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引言随着西北民航地空通信系统的飞速发展,目前兰州管制区域内地空通信主要通过甚高频通信来实现,并且分为4个扇区,每个扇区又有主频、备频、应急频率及相邻扇区频率。这就需要话音比选器,对管制中心收到的多个话音信号进行比选,并将信噪比最好的一路信号输出给主、备内话面板供管制员使用。比选器已成为地空通信系统的重要设备组成部分。
Introduction With the rapid development of civil aviation ground-air communications system in Northwest China, the current air and ground communications in Lanzhou-controlled areas are mainly realized through VHF communications and are divided into four sectors, each of which has its own primary frequency, standby frequency, emergency response Frequency and adjacent sector frequency. This requires a voice comparison device to compare multiple voice signals received by the control center and output the signal with the best signal-to-noise ratio to the master and backup voice-over panels for use by controllers. The comparator has become an important part of the air-ground communication system.