calculated delay profiles for thereby carrying out general antenna directivity control and a path search. At the time of starting the communication session when the direction of a mobile terminal is unknown, a path search can be conducted using a signal with a Eb/Io increased by an antenna gain for increased path search accuracy.

Hochfrequenzelektrisches Navigationsverfahren.

Radioübertragungsanlage mit mindestens einer Antennenanordnung, die aus mehreren, in einer geraden Linie angeordneten Antennen besteht.

Anordnung zur Durchführung von Magen- und Darmuntersuchungen mittels eines Pillensenders

Signal transmission device using magnetic fields

The signal transmission device uses at least two transmitting coils (Ls1, Ls2-Lsn) which all lie in a horizontal plane and between their planes, the electrical axes Es1, Es2, Esn) all have the same angle (alpha) of intersection. The magnetic fields used to transmit the signals are excited at the same frequency using a current derived from a common oscillator, in which case only a single receiving coil (Le) is required. Where each of the signal transmission magnetic fields is excited at another frequency, so that in space their mutual compensations are excluded, then in this case several, but at least two, receiving coils (Le1, Le2 etc.) are required to receive the signal-transmitting magnetic fields.

INSTALLATION OF DIGITAL TELEPHONY.

СХЕМА ТА СПОСІБ ДЛЯ КОНТРОЛЮ ПЕРЕДАЧІ І/АБО ПРИЙОМУ СИГНАЛІВ (ВАРІАНТИ), БАЗОВА СТАНЦІЯ

Схема для контролю передачі і/або прийому сигналів в системі радіозв'язку, яка містить засоби (ТХ, RX) передачі та прийому даних, кожен з яких під'єднаний до одного елемента антенної решітки (#1...#n), у якому принаймні один із згаданих засобів (ТХ, RX) передачі та прийому даних додатково під'єднаний до калібрувальної антени для передачі і/або прийому тестових сигналів до і/або від згаданих антенних елементів (#1...#n), принаймні один калібрувальний процесор для визначення змін згаданих тестувальних сигналів у згаданих засобах (ТХ, RX) передачі та прийому даних та процесор формування діаграми направленості для використання визначених змін при формуванні діаграми направленості і/або при визначенні напряму надходження відповідним чином переданих та прийнятих радіосигналів згаданими антенними елементами (#1...#n).

TECHNIQUES FOR METHOD FOR CORRECTION FOR PHASE AND AMPLITUDE OFFSETS IN A MIMO RADIO DEVICE

Multiplexer switch and related product

Antenna channel correction signal sending method and apparatus, and base station

Hybrid beam forming uplink multi-user pairing method and device

For a multi-antenna system of UE, in the base station method and device

Transmission diversity method in single carrier block transmission of multi-antenna communication system

Based on the invention, a transmission diversity method in single carrier wave block transmission of multi antenna communication system is disclosed, it includes: at the sending end, aiming at one path of emission antenna, the original block signal is inserted with protecting interval and sent via said one path of emission antenna, aiming at the other path of emission antenna, firstly the original block signal is parallel processed, summing the signal which is parallel processed and inserting protecting interval, and sending via said other emission antenna, said two parallel processes are constructed with conjugating replacement process and character sequence weighting process; at the receiving end, four frequency signals which is sent by said one path of emission antenna and the other emission antenna in adjacent two sub carrier waves are linear poised in traditional Alamouti mode.

Method of spatio-temporal coding for dual-antenna communication system of pulsed UWB type

The present invention relates to a method of spatio-temporal coding for UWB transmission system comprising two radiative elements. This method codes a block of information symbols (S=(a1, a2, a3, a4)) belonging to a PPM modulation constellation or PPM-PAM composite modulation constellation exhibiting a number of time positions that is greater than or equal to 3, as a sequence of vectors formula (I), the components of a vector being intended to modulate a pulsed UWB signal for a radiative element of said system and for a given transmission interval (Tf). A first and a second of said vectors are obtained by means of a first linear combination of a first and of a second pair of said symbols and a third and a fourth of said vectors are obtained by means of a second linear combination of said first and second pairs of said symbols, the first and second linear combinations using scalar coefficients whose respective ratios are substantially equal to the number of gold and to its opposite, one ...

Transmitter capable of generating a frame and method therefor

A method of transmitting feedback information in a multi-input, multi-output (MIMO) system

A method of transmitting feedback information in a Multi-Input, Multi-Output (MIMO) system is disclosed. In the method, a mobile station (MS) determines to transmit feedback information and feedback type to a base station (BS) without solicitation from the BS, wherein the feedback type is transmission antenna type, and transmits the feedback information using a MIMO mode feedback extended subheader, wherein the MIMO mode feedback extended subheader appears between a Medium Access Control (MAC) header and a payload.

Data card and data interaction system

Improvement with the devices for radio channels

PROCESS AND DEVICE OF SPACE MULTIPLEXING OF RADIOELECTRIC SIGNALS NONGAUSSIAN EXCHANGES IN CELLULAR RADIOCOMMUNICATIONS

PROCESS AND DEVICE OF COMMUNICATION MULTI-ANTENNES ULTRA-LARGE BANDAGE USING IMPULSES OF HERMIT

Signal Encoding Method and Device, Method for Encoding Joint Feedback Signal

A signal encoding method and device and a method for encoding a joint feedback signal are provided. The signal encoding method includes the following steps. When two carriers are configured with multiple-input and multiple-output (MIMO), Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) signals of the two carriers are combined into a joint feedback signal. The joint feedback signal is mapped into a codeword according to a predetermined mapping relationship between signals and codewords. Therefore, through the method for combining and encoding feedback signals of two carriers for transmission on a code channel in a dual cell (DC)-MIMO mode, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.

Method and apparatus for encoding feedback signal

A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.

Method and communication device for feeding back and receiving pre-coding control indication information

The present invention relates to the field of wireless network communications, and provides a method and a device for receiving and sending Pre-coding Control Indication (PCI) information in uplink Multiple-Input Multiple Output (MIMO) transmission or uplink Closed Loop Transmit Diversity (CLTD) transmission, so as to solve a problem that the uplink MIMO communication from a terminal to a Base Station (BS) is unable to be realized in the prior art. A BS transmitting method includes carrying a code sequence, which represents PCI information, in a feedback channel of a BS. The beneficial effect of the present invention is: by feeding back the PCI information, the terminal realizes the maximization of a block length supported by an existing channel condition after the uplink MIMO is introduced, so as to improve an uplink transmission rate.

Wireless transmission apparatus and precoding method

A wireless transmission apparatus able to reliably increase outage capacity according to the state of a propagation path. This apparatus is a wireless transmission apparatus ( 100 ) which transmits a plurality of streams to a wireless reception apparatus; wherein a time/space allocation determining unit ( 107 ) determines the spatial multiplex stream number based on the desired multipath number and the number of reception antenna ports of the wireless reception apparatus, said desired multipath number being calculated based on the detected multipath number, the number of reception antenna ports, and the desired error rate for the plurality of streams; a stream dividing unit ( 109 ) divides the transmission data into a plurality of streams of that spatial multiplex stream number; a transmission weight calculation unit ( 108 ) calculates a transmission weight based on the desired multipath number, spatial multiplex stream number, and a channel estimation value; and a time precoding unit ( 1103 ) and a spatial precoding unit ( 111 ) use the transmission weight to precode the plurality of streams.

