| 长码直扩信号的符号速率盲估计方法 |
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| 引用本文： | 徐海源,王丰华,黄知涛,周一宇.长码直扩信号的符号速率盲估计方法[J].国防科技大学学报,2007,29(6):44-48. |
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| 作者姓名： | 徐海源 王丰华 黄知涛 周一宇 |
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| 作者单位： | 国防科技大学,电子科学与工程学院,湖南,长沙,410073 |
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| 基金项目： | 国家部委基金资助项目，国防科技大学校预研基金项目 |
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| 摘 要： | 针对长码直接序列扩频(DSSS)信号的符号速率估计的难题,提出了基于相关处理的方法。该方法首先估计长码直扩信号的相关函数二阶矩,然后将相关函数二阶矩的估计作为输入信号进行预处理,以去除扩频码周期处的峰值。对预处理后的信号再次进行自相关处理,则所得的信号的频谱中含有符号速率谱线。理论分析和计算机仿真证明了所提出的算法的有效性。
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| 关 键 词： | 参数估计 相关函数二阶矩 符号速率 长码直扩信号 |
| 文章编号： | 1001-2486(2007)06-0044-05 |
| 收稿时间： | 2007/4/15 0:00:00 |
| 修稿时间： | 2007年4月15日 |
Blind Estimation of the Symbol Rate of a Long Code DSSS Signal |
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| XU Haiyuan,WANG Fenghu,HUANG Zhitao and ZHOU Yiyu.Blind Estimation of the Symbol Rate of a Long Code DSSS Signal[J].Journal of National University of Defense Technology,2007,29(6):44-48. |
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| Authors: | XU Haiyuan WANG Fenghu HUANG Zhitao and ZHOU Yiyu |
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| Institution: | College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | To investigate the blind estimation of the symbol rate of a long code direct sequence spread spectrum(DSSS) signal,an algorithm based on autocorrelation processing is proposed.First,the second order moment of the autocorrelation estimator is used to analyze the long code DSSS signal.Next,the estimator output is further processed to get rid of the peaks at multiples of the pseudo-noise(PN) sequence period.Finally,another autocorrelation estimator and the Fourier transform are used to extract the symbol rate.Theoretical analysis and simulation results show the efficiency of the proposed algorithm. |
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| Keywords: | parameter estimation second order moment of the autocorrelation estimator symbol rate long code direct sequence spread spectrum(DSSS) signal |
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