窄带强干扰下直接扩谱序列信号的有限多循环检测器

DS signal detection by finite multi-cycle detector in intensive narrow-band interference

针对存在窄带强干扰情况下直接扩谱序列信号的检测,基于有限多循环频率特性提出一种有限多循环检测器,并就载频和码片时宽的误差对检测器的影响作了详细分析。通过仿真实验证明该检测器能对窄带强干扰中的直接扩谱序列信号进行有效检测,且其检测性能和稳健性要明显高于单循环检测器和辐射计。

Based on characteristics of several cyclic frequencies, a new type of finite multi-cycle detector is presented to detect DS signals in intensive narrow-band interference. The effect of parameter errors on detector is analyzed detailedly. Not only is this detector able to filter narrow-band interference efficiently from received signals, but also is it tolerant to error of carrier frequency or chip width. Simulations are carried out to evaluate performance of this new cyclic detector, which proves to outperform single-cycle detector and radiometer.1 引言 低截获概率通信系统常采用直接扩谱序列(DS)信号,在实际的信号检测系统中除受到噪声、宽带干扰影响外,还经常会出现一些窄带强干扰,这些窄带干扰用传统方法很难抑