Wireless communication system, device and method

A wireless communication system includes an inverse matrix calculating unit which uses an inverse matrix of a channel matrix of a first combination of L antennas (where L is an integer, 1≦L≦N) selected from the N antennas, so as to calculate an inverse matrix of a channel matrix of a second combination of L antennas selected from the N antennas through an arithmetic operation, and an antenna selecting unit which selects a combination of L antennas from the N antennas as L antennas to be used for communication, the selected combination determining a reference value for antenna selection related to the inverse matrix calculated by the inverse matrix calculating unit so that the reference value for antenna selection fits a successive interference cancellation process carried out for a signal transmitted from the L antennas of the selected combination.

Method and apparatus for transmitting reference signal in multi-antenna system

A method for transmitting a reference signal in a multi-antenna system is provided. The method includes: selecting at least one orthogonal frequency division multiplexing (OFDM) symbol in a subframe containing a plurality of OFDM symbols; allocating a channel quality indication reference signal (CQI RS) capable of measuring a channel state for each of a plurality of antennas to the selected at least one OFDM symbol; and transmitting the CQI RS, wherein the CQI RS is allocated to an OFDM symbol which does not overlap with an OFDM symbol to which a common reference signal to be transmitted to all user equipments in a cell or a dedicated reference signal to be transmitted to a specific user equipment in the cell is allocated.

Systems and methods for pucch feedback in 3gpp wireless networks

A mobile station for use in a wireless network. The mobile station transmits feedback values in a physical uplink control channel (PUCCH) to a base station of the wireless network. The mobile station is operable to transmit to the base station a subband second precoder matrix index (PMI) associated with a particular subband and a subband channel quality indicator (CQI) value associated with the particular subband together in a subframe of the PUCCH.

Orthogonal resource reuse with sdma beams

A wireless communication system can implement beamforming across multiple omni-directional antennas to create beams at different spatial directions. The communication system can arrange the beams in sets, with each set arranged to provide substantially complete coverage over a predetermined coverage area. The communication system can arrange the multiple SDMA beam sets to support substantially complementary coverage areas, such that a main beam from a first set provides coverage to a weak coverage area of the second beam set. The wireless communication system assigns or otherwise allocates substantially orthogonal resources to each of the beam sets. The wireless communication system allocates resources to a communication link using a combination of beam sets and substantially orthogonal resources in order to provide improved coverage without a corresponding increase in interference.

Communication device and communication method, computer program, and communication system

Suitable beam pattern control is performed while performing access control based on physical carrier sense. A communication device transmits frames having a long preamble under a state where signals will not reach unless a beam pattern is formed, thereby enabling access control based on physical carrier sense, and under a state where signals will sufficiently reach without a beam pattern being formed transmits frames having a shorter preamble, thereby suppressing transmission overhead. Also, a beam pattern and preamble type are decided based on transmission/reception history of access control following CSMA/CA procedures.

Transmission using common and dedicated pilots

A method, system, base station and wireless terminal are provided for transmission of a set of mixed pilots that includes both common and dedicated pilots. The method includes selecting a number D of dedicated pilots having regard to performance of the communication link, D≧0, selecting a first pre-coder for pre-coding D dedicated pilots based on some criteria, performing a first pre-coding of the D dedicated pilots with the first pre-coder to produce a set of pre-coded dedicated pilots, performing a second pre-coding of the set of pre-coded dedicated pilots and a set of common pilots to produce a set of mixed pilots, and transmitting data from the transmitter on the communication link with the set of mixed pilots.

Method and apparatus for reporting channel state information of multi-channel in wireless local area network system

A method for reporting channel state information (CSI), performed by a beamformee, in a wireless local area network system using multi-channels is provided. The method includes receiving, from a beamformer, an NDP announcement (NDPA) frame announcing that a null data packet (NDP) frame follows the NDPA frame, receiving the NDP frame from the beamformer, estimating a channel from a training symbol of the NDP frame and transmitting to the beamformer a CSI report frame containing a result obtained by estimating the channel, wherein the channel is a multi-channel acquired by aggregating first and second channels which are non-contiguous to each other, and wherein the CSI report frame includes an average signal to noise ratio (SNR) for each space-time stream of the first channel and a steering matrix for each subcarrier of the first channel and an average SNR for each space-time stream of the second channel and a steering matrix for each subcarrier of the second channel.

Base station, communication system including base station and transmission method

Channel fluctuation values on propagation paths of modulated signals transmitted from a plurality of antennas are estimated, an eigenvalue of a channel fluctuation matrix created with the above-mentioned channel fluctuation values as elements is found in order to relate antenna received signals to modulated signals, and using that eigenvalue, receiving antenna selection, combining of modulated signals, and weighting processing on soft decision decoded values, are performed, and modulated signals are demodulated. By this means, it is possible to perform demodulation processing based on the effective reception power of a modulated signal (that is to say, the essential reception power, of the reception power obtained by a receiving apparatus, that can be effectively used when demodulating a modulated signal), enabling the precision of demodulation of modulated signals to be improved.

Allocating a control channel for carrier aggregation

Methods for allocating a physical downlink control channel (PDCCH) to reduce a number of PDCCH candidates in a search space for carrier aggregation on a user equipment (UE) are disclosed. The method comprises the step of selecting a control channel element (CCE) aggregation level for a PDCCH allocation for each of a plurality of user equipments (UEs) at an evolved NodeB (eNB). The operation of identifying a transmission mode for each of a plurality of component carriers (CCs) associated with the PDCCH at the eNB follows. The next operation of the method is assigning each CC's downlink control information (DCI) into CCEs in a PDCCH search space in the PDCCH starting at a CCE location based on the CC's transmission mode and the CCE aggregation level for the UE receiving the CC.

System and method for synthetic voice generation and modification

Disclosed herein are systems, methods, and non-transitory computer-readable storage media for generating a synthetic voice. A system configured to practice the method combines a first database of a first text-to-speech voice and a second database of a second text-to-speech voice to generate a combined database, selects from the combined database, based on a policy, voice units of a phonetic category for the synthetic voice to yield selected voice units, and synthesizes speech based on the selected voice units. The system can synthesize speech without parameterizing the first text-to-speech voice and the second text-to-speech voice. A policy can define, for a particular phonetic category, from which text-to-speech voice to select voice units. The combined database can include multiple text-to-speech voices from different speakers. The combined database can include voices of a single speaker speaking in different styles. The combined database can include voices of different languages.

Ack/nack transmission for multi-carrier operation

Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In some aspects, a user equipment (UE) receives a data transmission on at least one component carrier (CC) in a plurality of configured CCs. The UE determines acknowledgement/negative acknowledgement (ACK/NACK) information for the data transmission and determines an uplink channel for sending the ACK/NACK information. When the ACK/NACK information is sent on a PUCCH, the UE may perform power control based on which CCs in the plurality of configured CCs data is received. When the ACK/NACK information is sent on a PUSCH, the UE may determine a number of resource elements based on its CC configuration.

Ack/nack transmission for multi-carrier operation with downlink assignment index

Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In one aspect, a UE determines a number of acknowledgement/negative acknowledgement (ACK/NACK) bits for a data transmission on one more component carriers (CCs) based on information obtained from a grant. The grant may be a downlink grant or an uplink grant, and the information obtained may include a number of CCs scheduled for data transmission and/or identifiers of the scheduled CCs. The UE may determine the number of ACK/NACK bits for acknowledging the data transmission based on the number of scheduled CCs and the identifier of each scheduled CC.

