直扩通信中窄带干扰抑制的边带相关置换算法
doi: 10.3724/SP.J.1146.2006.00805
Narrow-band Interference Suppression in DSSS by Side Correlation Replacement Algorithm
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摘要: 论文提出了一种新的窄带干扰抑制算法，基于信号边带相关性的边带相关置换算法，通过计算接收信号频谱的边带相关函数确定载频和干扰中心频率，然后利用直扩信号频谱的对称性，用相对于窄带干扰的边带对称值代替干扰值达到消除干扰的目的。该算法对频谱具有对称性的调制方式都适用。计算机仿真结果表明边带相关置换算法的性能要优于变换域干扰置零的常规算法。Abstract: In direct sequence spread spectrum narrow-band interference suppression is one of the difficult tasks in signal processing. This paper proposes a new narrow-band interference suppression algorithm called side correlation replacement algorithm based on side band correlation of signal. The signal carrier and center frequency of narrow interference are fixed on by calculating the side correlation function. Then narrow-band interference is eliminated when it is replaced by side correlation value. This algorithm is good for all modulation whose spectrum is symmetry. Computer simulation results demonstrate that the algorithm is more effective than transform domain interference returns zero.
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