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一种基于协同侦收的卫星上/下行信号关联方法
陈文洁,梁先明,史高翔
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(中国西南电子技术研究所，成都 610036;解放军驻成都地区第三军事代表室，成都610041)

摘要:

针对移动卫星L频段上行信号侦收覆盖范围小导致难以监测广大区域用户上行通信行为的问题，提出了一种基于协同侦收的卫星上/下行信号关联方法。通过构建协同侦收方案，实现卫星通信过程中返向链路的L频段上行信号、C频段下行信号与前向链路的L频段下行信号的协同接收，之后综合利用卫星随机接入信道（Satellite Random Access Channel，SRACH）和卫星访问授权信道（Satellite Access Grant Channel，SAGCH）的信号外部特征和信息内涵进行L频段上行信号和C频段下行信号之间关联分析，最终得到一种可用于关口站信号侦收的卫星上/下行信号关联方法。实验验证结果表明，所提方法具备可行性，可为后续开展基于大站的卫星信号通联分析提供技术支撑。

关键词: 移动卫星通信协同侦收卫星随机接入信道卫星访问授权信道上/下行信号关联

DOI：

基金项目:

An association method for satellite's uplink and downlink signals based on cooperative reconnaissance

CHEN Wenjie,LIANG Xianming,SHI Gaoxiang

(Southwest China Institute of Electronic Technology,Chengdu 610036,China;The Third Military Representative Office of PLA for Chengdu Region,Chengdu 610041,China)

Abstract:

Signal reconnaissance of mobile satellites Lband uplink covers small areas,resulting in difficulty in monitoring the uplink behavior of users over a wide area.To solve the problem,an association method for satellites uplink and downlink signals is presented,which is based on cooperative reconnaissance.By building a cooperative reconnaissance project,the satellite communication signal is received,including the Lband uplink signal and the Cband downlink signal in the return link,and the Lband downlink signal in the forward link.Then,the association analysis of Lband uplink signal and Cband downlink signal is studied by using both satellite random access channel(SRACH) and satellite access grant channel(SAGCH) signals external characteristic and information content together.Finally,an association method for satellite uplink and downlink is proposed,which can be used for gateway reconnaissance.The experimental result shows that,the presented solution is feasible,and it can provide technical support for the further satellite signal communication analysis based on gateway.

Key words: mobile satellite communication cooperative reconnaissance satellite random access channel(S RACH) satellite access grant channel(S AGCH) association of uplink and downlink