| 直接序列扩频信号PN序列盲估计方法 |
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| 引用本文： | 罗军辉,姬红兵,江莉. 直接序列扩频信号PN序列盲估计方法[J]. 电子科技大学学报(社会科学版), 2008, 0(4) |
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| 作者姓名： | 罗军辉 姬红兵 江莉 |
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| 作者单位： | 西安电子科技大学电子工程学院; |
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| 摘 要： | 在非协作信息侦测情况下,提出了一种实用的直接序列扩频(DS-SS)通信信号PN码序列的快速盲估计方法。该方法根据DS-SS基带信号的特点,首先采用二阶循环统计量估计PN码周期,然后利用分段互相关平均估计PN码同步始点;并在准确预估计这2个参数的基础上,将接收信号以PN码周期分成多个时段,利用多重互相关方法估计PN码序列。理论分析与仿真表明,该方法在截获信号信噪比很低的情况下有很好的估计性能,且无需任何先验知识,对PN码码型也没有任何限制,是一种有效的快速盲估计方法。
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| 关 键 词： | 循环自相关 直接序列扩频信号 伪随机序列 码周期估计 |
Blind Estimation of PN Sequence of a Direct Sequence Spread Spectrum Signal |
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| Abstract: | An efficient method that can blindly estimate and synchronize to PN sequence of direct sequence spread spectrum (DS-SS) signal quickly is presented in a non-cooperative context. The method is based on the character of the DS-SS signal, firstly the period of PN sequence is estimated with a second-order cyclic-cumulant, and then the method of segmented cross-correlation is used to identify the synchronous start bit of the PN codes. The intercepted signal is divided into windows, from which the cross-correlati... |
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| Keywords: | cycli-autocorrelation DS-SS signal PN code sequence sequence period estimation |
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