| Microwave technology has exited for over half of the century. It transmits the information by ground visual distance in microwave frequency band. It is a kind of wireless transmission technology. From the 1970s broadcast television bureau rent telecom microwave main line to transmit central broadcast television program, and many provinces have built their own broadcast television microwave nets. The early microwave transmission systems are all analogue. With the development and progress of the technology, the shortcomings of analogue microwave equipments'small transmission capacity have become more and more obvious. Today, broadcast television is becoming digital from producing to playing, and the digital program needs digital transmission means, so we must carry digitalization reform for analogue microwave equipments.By the early of 1980s and 1990s, satellite transmission and SDH synchronous transmission technology have been used widely in broadcast television program transmission, and the big capacity digital microwave transmission system of N*155Mb/s has appeared. Digital microwave has become one of the three big supports (microwave, fiber and satellite) of modern information transmission.In China, some provinces have carried digitalization reform for broadcast television microwave. Because of the provinces'differences in the location, population, economic state and transmission work, microwave digitalization reform's technology schemes are also different. At present, in the feasibility sdudy of broadcast television microwave's digitalization reform, the optimization of market demand and technology scheme feasibility sdudy has not been researched normatively. By putting theory into practice, this paper gives the optimization research for market demand and technology scheme of broadcast television microwave's digitalization reform, and some province's broadcast television microwave's digitalization reform can be referred and chosen. |
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