基于SSME的DS/SS信号码速率估计算法

彭艳华; 唐斌; 吕明

doi:10.3724/SP.J.1146.2009.01026

基于SSME的DS/SS信号码速率估计算法

doi: 10.3724/SP.J.1146.2009.01026

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出版历程
- 收稿日期: 2009-07-20
- 修回日期: 2010-02-04
- 刊出日期: 2010-07-19

Chip Rate Estimation of the DS/SS Signal Based on SSME Algorithm

摘要

摘要: 针对直接序列扩频(DS/SS)信号的码速率盲估计问题，该文提出了一种基于分离符号矩估计(SSME)的新算法。在加性高斯白噪声(AWGN)背景下，通过分析直扩信号符号速率和码片速率以及码片速率与信噪比之间的关系，论证了该算法的有效性。计算机仿真结果表明，该算法在较低的信噪比下可正确地估计出直扩信号码片速率，且可通过增加采样数据长度来提高码片速率估计的精度。
- 信号处理; 直接序列扩频信号; 码速率; 分离符号矩估计; 信噪比
Abstract: A new algorithm based on Split-Symbol Moments Estimator (SSME) is provided in this paper to estimate blindly the chip rate of Direct Sequence Spread Spectrum (DS/SS) signal. The effectiveness of this algorithm is verified by analyzing the relationship between the symbol rate and chip rate, and the relationship between chip rate and Signal-to-Noise Ratio (SNR) in Additive White Gaussian Noise (AWGN). Computer simulation shows that this algorithm can estimate the chip rate successfully in low SNR and can enhance the accuracy of the chip rate estimation by increasing the length of the processed sampling data.

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