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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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Применить Всего найдено 4. Отображено 3.
29-09-2022 дата публикации

METHOD AND SYSTEM FOR GENERATING HIGH-ORDER PSEUDO-RANDOM ELECTROMAGNETIC EXPLORATION SIGNAL

Номер: US20220308838A1

A method and system for generating a high-order pseudo-random electromagnetic exploration signal. The method includes: constructing two or more basic unit signals according to an exploration requirement, where the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, and a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2; and superposing the two or more basic unit signals to obtain superposed stairstep signals, and correcting amplitudes to be consistent with amplitudes of the periodic square wave signals, to obtain high-order 2n sequence pseudo-random signals. The 2n sequence stairstep signals of different orders can be constructed within a limited frequency interval, improving the resolution during electromagnetic exploration.

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29-09-2022 дата публикации

METHOD AND SYSTEM FOR GENERATING LOGARITHMIC NON-UNIFORM PSEUDO-RANDOM ELECTROMAGNETIC EXPLORATION SIGNAL

Номер: US20220308249A1

A method and system for generating a logarithmic non-uniform pseudo-random electromagnetic exploration signal including: constructing two or more basic unit signals, according to an exploration requirement, that are stairstep signals obtained by superposing in-phase periodic square wave signals, a frequency ratio between adjacent periodic square wave signals is 2, and the two or more basic unit signals meet the following requirement: if a lowest dominant frequency in a first basic unit signal is a fundamental frequency, lowest frequencies of the remaining basic unit signal are l×2times the fundamental frequency, where l is an odd number except 1, and m is a natural number; and superposing the two or more basic unit signals to obtain a logarithmic non-uniform 2sequence pseudo-random signal. A logarithmic non-uniform 2sequence stairstep signal is constructed within a limited frequency interval, and requirements of prospectors for a higher frequency density within a specific frequency interval are met. 1. A method for generating a logarithmic non-uniform pseudo-random electromagnetic exploration signal , the method comprising:constructing two or more basic unit signals according to an exploration requirement, wherein{'sup': 'm', 'the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2, and the two or more basic unit signals meet the following requirements: if a lowest frequency of dominant frequencies in a first basic unit signal is denoted as a fundamental frequency, lowest frequencies of the remaining basic unit signal are l×2times the fundamental frequency, and the lowest frequencies of the basic unit signals differ from each other, wherein l is an odd number except 1, and m is a natural number; and'}{'sup': 'n', 'superposing the two or more basic unit signals to obtain a logarithmic non-uniform 2sequence ...

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14-05-2024 дата публикации

Method and system for generating high-order pseudo-random electromagnetic exploration signal

Номер: US11983511B2

A method and system for generating a high-order pseudo-random electromagnetic exploration signal. The method includes: constructing two or more basic unit signals according to an exploration requirement, wherein the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, and a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2; and superposing the two or more basic unit signals to obtain superposed stairstep signals, and correcting amplitudes to be consistent with amplitudes of the periodic square wave signals, to obtain high-order 2n sequence pseudo-random signals. The 2n sequence stairstep signals of different orders can be constructed within a limited frequency interval.

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