判决反馈均衡器结构及LMS算法研究

Research on the Structure of Decision-feedback Equalization and LMS Algorithm

数字通信系统中多径衰落的无线信道环境通常会使接收信号受到严重的码间干扰。自适应均衡可以校正信道产生的畸变。文中介绍了基于LMS算法的自适应均衡器的原理和结构,在给定的信道模型下利用MAT- LAB工具对其收敛速度和精度进行仿真,结果表明在无线通信中,判决反馈均衡器比线性均衡器有更好的效果。

The received signal is often corrupted badly by inter- symbol interference in the multipath fading wireless channel circumstance. The aberration can be emended by adaptive equalization technologies. This paper introduces the principle and structure of the automatic adaptive equalizer based on LMS. Under the present channel models, the convergence rate and precision of the equalizer are simulated with MATLAB. Resuits show that it is more effective than the linear adaptive equalizer in the wireless communications system.