宽带跳频通信系统频域均衡算法

摘要

针对差分跳频通信系统跳频带宽宽、瞬时带宽窄的信号特点，提出了一种差分跳频均衡算法———基于最小均方算法的多跳联合频域均衡算法。分析了最小均方误差准则频域均衡与单符号最小均方频域均衡对宽带差分跳频通信系统的不适用性，从而提出适用于差分跳频通信系统的多跳联合最小均方频域均衡算法，给出了算法详细的设计过程和结构。对算法性能在频率选择性衰落信道条件下进行仿真评估，结果表明本算法对差分跳频通信系统的信道均衡性能具有显著的作用，能提高差分跳频系统的解调误码性能。%The signal of the differential frequency hopping system has a broadband when it hops,and has a narrowband in each hop.This paper proposes a frequency domain equalization algorithm for the differential fre-quency hopping system,i.e.,the multi-hopping frequency domain equalization algorithm based on the least-mean-square.The shortages of the frequency domain equalization algorithm based on minimum mean square er-ror criteria and the least-mean-square frequency domain equalization algorithm are analyzed,and then the multi-hopping frequency domain equalization algorithm is proposed based on the least-mean-square for the differential frequency hopping system.The algorithm design and its structure are given in detail.The simulation result shows that the proposed algorithm is very efficient to equalize the channel for the differential frequency hopping system over a frequency-selective fading channel,and can improve the BER performance of the frequency hopping system.