Initiation of a mimo communication

The present invention provides a method and apparatus for initiating a multiple input multiple output (MIMO) communication. The method and apparatus includes processing that begins by transmitting a frame formatted in accordance with a default MIMO active transmitter-receiver antenna configuration to a target receiver. The processing continues by receiving at least one response frame from the target receiver. The processing continues by determining a number of receiver antennas of the target receiver from the at least one response frame.

Enforcing constant modulus and finite alphabet properties in adaptive and dual-stage codebooks

Methods and apparatus for enforcing codebook properties (e.g., constant modulus and/or finite alphabet) in adaptive and dual-stage codebooks are described. One example method generally includes receiving multiple feedback aspects of a channel for wireless communications determining multiple codewords based on the multiple feedback aspects, determining a final precoding matrix based on the multiple codewords, enforcing at least one codebook property in at least one of the multiple codewords or the final precoding matrix, applying the final precoding matrix to a plurality of spatial streams to form precoded spatial streams, and transmitting the precoded spatial streams. For certain aspects, enforcing the at least one codebook property includes quantizing elements in each of the multiple codewords and/or the final precoding matrix to the nearest value in a finite alphabet or to increase a performance metric.

Communication system, apparatus and method for antenna array control

A wireless communication system comprises a network element ( 315 ) operably coupled to an antenna array for communicating with a remote wireless communication unit ( 305 ). The antenna array comprises a plurality of radiating elements where at least one first radiating element of the plurality of radiating elements is arranged to create a radiation pattern that comprises a sector beam ( 405 ). The plurality of radiating elements comprises at least one second radiating element arranged to create a major portion of at least one sub-sector beam ( 420, 425, 430 ) within the sector beam ( 405 ).

Method and apparatus for transmitting a frame in a wireless ran system

There is provided a method and apparatus for transmitting a frame which is performed by a transmission STA in a WLAN system. The method of transmitting a frame according to the present invention includes generating an MAC Protocol Data Unit (MPDU) to be transmitted to a target station, generating a PLCP Protocol Data Unit (PPDU) by attaching a Physical Layer Convergence Procedure (PLCP) header to the MPDU, and transmitting the PPDU to the target station. The PLCP header comprises a partial Association ID (AID) of the target station.

Precoding with reduced feedback for coordinated multipoint transmission on the downlink

Techniques for reducing the number of bits needed to specify the best precoding vector for each mobile station in a wireless communication network that employs multi-point transmission are disclosed. An exemplary method begins with the estimation of path loss between a mobile station and each of a plurality of geographically separated transmitter sites, each transmitter site having at least one transmitter antenna. Based on the estimated path losses, one of a plurality of pre-determined subsets (codebooks) of a pre-determined set of antenna precoding vectors is selected. A group index identifying the selected subset is then transmitted to the mobile station. Subsequently, a vector index is received from the mobile station, the vector index corresponding to a precoding vector in the selected subset, and data is transmitted to the mobile station, using the precoding vector applied to the transmitter antennas at the plurality of transmitter sites.

Apparatus for Transmitting and Receiving Data to Provide High-Speed Data Communication and Method Thereof

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

method of pre-equalizing a data signal by time reversal in fdd

Pre-equalizing a data signal transmitted in frequency division duplex by an originating entity having a set of originating antennas to a destination entity having a set of destination antennas, including: transmitting a first pilot by a destination antenna; the originating entity estimating a first impulse response of a first channel; an iterative step including an originating antenna transmitting a second pilot modulated by the first impulse response; the destination entity estimating and time reversing a combined impulse response of the first and second channels; the destination antenna transmitting a third pilot modulated by the time-reversed response; estimating a composite response of the channels; re-iterating the iterative step for some originating antennas; and re-iterating the steps of transmitting a first pilot, estimating the first response, and the iterative step for some destination antennas; and determining pre-equalization coefficients for the data signal from a combination of a set of composite impulse responses.

Configuring component carriers in carrier aggregation

Technology for configuring component carriers in carrier aggregation is disclosed. One method comprises scanning for an enhanced Node B (eNode B) with a user equipment (UE). An eNode B is selected by the UE. The UE is attached to an available carrier provided by the eNode B. The available carrier is designated as a Primary Component Carrier (PCC). The PCC is configured as a component carrier pair comprising a downlink primary component carrier (DL PCC) and an uplink primary component carrier (UL PCC). Mobility management and security input information is received at the UE from the eNode B via the DL PCC and the UL PCC.

System and Method for Channel State Information Feedback in Wireless Communications Systems

A system and method for channel state information feedback in wireless communications systems are provided. A method for reporting channel information includes determining, at a user equipment, a channel information type for first channel information to be reported to a communications controller, determining the first channel information conditioned on previously reported channel information and on the channel information type, and reporting the first channel information, the channel information type, or a combination thereof, to the communications controller.

Codebook generating method and apparatus for generating a codebook for multi-polarized multiple-input multiple-output (mimo) systems

A method of generating a codebook for a multiple-input multiple-output (MIMO) system is provided. The codebook generation method includes: assigning a single-polarized precoding matrix to diagonal blocks among a plurality of blocks arranged in a block diagonal format in which a number of diagonal blocks corresponds to a number of polarization directions of transmitting antennas; and assigning a zero matrix to remaining blocks excluding the diagonal blocks.

Method and apparatus for feedback in closed loop transmitting

A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step 900 of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step 902 includes measuring a composite channel between the transmitter and receiver. A next step 904 includes determining at least one performance metric for each set of weightings in the codebook. A next step 906 includes selecting preferred weightings for each data stream in response to the performance metrics. A next step 908 includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.

Method and System for an Alternating Delta Quantizer for Limited Feedback MIMO Pre-Coders

Aspects of a method and system for an alternating delta quantizer for limited feedback MIMO pre-coders may comprise quantizing a change in channel state information in a MIMO pre-coding system onto at least a first and a second codebook, each of which comprises one or more unitary matrices, using a cost function; feeding back, in an alternating manner, an index to an element of at least the first codebook or the second codebook, associated with the quantizing, from a receiver to a transmitter in said MIMO pre-coding system, and generating the at least first and second codebook based on at least the channel state information. The channel state information may be a matrix V and the cost function may be defined by the following relationship: f  ( A ) = ( 1 N  ∑ j = 1 N   a jj  2 ) where A is a matrix of size N by N and a ij is element (i,j) of matrix A.

Apparatus and method for controlling a wireless feeder network

An apparatus and method are provided for controlling a wireless feeder network which connects access base stations to a communications network. The wireless feeder network comprises a plurality of feeder base stations connected to the communications network and a plurality of feeder terminals connected to the plurality of access base stations. A sounding schedule is determined for the wireless feeder network in dependence on a visibility matrix, the visibility matrix indicative of visibility via the wireless feeder network between each of the plurality of feeder base stations and each of the plurality of feeder terminals. Then a sounding procedure within the wireless feeder network is controlled in accordance with the sounding schedule. The visibility matrix enables a coordinated sounding procedure to be carried out, allowing more accurate channel metrics for the wireless channels of the network to be determined which are not adversely affected by interference between elements of the network.

