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。
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.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第7期1649-1653,共5页
Journal of Electronics & Information Technology
基金
国家自然科学基金
中国工程物理研究院联合基金(10676006)资助课题
关键词
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
Signal processing
Direct Sequence Spread Spectrum(DSSS) signal
Chip rate
Split-Symbol Moments Estimator(SSME)
Signal-to-Noise Ratio(SNR)