三种PCMA返回信号捕获方案分析与比较  

Analysis and Comparison of Three Methods for PCMA Return Signal Acquisition

作　　者：潘申富[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2011年第2期13-15,共3页Radio Engineering

摘　　要：成对载波多址(Paired Carrier Multiple Access,PCMA)是一种共频谱卫星通信方式,为了解调对端信号,必须先捕获并消除本站发射的返回信号,该站返回信号捕获是其关键技术之一。针对直接捕获、基于时间窗的捕获以及基于前导码辅助的捕获3种捕获方式进行了详细的分析,分析结果表明,基于前导码辅助的捕获方式具有最短的捕获时间。PCMA is a bandwidth-shared satellite communication scheme, To demodulate the interesting signal transmitted by the remote station, the receiver must capture and eliminate the return signal transmitted hy the local station, so acquisition of the return signal is one of the key technologies of the PCMA modem. This paper deeply analyzed three acquisition methods of direct acquisition, the acquisition based on time window and the preamble-aided acquisition, Analysis results showed that the preamble-aided acquisition method have great advantage of the shortest acquisition time.

关 键 词：PCMA卫星通信 捕获 短码辅助 前导码 

分 类 号：TN919.34[电子电信—通信与信息系统]