Cooperative communication method and base station

A cooperative communications method for a wireless network and a corresponding apparatus. In one embodiment, the method includes: obtaining a matrix corresponding to a destination Mobile Station (MS), where the number of rows of the matrix depends on the total number of antennas of MSs in a cooperative area and the number of antennas of the destination MS, and the number of columns of the matrix depends on the number of code streams sent to the destination MS; calculating a precoding matrix according to local Channel State Information (CSI) and the matrix; performing precoding according to the precoding matrix; and performing cooperative communication according to a result of the precoding. The method of this embodiment enables the reduction or elimination of interference between users by specifying a direction matrix, and is applicable to multi-antenna MSs. A cooperative base station (BS) applicable to the foregoing method is also disclosed.

Tomlinson harashima precoding with additional receiver processing in a multi-user multiple-input multiple-output wireless transmission system

A method for processing user symbols with Tomlinson Harashima precoder (THP) in a base station, of a wireless system having K user terminals (UEs) which communicate with the base station via an uplink channel and corresponding downlink (DL) channel, comprises estimating a DL channel matrix H k ; determining receiver processing matrix V k ; computing an effective matrix DL channel H eff ; performing QR decomposition of H eff ; computing THP matrices; calculating scalar weights for the UEs; processing user symbols by the THP having the THP matrices to produce an output of filtered vector symbols for the UEs; directing output of the THP to the channel represented by the DL channel matrix through which communications occur in the wireless system with the UEs; performing additional receiver processing on the transmitted signals at the UEs based on V k for each of the K UEs; and using the scalar weights on the transmitted signals at the UEs.

Orthogonal Resource Selection Transmit Diversity

Methods are disclosed for transmitting a plurality of information bits using resource selection on multiple antennas. In one or more embodiments, the methods include: selecting a first and a second orthogonal resource from an allocation of more than two orthogonal resources according to the state of the plurality of information bits; transmitting a first symbol in a first symbol instant on a first antenna using the first orthogonal resource; and transmitting a second symbol in the first symbol instant on a second antenna using the second orthogonal resource. In some embodiments, the first and second orthogonal resources are different and the first symbol is either a reference symbol or a modulation symbol.

Channel state information transmission method appraratus and system

A precoding method, a precoding apparatus, a Frequency Domain Equalization (FDE) method, and an FDE apparatus are provided in the embodiments of the present invention. The precoding method includes: performing offset modulation for a transmitting signal vector; calculating a precoding matrix according to the offset-modulated transmitting signal vector and a receiver decision signal vector, where the precoding matrix is used for performing precoding for the transmitting signal vector; and performing precoding for the transmitting signal vector according to the precoding matrix. Linear precoding is performed by using the offset-modulated signal on the transmitter, and therefore, the interference caused by multiple antennas and multipath propagation is reduced, the system BER is reduced, and the complexity of implementation is low.

Method for generating codebook, method and apparatus for data transmission

A method for generating a codebook and a method and an apparatus for data transmission are provided. The method includes: receiving a label of a codeword sent by a User Equipment (UE); selecting the codeword identified by the label from the codebook for eight-antenna; and coding data to be sent by using the codeword. The codebook for eight-antenna includes at least one rank-8 codeword for eight-antenna. The rank-8 codeword for eight-antenna is generated by multiplying an inverse matrix of a rotation matrix for eight-antenna with an eight-dimensional matrix formed by rank-4 codewords for four-antenna; or generated by extending rank-4 codewords for eight-antenna, where the rank-4 codeword for eight-antenna is generated according to codewords for four-antenna. Therefore, the codeword in the codebook for eight-antenna is applicable to scenarios including dual-polarization strong correlation, dual-polarization weak correlation, single-polarization strong correlation, and single-polarization weak correlation, etc.

Method, Codebook and Base Station for Precoding

A method, a codebook, and a Base Station (BS) for precoding are provided. The precoding method includes: obtaining a total uplink power of a User Equipment (UE); if the total uplink power is greater than ¾ of a rated total transmit power of antennas, selecting a codeword from a first codebook with imbalanced power between layers; otherwise, selecting a codeword from the first codebook and a second codebook with balanced power between layers, so as for precoding data to be transmitted according to the selected codeword.

Method and apparatus for data transmission based on distributed discrete power control in cooperative multi-user multi-input multi-output system

Disclosed are a method and apparatus capable of enhancing a closed loop multi-input multi-output (MIMO) capacity through distributed discrete power control in the case of cooperatively transmitting information to multiple users through a downlink.

Transitioning from mimo to siso to save power

Various example embodiments are disclosed. According to an example embodiment, an apparatus may include at least one processor and at least one memory. The at least one memory may include computer-executable code that, when executed by the processor, is configured to cause the apparatus to send a message to a node in wireless communication with the apparatus, the message indicating a transition by the apparatus from multiple-input multiple-output (MIMO) to single-input single-output (SISO), and transition from wireless MIMO communication with the node to wireless SISO communication with the node after sending the message to the node.

Method and apparatus for communication with shortened signal formats

Techniques for addressing high interference observed by a receiver in a wireless communication system are disclosed. The receiver may observe different interference power levels across a transmission symbol. In an aspect, the receiver applies different weights to different portions of the transmission symbol to account for fluctuation of interference power across the transmission symbol. In another aspect, a transmitter may send a transmission symbol such that a receiver can ignore a portion of a symbol period with high interference. In one design, the transmitter generates a transmission symbol including at least two copies of a signal component. The transmitter transmits at least one copy of the signal component in a portion of the symbol period in which the receiver does not observe high interference. The receiver processes the at least one copy of the signal component to recover data sent in the transmission symbol.

Methods and systems for enabling feedback in wireless communication networks

Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

Radio communication system, radio communication method, and radio communication device

In the environment of a communication area including a SDM-compatible mobile station for space division multiplex transmission and a SDM-uncompatible mobile station not compatible with space division multiplex transmission, a base station having a plurality of antennas and capable of adaptively changing directivity performs allocation of a mobile station which simultaneously performs space division multiplex transmission (SDM) and space division multiplex access (SDMA) by using a predetermined space division multiplex transmission evaluation criterion and a space division multi access evaluation criterion. By using this radio communication method, it is possible to use the spatial degree of freedom at its maximum and provide a radio communication system having an improved communication capacity.

Method and apparatus for indicating destination stations in wlan system supporting multi-user multiple input multiple output

A method of indicating destination stations, performed by an access point (AP), in a wireless local area network (WLAN) system supporting multi-user multiple input multiple output (MU-MIMO) is provided. The method includes transmitting a sounding request frame to the plurality of destination stations to transmit a sounding frame used for channel estimation between the AP and each destination station, receiving the sounding frame in response to the sounding frame request from each station, and transmitting a first data frame spatially multiplexed with respect to the plurality of destination stations by performing channel estimation on the basis of the sounding frame, wherein the sounding request frame comprises a group identifier (ID) indicating the plurality of destination stations.

Method and apparatus for interference cancellation and detection using precoders

A method to achieve full diversity without sacrificing bandwidth and with a linear complexity in a wireless system includes the steps of orthogonally transmitting a plurality of signals utilizing multiple antennas using a corresponding plurality of precoders in a plurality of time slots, which precoders are designed using the channel information to cancel interference among the plurality of signals while achieving a maximum possible diversity of NM with low complexity for at least two users each having N transmit antennas and one receiver with M receive antennas, separating the signals in the receiver using the orthogonality of the transmitted signals, and decoding the signals independently to provide full diversity to the at least two users.

