分集合并及Rake接收抗多径衰落技术

摘要

The reasons that cause multipath fading are analyzed with the characters of wireless communica-tions.The diversity combining and Rake receiving technology anti-multipath fading are compared from the aspects of theory,implementation and efficiency.Based on the development of nowadays,the main directions of study generalized selecting combining and multidimensional combining are introduced.Some outlooks of anti-multipath fading are also given at last.%该文主要针对无线通信系统信号传播特点，首先分析了影响无线通信系统性能的多径衰落形成的原因，介绍了几种常见的抗多径衰落技术；接下来从技术原理、实现方式、应用效率等方面对分集合并与Rake接收技术在抗多径衰落效应上的表现进行分析比较；随后结合两种技术的发展现状，总结出多维分集与广义混合合并两个主要研究方向；最后对分集合并及Rake接收技术跟均衡与信道编码相结合的发展前景进行展望。