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我国微波通信目前是以4GHz600路和960路系统为主体的模似微波通信。4GHz频段对微波传播非常有利,雨、雪、雾等引起的传播衰耗均可忽略,站距可以长达50公里。如果把现有的4GHz模拟微波数字化,同样可以得到比较经济的数字微波电路。我国的主要微波干线电路大都在七十年代初建成,开通运行后都发现一些类似的普遍性问题。下面以P—S—H微波电路为例,从设计存在问题,实际传输质量以及质量指标要求等几个方面,讨论过渡的可能性。
China’s microwave communication is currently based on 4GHz600 Road and 960 Road system as the main analog microwave communication. 4GHz band microwave propagation is very favorable, rain, snow, fog and other transmission caused by the attenuation can be ignored, the station can be up to 50 km long. If the existing 4GHz analog microwave digital, the same can be more economical digital microwave circuit. Most of our country’s major microwave trunk circuits were built in the early 1970s and some similar general problems were found after they were put into operation. The following P-S-H microwave circuit, for example, from the design problems, the actual transmission quality and quality requirements, and other aspects of the criteria to discuss the possibility of transition.