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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 8. Отображено 8.
25-03-2015 дата публикации

Self-adaptive coding modulation beam switching method for mobile broadband satellite communication system applied to high-speed railway

Номер: CN104468032A
Автор: XIN XIANGJUN, ZHANG QI, TIAN QINGHUA, LIU NAIJIN, CAO GUIXING, CHEN DONG, CHEN TIANSHUANG
Принадлежит:

The invention discloses a self-adaptive modulation coding beam switching method for a mobile broadband satellite communication system applied to a high-speed railway. The method includes the steps that A, reference threshold values, corresponding to all self-adaptive modulation coding modes, of the signal to noise ratio are determined, according to the channel state information-the receiving signal to noise ratio of the current mobile broadband satellite channel, errors between the value of the receiving signal to noise ratio and the reference threshold values, corresponding to the self-adaptive modulation coding modes, of the signal to noise ratio are calculated, according to the sizes of the errors, the value of the average signal to noise ratio at the receiving end is corrected at different degrees, and the corresponding modulation coding mode is determined according to the size of the average signal to noise ratio obtained through correction; B, if the value of the average signal to ...

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Номер записи: 1
10-09-2014 дата публикации

Satellite network self-adaption joint spectrum sensing method based on link sensing

Номер: CN104038298A
Автор: XIN XIANGJUN, ZHANG QI, TAO YING, TIAN QINGHUA, LIU NAIJIN, CAO GUIXING, FENG XUAN, CHEN DONG, FAN JUNNAN, ZHANG LIJIA, MA WENJIN
Принадлежит:

The invention discloses a satellite network self-adaption joint spectrum sensing method based on link sensing. By means of the method, two judgment threshold values (one high threshold value and one low threshold value) are figured out according to current satellite link parameters which are obtained by a link sensing technology, energy of a to-be-detected signal is calculated according to an energy detecting method and compared with the two threshold values, if the energy is larger than or equal to the high value, a master user signal is determined to exist, if the energy is smaller than or equal to the low value, the master user signal is determined to be absent, if the energy is between the two judgment threshold values, the signal is subjected to cyclic stationary characteristic detection. According to the satellite network self-adaption joint spectrum sensing method based on link sensing, the link sensing technology is introduced to spectrum sensing, the technology can help real-timely ...

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Номер записи: 2
26-03-2014 дата публикации

Broadband satellite communication system and method based on satellite-borne IP switching

Номер: CN103685023A
Автор: TAO YING, ZHOU RUI, LIU NAIJIN, FENG XUAN, GAO ZIHE, LIANG ZONGCHUANG
Принадлежит:

The invention discloses a broadband satellite communication system and method based on satellite-borne IP switching. The communication system includes a broadband communication satellite with an satellite-borne IP switching function, a system network management control center, a gateway station and a satellite terminal; the broadband communication satellite with the satellite-borne IP switching function carries out IP switching on a satellite; the system network management control center is cooperated with the gateway station and the satellite terminal, so as to realize maintenance and distribution of routing switching information of the broadband satellite communication system based on the satellite-borne IP switching; the satellite terminal and the gateway station, according to switching label information distributed by the system network management control center, carries out packaging and unpacking processing of an access service data packet so as to realize transmitting and receiving ...

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Номер записи: 3
01-07-2015 дата публикации

Deep space communication simulation demonstration verifying method and deep space communication simulation demonstration verifying system

Номер: CN104753740A
Автор: GAO ZIHE, TAO YING, LIU NAIJIN, CAO GUIXING
Принадлежит:

The invention relates to a deep space communication simulation demonstration verifying method and a deep space communication simulation demonstration verifying system. The deep space communication simulation demonstration verifying system comprises a route and control center, a scene simulating module, a channel simulating module, a transmission control simulating module and a wireless transmission simulating module. A specific simulating process comprises a simulation scene configuration stage, a simulation node adding stage and a simulation data interaction stage. System design and establishment can be carried out by a modular idea. The deep space communication simulation demonstration verifying system has the advantages of high flexibility and high expansibility. Collaborative key technical simulation and data transmission demonstration of a physical layer and a transmitting layer in a deep space communication environment can be implemented.

