| 直序扩频通信中码元同步的快速捕获 |
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| 引用本文： | 宫二玲,王跃科,杨俊.直序扩频通信中码元同步的快速捕获[J].通信学报,2003,24(11):34-39. |
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| 作者姓名： | 宫二玲 王跃科 杨俊 |
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| 作者单位： | 国防科技大学,机电工程与自动化学院,湖南,长沙,410073 |
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| 摘 要： | 讨论基于软件无线电技术的直序扩频通信码元捕获的快速算法。利用PN序列尖锐的自相关特性,通过中频接收信号与本地匹配滤波器的循环相关完成码元捕获,给出了循环相关的两种快速算法,并分析了正确捕获概率及平均捕获时间。特别适用于信噪比较低、对设备体积及功耗限制严格的通信系统中
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| 关 键 词： | 直接序列扩频 码元同步 快速捕获 软件无线电 |
| 文章编号： | 1000-436X(2003)11-0034-06 |
| 修稿时间： | 2002年9月27日 |
Fast algorithms of code acquisition for DS/SS |
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| GONG Er-ling,WANG Yue-ke,YANG Jun.Fast algorithms of code acquisition for DS/SS[J].Journal on Communications,2003,24(11):34-39. |
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| Authors: | GONG Er-ling WANG Yue-ke YANG Jun |
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| Abstract: | Fast algorithms of code acquisition for DS/SS are presented based on Software Radio. Code acquisition can be done through cycle-correlation between received IF signal and local matched filter, using the auto-correlation's sharp characteristic of PN sequence. Two fast algorithms for cycle-correlation are given, their correct acquisition probabilities and average acquisition times are analyzed. These algorithms can especially be used when the SNR is low and the size and power of instruments are strictly limited. |
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| Keywords: | DS/SS code synchronization fast acquisition software radio |
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