| 一种直扩信号伪码周期及序列的盲估计方法 |
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| 引用本文： | 张天骐,林孝康,周正中.一种直扩信号伪码周期及序列的盲估计方法[J].电波科学学报,2005,20(3):400-405. |
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| 作者姓名： | 张天骐 林孝康 周正中 |
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| 作者单位： | 清华大学深圳研究生院,广东,深圳,518055;电子科技大学通信学院140室,四川,成都,610054 |
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| 摘 要： | 论述了功率谱二次处理理论和信号子空间分解方法在直接序列扩频(DS/SS)信号的伪码周期估计以及伪码序列盲估计中的应用,提出了利用功率谱二次处理结合信号子空间分解的方法以实现对低信噪比DS/SS信号的完全估计.计算机模拟结果表明,该方法在较低的输入信噪比条件下能良好地工作.
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| 关 键 词： | 直接序列扩频(DS/SS)信号 伪码(PN)周期 伪码序列 功率谱 信号子空间 |
| 文章编号： | 1005-0388(2005)03-0400-06 |
| 修稿时间： | 2004年3月3日 |
A new method for periodic and sequence estimation of the PN code in the lower SNR DS/SS signals |
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| ZHANG Tian-qi,LIN Xiao-kang,ZHOU Zheng-zhong.A new method for periodic and sequence estimation of the PN code in the lower SNR DS/SS signals[J].Chinese Journal of Radio Science,2005,20(3):400-405. |
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| Authors: | ZHANG Tian-qi LIN Xiao-kang ZHOU Zheng-zhong |
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| Abstract: | The problem of blind estimation in a DS/SS(direct sequence spread spectrum) system when there is no knowledge of the PN(pseudo noise) spreading sequence is considered in this paper. The proposed method utilize the reprocessing of power spectrum and the subspace of DS/SS signal to realize the periodic and sequence blind estimation of pseudo noise(PN) sequence from the lower signal to noise ratios(SNR) DS/SS signals. The theoretic analysis and computer simulation show that these methods can work well on the lower SNR input signals. |
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| Keywords: | DS/SS(direct sequence spread spectrum) signal PN(pseudo noise) sequence power spectrum subspace of signal |
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