| 基于SSME的DS/SS信号码速率估计算法 |
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| 引用本文： | 彭艳华, 唐斌, 吕明. 基于SSME的DS/SS信号码速率估计算法[J]. 电子与信息学报, 2010, 32(7): 1649-1653. doi: 10.3724/SP.J.1146.2009.01026 |
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| 作者姓名： | 彭艳华 唐斌 吕明 |
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| 作者单位： | 电子科技大学电子工程学院,成都,610054;电子科技大学电子工程学院,成都,610054;电子科技大学电子工程学院,成都,610054 |
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| 基金项目： | 国家自然科学基金和中国工程物理研究院联合基金(10676006)资助课题 |
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| 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。
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| 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 |
| 收稿时间： | 2009-07-20 |
| 修稿时间： | 2010-02-04 |
Chip Rate Estimation of the DS/SS Signal Based on SSME Algorithm |
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| Peng Yan-hua, Tang Bin, Lü Ming. Chip Rate Estimation of the DS/SS Signal Based on SSME Algorithm[J]. Journal of Electronics & Information Technology, 2010, 32(7): 1649-1653. doi: 10.3724/SP.J.1146.2009.01026 |
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| Authors: | Peng Yan-hua Tang Bin Lü Ming |
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| Affiliation: | School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| 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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| Keywords: | Signal processing Direct Sequence Spread Spectrum (DSSS) signal Chip rate Split-Symbol Moments Estimator (SSME) Signal-to-Noise Ratio (SNR) |
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