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微波视距信道中的多径衰落是造成数字微波系统中断的主要原因。本文共分五个部分介绍。第一部分是引言。第二部分介绍信道传输中形成多径传播的物理原因、相应的典型数据和衰落概率分布。第三部分给出多径衰落的统计模型——多径模型和多项式模型。第四部分是判决系统中断的几种方法及系统中断率的计算法。第五部分陈述克服系统中断的措施,诸如分集、中频自适应均衡、基带时域均衡等。
Multipath fading in the line of sight of microwaves is the main cause of disruption of digital microwave systems. This article is divided into five parts. The first part is introduction. The second part introduces the physical reasons for multipath propagation in channel transmission, corresponding typical data and fading probability distribution. The third part gives the statistical models of multipath fading - multipath and polynomial models. The fourth part is to determine the system interrupt several methods and system interrupt rate calculation. The fifth part states the measures to overcome the system interruption, such as diversity, IF adaptive equalization, baseband time domain equalization and so on.