一种适用于卫星通信的自适应窄带干扰抑制方法

An Adaptive Narrowband Interference Suppression Method Suitable for Satellite Communication

针对卫星通信系统中的抗干扰问题,提出一种能够根据干扰变化自适应调整策略的干扰抑制方法。该方法通过子带分割、按功率排序、依次陷波等方式进行陷波,然后对比陷波前后信号信噪比的增益,从而确定信噪比增益最大时所对应的子带陷波个数,最终得到信噪比增益最高也即性能最优的陷波方式。该方法不需要预先进行干扰检测,也不需要寻找和设置门限阈值,就可以对多种类型干扰进行自适应陷波,从而达到有效抑制包含单音、窄带、梳状或部分频带等不同干扰的目的,能够显著改善链路的通信性能,提高通信系统的抗干扰能力。

Aiming at the problem of anti-interference in communication systems,an adaptive in-terference suppression method is proposed.Subband segmentation,power sorting,and sequential notch filtering are used to perform notch filtering.The gain of the signal-to-noise ratio of the sig-nal before and after the notch is compared to determine the number of subband notches corre-sponding to the maximum signal-to-noise ratio gain.Finally,the notch method with the highest signal-to-noise ratio gain and the best performance is obtained.Prior interference detection,searching and setting threshold values are not required.Multiple types of interference can be a-daptively notched.Different interferences are effectively suppressed including single tone,nar-rowband,comb or partial frequency bands.The communication performance of the link is signifi-cantly improved and the anti-interference ability of the communication system is enhanced.