空间分集选频调制解调器的设计与实现

摘要

For the application of the adaptive frequency selection on space diversity in dual-space troposcatter system,a new trop-oscatter modem is designed.The components and operation principle are introduced.Additionally,the design and implementation of real time channel estimating,link feedback control and outburst troposcatter demodulation techniques are analyzed.The test system is estab-lished by using the channel simulator and RF transceiver for indoor simulation test,and the test results show that the proposed modem is 4dB better than traditional modem,and prove the superiority of this modem.%针对空间分集选频技术体制在两重空间分集站型下的应用，设计并实现了新型散射调制解调器。介绍了两重空间分集选频调制解调器的组成，描述了基本工作原理，进而阐述了实时信道认知技术、链路反馈控制技术和突发散射解调技术的设计思路和实现方案。采用无线信道模拟器及微波收发信机搭建测试系统并进行室内模拟测试，测试结果表明，空间分集选频调制解调器的性能优于传统调制解调器4 dB，证实了新型调制解调器的优越性。