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一、前言随着我国国民经济的现代化发展,人们对距离在200～400公里、中间不设下话点、中等数据传输速率的超视距无线电路的需求日趋强烈。若采用卫星通信显然是不经济的;若采用中继通信又会带来扩大人员编制和难以管理等一系列问题,或者存在中继通信无法实现的情况。采用对流层窄带散射通信是实现上述条件下超视距数据传输的最佳选择。超短波对流层窄带散射通信与其他通信比较具有无可争议的优越性:投资最省,管理最方便,战争或者破坏性灾害后的存在能力最强。近十多年来,电子设备大量换用固态化、集成
I. Introduction With the modernization of our national economy, there is an increasing demand for over-the-horizon wireless circuits with medium data rates of 200 to 400 kilometers without any call center. If the use of satellite communications is clearly uneconomical; If the use of relay communications will bring a series of problems such as expanding staffing and difficult to manage, or the existence of relay communications can not be achieved. The use of tropospheric narrow-band scattering communication is the best choice to achieve over-the-horizon data transmission under the above conditions. Ultra-shortwave Tropospheric Narrowband Scattering Communications are incomparably superior to other communications in that they have the least investment, the most convenient management, and the strongest presence after war or disastrous disasters. Over the past decade, a large number of electronic equipment for solid-state, integrated