基于传播算子的DS-SS信号扩频波形估计
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摘要
扩频信号波形估计的本质是信号子空间估计。针对直接序列扩频(Direct Sequence Spread Spectrum,DS-SS)信号的扩频波形估计问题,提出了一种基于传播算子的估计算法。针对现有算法估计信号子空间计算量较大的不足,所提算法利用传播算子估计信号子空间。理论分析了所提算法与现有算法的计算量和性能,并进行了仿真实验。仿真结果表明所提算法有效,且计算量远小于现有算法。
The estimation of spread spectrum signal waveform is essentially a problem of signal subspace estimation.In this paper,an estimation algorithm based on propagator method is proposed to solve the problem of direct sequence spread spectrum( DS-SS) signal spread spectrum waveform estimation. In view of the deficiency of the existing algorithm to estimate the signal subspace,the proposed algorithm uses the propagator method to estimate the signal subspace. The computational complexity and performance of the proposed algorithm and existing algorithm are theoretically analyzed,and simulation experiment on the algorithm is performed.The simulation results show that the algorithm is effective,and the amount of calculation is much less than that of the existing algorithm.
The estimation of spread spectrum signal waveform is essentially a problem of signal subspace estimation.In this paper,an estimation algorithm based on propagator method is proposed to solve the problem of direct sequence spread spectrum( DS-SS) signal spread spectrum waveform estimation. In view of the deficiency of the existing algorithm to estimate the signal subspace,the proposed algorithm uses the propagator method to estimate the signal subspace. The computational complexity and performance of the proposed algorithm and existing algorithm are theoretically analyzed,and simulation experiment on the algorithm is performed.The simulation results show that the algorithm is effective,and the amount of calculation is much less than that of the existing algorithm.
引文
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[11]解辉,韩壮志,丁爽.基于传播算子算法的扰码序列估计方法[J].系统工程与电子技术,2017,39(10):2327-2332.
[12]郭利凯,吴瑛,尹洁昕.改进传播算子的角度和多普勒频率联合估计算法[J].信号处理,2017,33(5):741-748.
[13] BOUDER C,AZOU S S,BUREL G.Performance analysis of a spreading sequence estimator for spread spectrum transmissions[J].Journal of Franklin Institute,2004,341(1):595-614.
[2]张花国,李鑫,张建华,等.基于半定松弛的长码DSSS信号扩频波形估计[J].电子学报,2016,44(2):334-339.
[3] HUANG X G,HUANG W,WANG C,et al.Blind reconnaissance of the pseudo-random sequence in DS/SS signal with negative SNR[J].Science in China(Series F:Information Sciences),2007(3):510-520.
[4] HILL P C J,RIDLEY M E.Blind estimation of direct-sequence spread spectrum-sequence chip codes[C]//Proceedings of 2000 IEEE 6th International Symposium on Spread-Spectrum Technique&Application. New Jersey:IEEE,2000:305-309.
[5]张天骐,杨强,宋玉龙,等.基于相似度的直扩信号盲解扩方法[J].系统工程与电子技术,2017,39(7):1451-1456.
[6]尹辉,赵知劲.利用Fast ICA和三阶相关函数的多天线辅助NPLC-DS-CDMA扩频码盲估计[J].信号处理,2018,34(3):289-295.
[7]朱照阳,高勇.短码、周期长码直扩信号伪码序列盲估计[J].电讯技术,2017,57(11):1313-1319.
[8]张天骐,杨凯,赵亮,等.多径衰落信道下MC-CDMA信号扩频序列周期盲估计[J].系统工程与电子技术,2017,39(12):2803-2809.
[9] REN Z Y,JIANG T,ZHONG Y,etc.Data-aided synchronization algorithm dispensing with searching procedures for UWB communications[J]. Science China(Information Sciences),2012,55(4):778-788.
[10] QIAO Y W,LT J,REN Z Y.Direct-sequence codes based blind synchronization algorithm for UWB systems[J].The Journal of China Universities of Posts and Telecommunications,2009,16(3):45-51.
[11]解辉,韩壮志,丁爽.基于传播算子算法的扰码序列估计方法[J].系统工程与电子技术,2017,39(10):2327-2332.
[12]郭利凯,吴瑛,尹洁昕.改进传播算子的角度和多普勒频率联合估计算法[J].信号处理,2017,33(5):741-748.
[13] BOUDER C,AZOU S S,BUREL G.Performance analysis of a spreading sequence estimator for spread spectrum transmissions[J].Journal of Franklin Institute,2004,341(1):595-614.