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一、前言在对流层散射通信中,信号电平呈现剧烈的衰落变化,其主中放需加自动增益控制。但是自动增益控制能起到什么作用?对其应作什么要求?自动增益控制如何适应散射信道的特点?技术上如何实现以及这种控制方式实现以后其控制效果如何?本文将逐一给以阐述。
I. INTRODUCTION In the tropospheric scatter communications, the signal level shows dramatic fading changes. The main radio station needs to add automatic gain control. However, what is the function of automatic gain control? What should be done to it? How can the automatic gain control adapt to the characteristics of the scattered channel? How to realize the control method after the realization of this control method? This article will elaborate on a case by case basis.