Receiver and method for reducing an amount of channel state information feedback to a transmitter

A receiver and a method are described herein for reducing an amount of channel state information related to a transmit channel correlation matrix φ TX that is feedback to a transmitter. In addition, to a transmitter and a method are described herein for reconstructing the transmit channel correlation matrix φ TX using the reduced channel state feedback information received from the receiver.

Wireless communication device and wireless communication method

A bias of reception qualities between spatial streams to a plurality of terminal devices is suppressed in a multiuser MIMO transmission. A wireless communication device according to the invention is one for performing a spatial multiplexing transmission to the plurality of terminal devices, that includes an additional data area setting section that allocates, as an additional data area, a part of a resource allocation area to which no data addressed to each terminal device of the plurality of terminal devices is allocated among resource allocation areas for the spatial multiplexing transmission which are allocated to each terminal device of the plurality of terminal devices, an additional data generator that generates additional data corresponding to the additional data area allocated by the additional data area setting section, and a transmitter that transmits the data which is addressed to each of the plurality of terminal devices and the additional data.

Packet processing systems and methods

Various packet processing systems and methods are disclosed. One method embodiment, among others, comprises providing a legacy long training symbol (LTS), and inserting subcarriers in the legacy LTS to form an extended LTS (ELTS).

Apparatus for Transmitting and Receiving Data to Provide High-Speed Data Communication and Method Thereof

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

Method and system for providing beamforming feedback in wireless communication systems

Techniques to support beamforming for stations in a wireless network are described. A station may support beamforming with implicit or explicit feedback by having capabilities to transmit and receive sounding frames, responding to training request by sending a sounding frame, and responding to request for explicit feedback. In one explicit beamforming embodiment, the station may send a first frame with an explicit feedback request and may also send a Null Data Packet (NDP) having at least one training field but no data field. The station may receive a second frame with explicit feedback, which may be derived based on the NDP. The station may derive steering information based on explicit feedback and may then send a steered frame with beamforming based on the steering information. Other aspects, embodiments, and features are also claimed and described.

Mobile terminal apparatus, radio base station apparatus, and radio communication method

To provide a radio communication method for enabling a control signal to be received with high quality and high efficiency, in the case of using spatial multiplexing transmission in data signals to transmit, and also transmitting the control signal in the same sub-frame, in the radio communication method of the invention, a mobile terminal apparatus receives a downlink signal including precoding information, separates a data signal and a control signal to assign to different radio resources, and performs MIMO-transmission on a signal of each transmission layer based on the precoding information, and a radio base station apparatus receives an uplink signal including the data signal and the control signal subjected to MIMO transmission, divides the uplink signal into data signals for each transmission layer, and reproduces the control signal from the uplink signal.

Method and device for operating a precoded mimo system

A method is provided for generating precoder data ( 600 ), comprising: obtaining transmit power data indicative of a transmit power of a plurality of multiple-input/multiple-output signals ( 610 ); obtaining signal quality data, the signal quality data including at least one measure of a quality of the plurality of multiple-input/multiple-output signals ( 620, 630 ); obtaining channel data with respect to a wireless channel, the channel data including a measure of respective channel parameters of each of a plurality of channel paths in the wireless channel ( 620, 630 ); constraining one or more system performance parameters ( 640 ); and determining first and second precoder diagonal values (w A and w B ) based on the signal quality data, the transmit power data, the channel data, and the one or more constrained system performance parameters ( 650 ).

Radio transmission control method, radio receiver apparatus, and radio transmitter apparatus

Conventionally, if the number of transmission antennas is greater than that of reception antennas, different signals simultaneously transmitted from the transmission antennas cannot be separated from one another at the receiving end, resulting in a significant degradation of received-signal quality. A transmitter and a receiver each have a plurality of antennas. The transmitter transmits a pilot signal. The receiver receives the pilot signal, calculates transmission-related information corresponding to the pilot signal, selects, based on this calculated information, a transmission signal to be used by the transmitter, and notifies the transmitter of the selected signal. The transmitter selects, from the informed transmission signal, transmission antennas and uses the selected antennas to transmit information signals, so that a signal separation can be easily performed at the receiving end.

Method and apparatus for detecting received signal in wireless communication system

A method for detecting a received signal by a Base Station (BS) in a communication system is provided. The method includes receiving a BandWidth Request (BW REQ) indicator, determining first interference signal streams representing BW REQ messages, determining whether the first interference signal streams include at least one second interference signal stream which is in a null state, determining a first Maximum Likelihood (ML) metric, determining a second ML metric for each of a case where a value of bits constituting each of third interference signal streams except for the at least one second interference signal stream among the first interference signal streams is 1, and calculating a minimum error distance of the BW REQ messages received from Mobile Stations (MSs) based on the first ML metrics and the second ML metrics.

Multiple-input multiple-output (mimo) antenna system

An antenna system includes a multi-port antenna with an active feeding network coupled thereto. The active feeding network applies complex weights to signals received from and transmitted to each port of the multi-port antenna. The complex weights are applied according to eigenvectors corresponding to a Hermitian matrix representation of the multi-port antenna. The Hermitian matrix may be base on such multi-port antenna parameters such as power dissipation, power radiation, real-power flow, volumetric storage of electromagnetic energy, and/or volumetric dissipation of electromagnetic energy. The multi-port antenna yields orthogonal electromagnetic fields in volumes or surfaces of interest in response to the active feeding network excitation.

Method of exploitation of co-channel interference, apparatus and computer program

A method of canceling co-channel interference of a signal received by a mobile station having at least two receiving antennas, in a cellular OFDMA-TDD communication network having a serving base station and at least one interfering base station. The signal is a result of a serving signal transmitted by the serving base station which is distorted by at least one interfering signal transmitted by the interfering base station. The serving signal is transmitted with a first modulation scheme and the interfering signal is transmitted with a second modulation scheme. The method includes: a channel estimation phase delivering channel estimations of the serving signal and the interfering signal; and a MIMO detecting phase, detecting symbols by using the channel estimations of the serving signal and the interfering signal. The MIMO detection phase is realized using a non-linear method which uses the first modulation scheme and the second modulation scheme.

Method and apparatus for antenna diversity in multi-input multi-output communication systems

Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M≧1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V≧M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T≧V. Transmission symbols are generated for the mapped symbols, e.g., based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.

Method of generating adaptive codebook and multiple input multiple output communication system using the adaptive codebook

Provided is a method of generating an adaptive codebook and a multiple input multiple output (MIMO) communication system using the adaptive codebook. A transmitter and a receiver may generate, from a base codebook based on a matrix associated with statistics of a channel matrix, the adaptive codebook maintaining a unitary characteristic. The transmitter may perform scheduling, transmit filter design, and precoding using adaptive codebook based feedback information.

Signaling to protect advanced receiver performance in wireless local area networks (lans)

Certain aspects of the present disclosure relate to techniques that may be used to help control aspects of beamforming by a beamformee. According to certain aspects, a beamformee may be able to signal, to a beamformer, a maximum number of transmit spatial streams to use for single-user beamformed transmissions.

