摘要
为抑制接收DS信号中的窄带干扰,研究了基于DFT只保留相位谱的DS信号接收方法,给出了该方法的一种迭代实现算法,有效降低了相位谱计算的运算量。讨论了该算法在DS系统抑制窄带干扰中的应用原理,分析了该算法在加性高斯白噪声信道中的性能损失,给出了一种计算性能损失的方法。对采用相位谱保留算法接收DS信号进行了数值仿真,给出了在窄带干扰和多址干扰情况下,该算法与常规DS信号接收方法的对比数值仿真结果。仿真结果表明:采用文中的算法处理后,可有效抑制窄带干扰,在多址干扰情况下,保留相位谱处理后没有引起明显的性能损失。
In order to mitigate narrow -band interference in DS system, a phase spectrum reservation processing is proposed in DS signal receiving and an iterative algorithm is employed in the method to reduce computational complexity. The suppressing narrow - band interference principle is discussed and the performance loss in AWGN channel is analvzed. A method of calculating the performance loss is presented. The numeric simulation results of receiving DS signal by phase reservation processing are presented for variety of interference conditions. These results demonstrate that the narrow band interference can be effectively suppressed and no obvious performance loss is caused after the phase spectrum reservation processing.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2009年第4期48-52,57,共6页
Journal of Air Force Engineering University(Natural Science Edition)
关键词
DS扩谱
窄带干扰抑制
相位谱
DFT
迭代算法
DS spread spectrum
narrow- band interference suppression
phase spectrum
DFT
iterative algorithm
