摘要
为了缩短多通道直接序列扩频信号的捕获时间,提出了一种新的多通道并行捕获算法.该算法将多个通道的伪码序列进行叠加,形成一个新的伪码序列,由新的伪码序列和多通道直扩信号进行相关,检测到信号后再判决具体通道.分析和仿真结果均表明,提出的算法在不增加实现资源的情况下,以少量降低相关信噪比为代价缩短了捕获时间,适用于多通道直扩信号的快速捕获.
In order to shorten the acquisition time of multichannel combined acquisition,a new parallel acquisition algorithm is proposed.Several code sequences are added as a new code sequence.The input signal is correlated with the new code sequence.After detection of input signal,each channel would be detected again.Analysis and simulation results showed that the new parallel acquisition algorithm can effectively shorten the acquisition time without increasing resources.But the new parallel acquisition algorithm decreases correlation signal noise ratio（SNR） slightly which is suitable for multichannel signals＇ fast acquisition.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2010年第2期202-205,共4页
Transactions of Beijing Institute of Technology
基金
国家"八六三"计划项目(1010021310XXX)
关键词
直接序列扩频
并行捕获
相关信噪比
direct sequence spread spectrum
parallel acquisition
correlation signal noise ratio
