| 一种低信噪比下长伪码序列快速捕获方法 |
| |
| 引用本文： | 徐定杰,赵国清,祖秉法. 一种低信噪比下长伪码序列快速捕获方法[J]. 大连海事大学学报(自然科学版), 2009, 35(1) |
| |
| 作者姓名： | 徐定杰 赵国清 祖秉法 |
| |
| 作者单位： | 哈尔滨工程大学,自动化学院,哈尔滨,150001 |
| |
| 摘 要： | 为解决低信噪比下长伪码序列快速捕获问题,提出一种基于迭代消息传递算法的快速捕获方法.通过证明m序列是一种特殊的线性分组码,将m序列用Tanner型因子图表示,然后在得到的图模型上迭代运行消息传递算法来估计m序列的初始相位.在低信噪比下的分析和仿真结果均表明:该算法能稳定工作.相比混合捕获算法,其检测性能下降了大约5 dB,但其平均捕获时间约为同条件下混合捕获方法的1/10,其计算复杂度仅为传统捕获算法的几十分之一.
|
| 关 键 词： | 长伪码序列 快速捕获 迭代消息传递算法(iMPA) 因子图 |
A rapid acquisition for long PN code under low SNR |
| |
| XU Ding-jie,ZHAO Guo-qing,ZU Bing-fa. A rapid acquisition for long PN code under low SNR[J]. Journal of Dalian Maritime University, 2009, 35(1) |
| |
| Authors: | XU Ding-jie ZHAO Guo-qing ZU Bing-fa |
| |
| Affiliation: | XU Ding-jie,ZHAO Guo-qing,ZU Bing-fa(College of Automation,Harbin Engineering University,Harbin 150001,China) |
| |
| Abstract: | A rapid acquisition based on iterative message passing algorithm(iMPA) was developed to solve the problem of rapid acquisition for a long pseudorandom(PN) code under low SNR.Tanners' factor graph was used to represent the m sequence via demonstrating that m sequence is a sort of especial linear block code,and then the message passing algorithm was executed iteratively to estimate the original phase of the received m sequence over the graph model.Both analysis and simulation results show that the rapid acqui... |
| |
| Keywords: | long pseudorandom(PN) code rapid acquisition iterative message passing algorithm(iMPA) factor graph |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
