【摘要】 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。更多还原

【Abstract】 Aiming at the problem of anti-interference in communication systems,an adaptive interference 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 signal before and after the notch is compared to determine the number of subband notches corresponding 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 adaptively notched. Different interferences are effectively suppressed including single tone,narrowband,comb or partial frequency bands. The communication performance of the link is significantly improved and the anti-interference ability of the communication system is enhanced.更多还原