| 一种低信噪比下PN码的快速捕获技术 |
| |
| 引用本文： | 曾海彬,王天宝.一种低信噪比下PN码的快速捕获技术[J].成都信息工程学院学报,2009,24(2):126-128. |
| |
| 作者姓名： | 曾海彬 王天宝 |
| |
| 作者单位： | 成都信息工程学院通信工程学院,四川,成都,610225 |
| |
| 摘 要： | 直扩系统中,为了硬件实现的简便,PN码的捕获一般都采用串行搜索的方法.但当PN码很长时,由于搜索相位点很多,串行搜索法将使捕获时间过长.并且当信噪比较低时,会有较高的虚警概率.这些都会使系统的捕获性能降低.提出一种基于匹配滤波器的快速捕获算法,改善了在极低信噪比下的性能.降低了平均捕获时间.
|
| 关 键 词： | 直扩系统 PN码 匹配滤波器 平均捕获时间 |
A fast acquisition technique of long PN code with low signal-to-noise ratio |
| |
| ZENG Hai-bin,WANG Tian-bao.A fast acquisition technique of long PN code with low signal-to-noise ratio[J].Journal of Chengdu University of Information Technology,2009,24(2):126-128. |
| |
| Authors: | ZENG Hai-bin WANG Tian-bao |
| |
| Institution: | ZENG Hai-bin,WANG Tian-bao(School of Electronic Engineering,CUIT,Chengdu 610225,China) |
| |
| Abstract: | In order to simplify the hardware implementation in DS-SS system the serial search(SSA) to synchronize the PN code is adopted usually.But when the PN code is very long the SSA spends more time because there are many phase position to be compared.Especially when the signal-to-noise ratio is very low the false alarm probability is very high.All these factors strongly debase the acquisitive performance.In order to shorten the PN code acquisition time the scheme based on the match filter is presented.The simula... |
| |
| Keywords: | direct sequence spread spectrum system PN code match filter average acquisitive time |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
