自适应滤波技术在扩频通信系统抗窄带干扰中的应用

自适应滤波技术在扩频通信窄带干扰抑制的应用中,需要一种快速收敛的自适应算法以便能跟踪快速变化的干扰信号。文章提出将基于LSL自适应算法的格型滤波器应用于直接序列扩频通信系统中。仿真结果表明,LSL自适应算法在线性预测中具有快速收敛特性,并且在收敛过程中具有数值稳定性,从而显著改善了系统的抗窄带干扰能力。

Application of Adaptive Filtering Technique in Narrow-Band Interference Excision of Spread Spectrum Communication System

In the application of adaptive filtering technique in narrow band suppression in spread spectrum communications, it is necessary to have an adaptive algorithm with fast convergence rate in order to track the rapidly changed interference. In this paper, we propose using a lattice structure filter based on LSL adaptive algorithm directly in sequence spread spectrum （DSSS） communication system. The simulation results demonstrate that the least-square-lattice adaptive algorithm has rapid convergence characteristic in linear prediction and has numerical stability in convergence process, thus makes the system＇s performance of narrow-band interference excision significantly improved.