海上超短波超视距对流层散射信道模型研究

传统的海上超短波电台与岸上联络主要采用的是视距方式，其性能受到极大限制，具备超视距能力的超短波通信受到广泛关注. 文中对影响目前海上超视距通信的超短波信道展开研究，并针对对流层散射传输是海上超视距通信主要模式，以及散射通信引起的多径、多普勒和损耗问题，提出运用Clarke和Jakes两种不同的模型来模拟对流层散射信道，给出超视距散射通信信道特性，并仿真了QPSK调制方式在散射信道下的误码率，得出了与理论Rayleigh衰落信道相近的误码结论，其可为后续延展分析超短波超视距通信提供重要借鉴.

Study on tropospheric scattering channel model of ultra short wave over the horizon at sea

The traditional offshore ultrashort wave radio mainly uses the line-of-sight mode to communicate with the shore, and its performance is greatly limited. Therefore, the ultrashort wave communication with over line-of-sight capability will be a general trend. This paper mainly studies the ultrashort wave channel affecting the current offshore over the horizon communication. Firstly, through analysis, it is proposed that tropospheric scattering transmission is the main mode of offshore over the horizon communication. Then, according to the multipath, Doppler and loss problems caused by scattering communication, Clarke and Jakes are proposed to simulate the tropospheric scattering channel. Finally, the conclusion of the characteristics of over the horizon scattering communication channel is given, and the bit error rate of QPSK modulation in the scattering channel is simulated. The bit error conclusion similar to the theoretical Rayleigh fading channel is obtained, which can provide an important reference for the subsequent extended analysis of ultra short wave over the horizon communication.