基于并行处理技术的宽带直扩信号捕获方法  

Wideband DS-Signal capture scheme based on parallel processing technology

作　　者：张德智[1] 曾星星[1] 胡倩[1] 

机构地区：[1]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《电子技术应用》2016年第9期10-13,共4页Application of Electronic Technique

摘　　要：针对宽带扩频信号码片码率高达150 Mcps以上,传统扩频快捕处理算法无法适应的技术难题,提出了一种基于信号并行处理技术的快捕算法。算法通过并行NCO(数控振荡器)生成本地伪码、载波,实现600 MHz的等效采样匹配,捕获过程通过内码滑动相关实现内码相位对齐、外码匹配滤波找到外码对齐位置。通过计算、仿真分析表明,本算法资源占用率低、捕获速度快,可实现宽带扩频信号快速捕获。The rate of wideband spread spectrum signal is up to 150 Mcps, which cause the traditional capture method can not work under this rate. A fast algorithm based on parallel signal processing technique is proposed to solve this problem. Local carrier and PN code is generated by means of parallel NCO, which can achieve 600 MHz equivalent sample rate. Inside PN code achieve phase alignment by sliding code phase. Out side PN code achieve phase alignment by match filter. The proposed algorithm is feasi-ble and can achieve fast acquisition of wideband spread spectrum signal.

关 键 词：并行处理 宽带扩频 快速捕获 

分 类 号：TN91[电子电信—通信与信息系统]