Transmitting Terminal and Transmit Antenna Selecting Method Thereof

A transmitting terminal includes a signal processing unit, M S RF units, M T transmit antennas and a switch unit. The signal processing unit has K precoders for precoding K data streams corresponding to K receiving terminals. The M S RF units output M S up-converted transmit signals based on the precoded K data streams. The switch unit is coupled between the RF units and the transmit antennas and controlled by the signal processing unit for selection of the transmit antennas. The signal processing unit sets the M T transmit antennas as a universal set, calculates a plurality of sum rates corresponding to a plurality of subsets, each subset excluding an i th transmit antenna, according to channel state information, selects the subset with a maximum sum rate as the universal set of a next iteration, and then repeats the calculating and selecting steps until the subset with the maximum sum rate remaining M S transmit antennas.

Method For A canceling Self Interference Signal Using Passive Noise Cancellation For Full-Duplex Simultaneous (in Time) and Overlapping (In Space) Wireless transmission and Reception On The Same Frequency Band

A method for full duplex communication that includes creating a canceling self interference signal using a passive noise cancellation, and attaining full-duplex simultaneous in time and overlapping in space wireless transmission and reception on same frequency band responsive to the step of creating a canceling self interference signal.

Estimating frequency-offsets and multi-antenna channels in mimo ofdm systems

Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequency-selective fading channels. A wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols. The transmitter applies a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, and a modulator outputs a wireless signal in accordance with the blocks of symbols. A receiver receives the wireless signal and estimates the CFO, and outputs a stream of estimated symbols based on the estimated CFO.

Mu-mimo access point and user station including methods for multi-user group management

Embodiments of a MU-MIMO access point, user station and method for multi-user group management are generally described herein. In some embodiments, a MU-MIMO access point may assign a MU group identifier (GID) and a group member index (GMI) to each of a plurality of associated user stations. The MU-MIMO access point may transmit a MU-MIMO transmission that includes a plurality of spatial streams. The MU-MIMO transmission may be destined for the user stations of a single MU group indicated by a GID that is included within the MU-MIMO transmission. A subset of the spatial streams may be intended for each user station of the indicated MU group that is identified by the GID transmitted within the MU-MIMO transmission. A user station may use its assigned GMI along with an N sts field in the MU-MIMO transmission to determine which of the spatial streams to demodulate.

Communication method, and transmitting apparatus and receiving apparatus using that communication method

A transmission apparatus includes a plurality of antennas and a frame configurator that selects, in a first unit time either a first transmitting method which transmits a modulated signal from at least one of the plurality of antennas, or a second transmitting method which transmits a plurality of modulated signals from the plurality of antennas, for a first carrier group arranged for a first terminal and either the first transmitting method or the second transmitting method for a second carrier group arranged for a second terminal. The frame configurator selects, in a second unit time either the first transmitting method or the second transmitting method for the first carrier group arranged for a third terminal and either the first transmitting method or the second transmitting method for the second carrier group arranged for a fourth terminal, wherein each of carrier groups includes one or more sub-carriers.

Joint uplink data processing by plural base stations

Joint uplink processing by plural base stations includes sending, by a serving base station, a request for uplink resources of a second base station for receiving uplink data of a mobile station. The serving base station receives first uplink data from the mobile station, and the serving base station further receives (from the second base station) second uplink data of the mobile station received by the second base station using the uplink resources specified by the request.

Transmit methods with delay diversity and space-frequency diversity

In this invention, several open-loop solutions that encompass the small delay CDD codeword cycling, codeword cycling between different re-transmissions of both small and large delay CDD are proposed. In addition, an open-loop codeword cycling method for SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ, are proposed. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded by using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas.

Methods and apparatus for wireless coexistence based on transceiver chain emphasis

Methods and apparatus for reduction of interference between a plurality of wireless interfaces. In one exemplary embodiment, a device having a first (e.g., Wi-Fi) interface and a second (e.g., Bluetooth) interface monitors interference between its interfaces. A reduction in transmit power of the Wi-Fi module causes a disproportionately larger reduction in undesirable interference experienced at the Bluetooth antennas. For example, when the Bluetooth interface detects interference levels above acceptable thresholds, the Wi-Fi interface adjusts operation of one or more of its transmit chains based on various conditions such as duty cycle, Received Signal Strength Indication (RSSI), etc. Various embodiments of the present invention provide simultaneous operation of WLAN and PAN interfaces, without requiring time division coexistence, by reducing power on a subset of interfering antennas.

Method for transmitting data in multi-user wireless communication system

The present invention particularly relates to a method and an apparatus for improving the efficiency of data transmission in a multi-user wireless transmission system. According to one embodiment of the present invention, the method, which is a transmission method of data in a multi-user wireless communication system, comprises the steps of: estimating channel states of each terminal through sounding or feedback information received from the terminals, and selecting terminals to which individual data are to be transmitted at the same time; determining a signal to noise ratio of the selected terminals, and calculating a precoding matrix; calculating a modulation and coding scheme (MCS) of each terminal and the number of symbols of data fields in accordance with the MCS of each terminal; dividing an area according to the number of terminals to which the data fields are to be simultaneously transmitted, if there are two or more selected terminals; and recalculating a reception signal to interference and noise ratio (SINR) for each area of each terminal, configuring a packet by resetting the MCS according to the recalculated SINR, and transmitting the configured packet.

Method and apparatus for downlink transmission based on mimo precoding in wireless communication system employing distributed antenna systems

A transmission method and apparatus utilizing Multiple-Input and Multiple-Output (MIMO) precoding based on Distributed Antenna Systems (DASs) are provided. The transmission method includes determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) evenly placed in a service area; assigning a Multiple-Input and Multiple-Output (MIMO) mode to the UE and notifying the UE of the MIMO mode assignment; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports.

Communication system, radio base station, and communication control method

A radio base station ( 1 A) generates and holds associations each between a resource block and a piece of MIMO information and allocates, based on the associations, a resource block to radio terminals ( 2 A and 2 C) in the cell ( 3 A). When the radio terminals ( 2 A and 2 C) in the cell ( 3 A) suffers a predetermined level or higher level of interference caused by the communication between another radio base station ( 1 B) and a radio terminal ( 2 B) that exists in the cell ( 3 B) of the other radio base station ( 1 B), the radio base station ( 1 A) selects one of the associations each between a resource block and a piece of MIMO information and allocates, based on the selected association, a resource block to the radio terminals ( 2 A and 2 C) in the cell ( 3 A).

Radio base station and radio communication method

RRHs are physically independent from each other, are arranged in different positions, respectively, receive uplink signals from a radio terminal and transmit downlink signals to the radio terminal. A central processing unit receives the uplink signals from the plurality of RRHs and transmits the downlink signals to the plurality of RRHs. A setting unit sets a part or all of the RRHs as RRH(s) in a first group suitable for transmission of the downlink user data based on the uplink or downlink signals received by at least one of the RRHs. A transmission control unit controls the transmission of the downlink user data from the plurality of RRHs based on the setting.

Downlink 8 Tx Codebook Sub-Sampling for CSI Feedback

This invention is codebook sub-sampling of the reporting of RI, CQI, W 1 and W 2 . If CSI mode 1 is selected RI and W 1 are jointly encoded using codebook sub-sampling in report 1 . If CSI mode 2 is selected W 1 and W 2 are jointly encoded using codebook sub-sampling in report 2.

