跳频通信系统的盲窄带干扰抑制算法

Research on Blind Narrowband Interference Suppression Algorithm Based on FHSS

针对强干扰下信号被淹没、很难检测到有用信息的问题,研究干扰检测和抑制技术,提高抗干扰能力。建立了受窄带干扰影响的跳频接收机模型,在接收信号为盲的情况下,分析了基于非抽取小波包变换的干扰检测和抑制算法。在非抽取小波包变换的干扰抑制基础上,提出了基于AR模型线性预测的窄带干扰抑制算法,并对接收信号进行盲解跳和解调。仿真验证了所提方法的有效性。

When signal is submerged in the strong interference,it is difficult to detect useful information. Thus the interference detection and interference suppression technologies are studied in order to improve anti-interference capability. This paper constructs the frequency-hopping receiver model affected by narrowband interference,and analyzes the interference detection and suppression algorithms based on un-decimated wavelet packet transform in case that the received signal is blind. Based on the interference suppression of un-decimated wavelet packet,this paper proposes an algorithm of narrowband interference suppression in view of AR linear prediction model,and implements blind de-hopping and blind demodulation. The simulation verifies the effectiveness of the proposed algorithm.