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Номер записи: 4
11-03-2015 дата публикации

Task-oriented ad hoc network algorithm in combination with satellite node availability in satellite network

Номер: CN104410443A
Автор: TIAN QINGHUA, XIN XIANGJUN, ZHANG QI, TAO YING, LIU NAIJIN, CAO GUIXING, QI XIAOHANG
Принадлежит:

The invention discloses a task-oriented ad hoc network algorithm in combination with satellite node availability in the satellite network. The method comprises steps that: A, task-oriented initial link weight is calculated according to demands of business for transmission time delay, residual bandwidth, time delay jittering and the packet loss ratio; B, availability weight of satellite nodes is calculated according to a busyness level of the satellite nodes, satellite types and a relative movement speed in the satellite network; C, an integrated link transmission cost is calculated through combining the task-oriented initial link weight and the availability weight of the satellite nodes at two link ends; and D, routing is carried out based on the integrated link transmission cost, links and the satellite nodes satisfying the business demands are selected, business QoS demands are guaranteed, and validity and stability of a transmission path are further realized. The method can realize the ...

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Номер записи: 5
09-04-2008 дата публикации

Limiting feedback precoding interference suppression method of multi-antenna multi-cell system

Номер: CN0101159462A
Автор: LIU NAIJIN, QIU LING, ZHU JINKANG, NAIJIN LIU, LING QIU, JINKANG ZHU
Принадлежит:

The invention discloses a limited-feedback precoding interference-suppression method in a multi-antenna multi-cell system. The transmitting terminal has a base station, the receiving terminal has a mobile user, and both the base station and the user are equipped with an identical codebook collection; at the receiving terminal, the mobile user firstly measures the interference channel between the mobile user-self and the co-frequency base station of the adjacent cell, then qualifies the interference channel by using the codebook collection, and feedbacks the qualified data to the base station of the adjacent cell; at the transmitting terminal, the base station of the adjacent cell uses the feedback data to perform the precoding processing, generates a percoded matrix, and then suppresses the interference to other cells caused by the adjacent cell; when all the base station in the multi-cell system use the same processing method, the co-frequency interference in the system will be effectively ...

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Номер записи: 6
23-06-2023 дата публикации

Construction method of low-orbit constellation transmission and calculation fusion network and task unloading method

Номер: CN116318337A
Автор: LIU NAIJIN, CAO JIAQI, CHEN QINGXIA, WANG HOUTIAN, ZHANG SHENGLI
Принадлежит:

The invention relates to a construction method of a low-orbit constellation transmission and calculation fusion network and a task unloading method, and the method comprises the steps: obtaining a low-orbit constellation, carrying out the modeling of the low-orbit constellation, obtaining a dynamic low-orbit constellation model, constructing a virtual copy for the dynamic low-orbit constellation model, building the connection between the dynamic low-orbit constellation model and the virtual copy based on a meta-graph, and carrying out the construction of the low-orbit constellation transmission and calculation fusion network. And obtaining a low-orbit constellation transmission and calculation fusion network. Based on this, organic combination of multiple types of networks is realized, and the task unloading path limitation of various tasks is broken through. And after a connection link of the dynamic low-orbit constellation model, the virtual copy and the task in the low-orbit constellation ...

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Номер записи: 7
26-03-2014 дата публикации

Cross-layer dynamic self-adapting routing method based on LEO satellite network

Номер: CN103685025A
Автор: GAO ZIHE, WANG HOUTIAN, LIU NAIJIN, TAO YING, ZHANG QI, FENG XUAN
Принадлежит:

The invention relates to a cross-layer dynamic self-adapting routing method based on an LEO satellite network. According to the cross-layer dynamic self-adapting routing method based on the LEO satellite network, through overall consideration of the transmission delay, the network link utilization rate and the network link quality of a data packet, the link weight is defined, an optimization model is established, and solving is conducted on the optimization model based on an ant colony algorithm. According to concrete realization of the cross-layer dynamic self-adapting routing method, a mobile agent is used for collecting routing information autonomously, a routing decision can be made in the stage of route establishment through the information of a physical layer, and an ant routing probability value is changed dynamically according to the link quality of the satellite network. By the adoption of the cross-layer dynamic self-adapting routing method, under the condition that the transmission ...

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Номер записи: 8