Method And Apparatus Supporting Improved Wide Bandwidth Transmissions

A method for transmitting information in a wireless system is provided. In this method, the traffic on a plurality of channels can be determined. A bandwidth for a packet can be selected based on the traffic and available channel bandwidths. A modulation and a coding rate can be selected from a plurality of modulations and associated coding rates. The modulation and coding rate can be applied to a segment of the packet, wherein each segment includes one or more bandwidth units. The packet including the selected modulation and coding rate therein can be transmitted on at least one channel

Method and Terminal for Channel State Information Feedback

The present invention discloses a method and terminal for feeding back channel status information, including: when the channel status information is fed back on the physical uplink control channel, code words contained in the used codebook C PUCCH (r) with a layer number or rank being r is a subset of the code words contained in the codebook C PUSCH (r) with a layer number or rank being r in the overall codebook defined in the LTE-A; wherein, the C PUCCH (r) is a single codebook or a single codebook equivalent to dual codebooks; and the C PUSCH (r) is a single codebook or a single codebook equivalent to the dual codebooks; and the single codebook equivalent to the dual codebooks means that the actually used codebook is an actually defined single codebook, however, 2 pre-coding matrix identifiers are required to determine the codebook of the code words therein for an established r. The method described by the present invention can ensure the precision of the PMI feedback under the limited overhead, make the CSI feedback on the PUCCH still be able to more effectively support the pre-coding technology and have good compatibility with the feedback on the PUSCH.

Device, system and method of wireless communication

Briefly, according to embodiments of the invention, there is provided a wireless communication system and a method to receive by a base station from a first mobile station a first chain of data symbols transmitted by at least two antennas and having a first transmit diversity, to receive from a second mobile station a second chain of data symbols transmitted by at least two antennas and having a second transmit diversity. Both first and second chains of data symbols are transmitted from the first and second mobile stations at the same time, modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme and encoded by a space time block codes scheme.

Method and device for pre-coding, and method and device for decoding

The present invention relates to the field of wireless communications technologies, and discloses a method and device for pre-coding and a method and device for decoding. The present invention implements an interference alignment method with excellent performance, can effectively increase the capacity of a multi-user interference system and reduce the mutual interference among users, The method for pre-coding includes: calculating a pre-coding matrix for each transmitting end according to a sum of mean square errors of data vectors to be transmitted by each transmitting ends; and using the pre-coding matrix to pre-code the data to be transmitted by each transmitting end. The present invention has broad application prospects, for example, can be used in LTE and LTE-Advanced CoMP technology.

Spatial spreading in a multi-antenna communication system

Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain N D data symbol blocks to be transmitted in N M transmission spans, where N D ≧1 and N M >1. The N D blocks are partitioned into N M data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via N T transmit antennas in one transmission span. The N D data symbol blocks are thus spatially processed with N M steering matrices and observe an ensemble of channels.

Transmitter for communications system

An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station.

Method and apparatus of system scheduler

Briefly, according to embodiments of the invention, there is provided a wireless communication system and a method to receive by a base station from a first mobile station a first chain of data symbols transmitted by at least two antennas and having a first transmit diversity, to receive from a second mobile station a second chain of data symbols transmitted by at least two antennas and having a second transmit diversity. Both first and second chains of data symbols are transmitted from the first and second mobile stations at the same time, modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme and encoded by a space time block codes scheme.

Communications system using beamforming

In a MIMO communications system a first communications device applies beamforming to a complete transmission packet including both synchronization data and either payload data or training symbols. A second communications device evaluates the beamformed synchronization data and determines and transmits a feedback information indicating minimum required synchronization data and/or a minimum number of training symbols. The first communications device tailors the synchronization data and/or number of training symbols on the basis of the feedback information. Beamforming the complete transmission packet facilitates signal suppression at defined locations. When the channel properties change, the second communications device may provide further channel state information to adapt beamforming in the first communications device without transmission of not beamformed training symbols. The communications system may be a powerline telecommunications system.

Transmission and reception apparatus and method

A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

Method for transceiving signal in mobile station in multiple antenna wireless communication system and apparatus therefor

A mobile station provided with multiple antennas in a wireless communication system is disclosed. More specifically, the mobile station displays an overlap zone entry notification message received from a macro base station if the mobile station enters an overlap zone between the macro base station and a femto base station, and an user selects an antenna driving mode of the multiple antennas. And then, the mobile station transmit and receive signals to and from at least one of the macro base station and the femto base station in accordance with the selected antenna driving mode.

Resource assignments for uplink control channel

A wireless communication method includes allocating physical uplink control channel (PUCCH) data in first slot to a first orthogonal cover code (OCC). The method also includes allocating PUCCH data in a second slot of the same subframe to a different orthogonal cover code (OCC). Another method includes mapping PUCCH resources to physical resource blocks based on a user equipment (UE) specific signaling parameter (e.g., a resource index) and a number of symbols in a slot of a subframe.

Downlink multiple input multiple output enhancements for single-cell with remote radio heads

A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

System and method for simultaneous mimo signal testing with single vector signal analyzer

Signal conversion circuitry and method for converting a multiple input, multiple output (MIMO) packet data signal transmission to a plurality of complex data samples for processing by shared test equipment, e.g., a single vector signal analyzer (VSA).

Mimo detector

A MIMO detector for use in MIMO-OFDM wireless communication that forms a plurality of propagation paths by using a plurality of transmitting and receiving antennas includes: an inverse matrix calculator operating as an inverse matrix calculation unit configured to calculate an inverse matrix of a matrix of the propagation path based on a signal received by a receiver; a detection speed controller operating as an estimation unit configured to estimate a variation in the propagation path over time; and a phase synchronization circuit and a regulator configured to variably control a processing time required to calculate the inverse matrix by the inverse matrix calculator, according to the variation in the propagation path over time estimated by the detection speed controller. The MIMO detector is provided on the side of the receiver of the wireless communication.

Fixed multiple access wireless communication

Disclosed is a user terminal for wireless communication with a remote access point, the user terminal comprising: a mapping module adapted to map one or more input data bits to an uplink symbol; a delay module adapted to apply a delay to the uplink symbol; a transmit module adapted to modulate the delayed symbol into a frequency channel; and a directional antenna oriented along a dominant path to the access point, the antenna being adapted to transmit the modulated symbol to the access point, wherein the delay is chosen such that the transmitted symbol arrives at the access point simultaneously with a further symbol modulated into the frequency channel and transmitted by a further user terminal.

Measurement and feedback calculation for wireless communication network

A method for performing measurement by a radio apparatus is presented. In one embodiment, the method includes determining raw measurements (e.g., a channel estimation and a noise variance estimation) of a subband and determining a rank indicator (RI) without requiring a precoding matrix indicator (PMI) search. The method includes calculating, based at least on the raw measurements, a mean instantaneous capacity (MIC) for the subband and determining a channel quality indicator (CQI) and a PMI based at least on the MIC. In one embodiment, the method uses subband-based measurements for performing feedback/measurement.

System and method for uplink multiple input multiple output transmission

Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In particular, scheduled uplink transmission power is allocated between a primary stream including an E-DPDCH and a secondary stream including an S-E-DPDCH. Specifically, a ratio between the power of the E-DPDCH and a primary pilot channel DPCCH, as well as a ratio between the power of the S-E-DPCCH and an unboosted power of the S-DPCCH, each corresponds to a first traffic to pilot power ratio. Further, the transport block size for a primary transport block provided on the E-DPDCH is determined based on the first traffic to pilot power ratio, while the transport block size for a secondary transport block provided on the S-E-DPDCH is determined based on a second traffic to pilot power ratio.

