| 直扩信号伪码的盲估计方法的研究 |
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| 引用本文： | 秦怡,田斌.直扩信号伪码的盲估计方法的研究[J].现代电子技术,2007,30(3):54-56,59. |
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| 作者姓名： | 秦怡 田斌 |
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| 作者单位： | 西安电子科技大学,综合业务网国家重点实验室,陕西,西安,710071 |
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| 摘 要： | 对直接序列扩频通信的信号检测方法进行了综述,重点讨论了自相关域检测方法、四阶累积量方法、谱分析与信号子空间分解法,其中四阶统积量方法和谱分析与信号子空间分解法的最低检测门限远低于相关算法,谱分析与信号子空间分解法在直接序列扩频(DS/SS)信号的伪码周期估计以及伪码序列盲估计中,利用功率谱二次处理结合信号子空间分解的方法可以实现对低信噪比DS/SS信号的估计。
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| 关 键 词： | 直接序列扩频(DS/SS)信号 盲解扩 伪码序列 信号估计 |
| 文章编号： | 1004-373X（2007）03-054-03 |
| 收稿时间： | 2006-09-25 |
| 修稿时间： | 2006-09-25 |
Study on the DS/SS Signals Despreading without the PN Sequence |
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| QIN Yi,TIAN Bin.Study on the DS/SS Signals Despreading without the PN Sequence[J].Modern Electronic Technique,2007,30(3):54-56,59. |
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| Authors: | QIN Yi TIAN Bin |
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| Abstract: | This paper reviews the detection methods for direct sequence spectrum spread communications.The self-correlated detection,fourth-order cumulant detection and the method utilizing the reprocessing of power spectrum and the subspace of DS/ SS signal are mainly considered in this paper.The fourth-order cumulant detection and the method utilizing the reprocessing of power spectrum and the subspace of DS/ SS signal can work well on lower SNR input signals.This paper focuses mainly on the methods utilizing 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. |
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| Keywords: | Direct Sequence Spread Spectrum(DS/SS) signal spread-spectrum despreading without the code pseudo noise sequence signal estimation |
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