Fast Acquisition Scheme of the Spread Spectrum Signals for Satellite Communications

Rao H.; Liang X. F.; Shen M.; An J. S.

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Fast Acquisition Scheme of the Spread Spectrum Signals for Satellite Communications

机译：用于卫星通信扩频信号的快速采集方案

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摘要

A four-channel parallel acquisition scheme combining partial matched filters and fast Fourier transforms (PMF-FFT) is proposed for the fast acquisition of the spread spectrum signals in satellite communication terminals installed into the offshore buoys with the high-dynamic movement, which is used tofinish data communication missions between the buoys and the satellite. Compared with traditional code phase FFT scheme, the new scheme reduces the maximum acquisition time to 26.5% and the maximum computation amount to 46.9%. It also improves about 4 times in the frequency resolution and 1.6 dB in the receiving sensitivity at the expense of computation complexity compared to PMF-FFT scheme. The parallel PMF-FFT scheme greatly reduces scallop loss, thus ensuring acquisition sensitivity. The parallel PMF-FFT scheme within the satellite communication terminal can ensure the fast and stable tracking of satellite signal by the violently moving antenna within 20 ms under level-4 sea state.

机译：提出了一种组合部分匹配滤波器和快速傅里叶变换（PMF-FFT）的四通道并行采集方案，用于快速采集卫星通信端子中安装到近海浮标中的扩频信号，其使用高动态移动在浮标和卫星之间进行补充数据通信任务。与传统代码阶段FFT方案相比，新方案将最大采集时间降至26.5％，最大计算量为46.9％。与PMF-FFT方案相比，它还在频率分辨率中提高了大约4次的频率分辨率和1.6dB，以计算复杂性的费用。平行PMF-FFT方案大大减少了扇贝损失，从而确保了采集敏感性。卫星通信终端内的并联PMF-FFT方案可以通过在4级海状态下，通过剧烈的移动天线确保卫星信号的快速和稳定跟踪。

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《NTT R&D》 |2020年第4期|449-456|共8页
作者
Rao H.; Liang X. F.; Shen M.; An J. S.;
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Chinese Acad Sci Natl Space Sci Ctr Beijing 100190 Peoples R China|Univ Chinese Acad Sci Beijing 100190 Peoples R China;

Chinese Acad Sci Natl Space Sci Ctr Beijing 100190 Peoples R China;

Aalborg Univ Dept Elect Syst DK-9220 Aalborg Denmark;

Chinese Acad Sci Natl Space Sci Ctr Beijing 100190 Peoples R China;

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1. High-sensitivity acquisition of ultrahigh dynamic direct sequence spread spectrum signals in space communications [J] . Ying Xu, Hong Yuan Communications, China . 2013,第10期

机译：空间通信中超高动态直接序列扩频信号的高灵敏度采集
2. A Modified Sequential Acquisition Scheme in Direct-Sequence Spread-Spectrum Communications Over a Fading Channel [J] . Jia-Chin Lin IEICE Transactions on Communications . 2000,第10期

机译：衰落信道上直接序列扩频通信中的一种改进的顺序采集方案
3. Fast Acquisition of Spread Spectrum Signals Using Multiple GPUs [J] . Liu Ying, Cui Hongyuan, Zhao Renliang IEEE Transactions on Aerospace and Electronic Systems . 2019,第6期

机译：使用多个GPU快速获取扩频信号
4. Design and Realization of Fast Code Acquisition for Long PN Code Spread Spectrum Communication in LEO Satellite [C] . CHEN Yong, ZHAO Hang-sheng 第四届国际通信、电路与系统学术会议 . 2006

机译：LEO卫星长PN码扩频通信快速码捕获的设计与实现。
5. Fast and power-efficient synchronization of direct-sequence spread spectrum signals. [D] . Namgoong, Won. 1999

机译：直接序列扩频信号的快速，高效节能同步。
6. An Acquisition Scheme Based on a Matched Filter for Novel Communication and Navigation Fusion Signals [O] . Zhongliang Deng, Jun Mo, Buyun Jia, 2017

机译：基于匹配滤波器的新型通信导航融合信号采集方案
7. Acquisition of Direct Sequence Spread Spectrum Acoustic Communication Signals [O] . M. Stojanovic, L. Freitag 2011

机译：直接序列扩频声通信信号的采集

Fast Acquisition Scheme of the Spread Spectrum Signals for Satellite Communications

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