Method and device for feeding back spatial channel state

A method for feeding back spatial channel state and a device for feeding back spatial channel state are disclosed by the invention. The method for feeding back spatial channel state according to an embodiment of the present invention includes: determining the probability of being scheduled of the spatial channel; determining feedback information based on the probability of being scheduled of the spatial channel; and transmitting the determined feedback information; wherein more feedback information is used for the spatial channel having high probability of being scheduled than that of the spatial channel with low probability of being scheduled.

Ship Based Cellular and Satellite Communication

A ship based cellular and satellite transceiver receives, demodulates and processes data, voice and video signals from a satellite transmitter and provides the processed signals in cascade to a OFDM and to a CDMA modulator and transmitter for transmission to a ship based mobile unit. The OFDM signal is transmitted in a Wi-Fi network and the CDMA signal is transmitted in frequency bands used by cellular phones and cellular connected devices. The ship based transceiver receives from a mobile unit, e.g. from a cellular phone or a computer an OFDM or a CDMA signal generated and transmitted by the mobile unit and receives, demodulates and processes the cellular phone transmitted signal and provides these processed signals for cascade processing, modulation and transmission to a satellite.

System and method for uplink multiple input multiple output transmission

Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In particular, an enhanced pilot reference may be provided for enabling increased data rates on a secondary stream. Specifically, a primary stream, provided on a primary virtual antenna, includes an enhanced primary data channel E-DPDCH, a primary control channel DPCCH, and an enhanced primary control channel E-DPCCH. Further, a secondary stream, provided on a secondary virtual antenna, includes an enhanced secondary data channel S-E-DPDCH and a secondary control channel S-DPCCH. Here, the secondary control channel S-DPCCH may be transmitted at a boosted power level relative to a determined reference power level.

Multiple input multiple output and beam-forming data transmission method and device

The present invention provides a method and system for transmitting Multiple Input Multiple Output (MIMO) beam forming data. The method comprises: performing MIMO coding on data streams to obtain the coded data streams; obtaining weight values W=(W i,j ) Tx×S for beam forming of an antenna array of Tx×S of a transmitting end based on channel information from the antenna array of the transmitting end to antennas of a receiving end, where Tx is the number of transmitting antennas of the transmitting end, S is the number of the MIMO-coded data streams, and S≦Tx; and weighting the coded data streams with the weight values W=(W i,j ) Tx×S for beam forming, and transmitting the weighted data streams by corresponding antennas, where the data transmitted by antenna i is superposed data Σ j=1 S W i,j x j , i=1, . . . , Tx, j=1, . . . , S, and x j is j th coded data stream.

Increased capacity communications for ofdm-based wireless communications systems/methods/devices

Numerous embodiments are provided that may be used to provide enhanced capacity and/or Quality-of-Service for OFDM-based systems such as LTE and/or WiMAX. Various service/device modes and/or applications are also provided. According to embodiments of the invention, a transformation may be performed on a data vector by a transmitter, prior to the transmitter transmitting the data vector, to distribute elements of the data vector over an available frequency space, thus providing robustness to channel anomalies such as fading and/or interference. Embodiments relating to architectures, systems, methods, devices, software, firmware and/or computer program products are provided.

Method and Device for Determining a Cooperation Area

A method and a device for determining a cooperation area for a mobile terminal in a cellular network, wherein the mobile terminal determines its n strongest interferers; wherein the cooperation area is selected for the mobile terminal regarding the n strongest interferers; and wherein the cooperation area includes m base stations and wherein the number m of base stations is larger than the number n of strongest interferers. Furthermore, a communication system is suggested including said device.

Cognitive radio base station and communication method thereof in multi-user multiple-input multiple output cognitive radio network system

A communication method for a cognitive radio (CR) base station in a multi-user multiple-input multiple-output (MIMO) CR communication system including the CR base station and CR terminals, may include calculating, from an interference channel, an orthogonal projection matrix to be used for removing interference on a primary user through use of a zero forcing (ZF) processing scheme, and obtaining a beamforming weight vector for each of the CR terminals, through use of the orthogonal projection matrix.

Antenna Selection For Mimo Decoding

A MIMO decoder is configured to obtain a channel matrix and generate a Hermitian transpose of the channel matrix. A product of the Hermitian transpose of the channel matrix and the channel matrix is generated to provide a first product having multiple diagonal elements. A partial matrix inversion of the diagonal elements of the first product is generated to provide a diagonal vector. From the diagonal vector, an antenna layer is selected from the multiple antenna layers and represents the antenna layer selected for a given processing iteration. The selected antenna layer will preferably correspond to that having the lowest inverse channel gain. A partial matrix inversion of the first product along the row corresponding to the selected antenna layer is generated to provide a row vector. A product of the row vector and the Hermitian transpose of the channel matrix is generated to provide an inverse channel gain vector.

Transmission device, reception device, communication system, and communication method

High transmission efficiency is realized by allowing extension to a number of ports greater than the conventional number of ports through efficient signaling. In a communication system, the highest number of ranks that is the number of spatial multiplex of transmission data transmitted to a terminal device from a base station is 8. The base station generates control information including 3-bit rank information indicating the rank of transmission data, and transmits the transmission data, a reference signal used for demodulating a physical downlink shared channel having the transmission data mapped, and the control information. The terminal device receives the transmission data, the reference signal, and the control information to identify the reference signal using the control information.

Configuration of rank indicator reporting instances

A method for setting a periodicity and an offset in rank indicator (RI) reporting in a user equipment in a wireless communication system receives a radio resource control (RRC) signal from a base station, decodes a RI periodicity and offset configuration index, sets the periodicity and offset in accordance with said decoded periodicity and offset configuration index and reports a RI according to the set periodicity and offset. The periodicity is an integer and reporting a RI reports with equal the product of the periodicity and a period of reporting of the channel quality indicator (CQI) and the precoding matrix indicator (PMI).

Method and user terminal for multi-site multi-user joint transmission

The present invention proposes a method for multi-site multi-user joint transmission, the method comprising: measuring, by a user terminal, a downlink channel originated from each base station; according to the measurement for the downlink channel, quantizing and obtaining, by the user terminal, per-site channel information for the each base station and additional inter-site channel information, the additional inter-site channel information being used for calculating joint channel information of multiple base stations; and feeding back, by the user terminal, the per-site channel information for the each base station and the additional inter-site channel information so that the base station performs scheduling to execute the multi-site multi-user joint transmission.

Multiple input multiple output (mu-mimo) apparatus and methods

A multi-user MIMO downlink beamforming system ( 200 ) is provided to enable transmit beamforming vectors to be efficiently provided to a subset of user equipment devices ( 201. i ), where spatial separation or zero-forcing transmit beamformers (w i ) are computed at the base station ( 210 ) and used to generate precoded reference signals ( 216 ). The precoded reference signals ( 216 ) are fed forward to the user equipment devices ( 201. i ) which apply one or more hypothesis tests ( 207. i, 208. i ) to the precoded reference signals to extract the precoding matrix (W), including the specific transmit beamforming vector (W UE ) designed for the user equipment, and this extracted information is used to generate receive beamformers (v i ).

Method of generating a codebook

A precoding codebook matrix/vector of length 2L is generated by the selection of two matrices/vectors, each from one of a predetermined set of L×L matrices and multiplying each column of one of the matrices/vectors by a complex coefficient.

Transmitter and method for transmitting data block in wireless communication system

Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.