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| 直接序列扩频信号的信噪比估计 | |
| 引用本文： | 胡建强,赵杭生. 直接序列扩频信号的信噪比估计[J]. 解放军理工大学学报(自然科学版), 2007, 8(1): 20-22 |
| 作者姓名： | 胡建强 赵杭生 |
| 作者单位： | 总参谋部第63研究所,江苏,南京,210007;总参谋部第63研究所,江苏,南京,210007 |
| 摘 要： | 准确可靠地估计直接序列扩频信号的信噪比,对于辅助完成通信过程中扩频信号的同步捕获及在电子对抗中都具有很重要的意义.针对直接序列扩频信号工作中信噪比较低的特点,提出了一种通过求解接收信号相关矩阵的特征值来估计信号信噪比的方法.分析了在相同数据和随机数据扩频调制条件下接收信号信噪比估计的计算方法,并对于有频差情况下的计算方法进行了说明.计算机仿真结果表明,该方法在低信噪比的条件下具有较强的可靠性. |
| 关 键 词： | 直接序列扩频 信噪比估计 相关矩阵 特征值 |
| 文章编号： | 1009-3443（2007）01-0020-03 |
| 收稿时间： | 2006-03-30 |
| 修稿时间： | 2006-03-30 |
Signal-noise-ratio estimation for direct sequence spread spectrum signals |
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| HU Jian-qiang and ZHAO Hang-sheng. Signal-noise-ratio estimation for direct sequence spread spectrum signals[J]. Journal of PLA University of Science and Technology(Natural Science Edition), 2007, 8(1): 20-22 | |
| Authors: | HU Jian-qiang and ZHAO Hang-sheng |
| Affiliation: | The 63rd Research Institute of PLA General Staff Headquarters,Nanjing 210007, China;The 63rd Research Institute of PLA General Staff Headquarters,Nanjing 210007, China |
| Abstract: | It is significant to accurately and reliably estimate the SNR of the DSSS signal for synchronization capturing as well as in electronic counter measures(ECM).In consideration of the low signal-noise-ratio(SNR) of DSSS signals,a method of estimating the SNR was given by resolving the eigenvalue of the received signal correlation matrix.The two cases of pilot modulated data and random modulated data were theoretically analyzed,and the calculating method was also presented when the frequency offset existed.The computer simulation results show the reliability and robustness of this algorithm in the estimation of the low SNR DSSS signals. |
| Keywords: | DSSS(direct sequence spread spectrum) signal-noise-ratio estimating correlation matrix eigenvalue |
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