基于Simulink的短波电台的设计仿真

Design and Simulation of Shortwave Radio Based On Simulink

短波通信是远距离信息传输的重要手段,短波高速数据传输是数字通信领域的重要研究课题。本文主要从编码和调制方面入手,针对短波信道的一些问题,将Turbo码和正交频分复用技术应用于短波电台的设计中,同时,利用导频辅助的方法对信道进行估计,进行信道补偿,克服了短波信道的多径衰落和多普勒频移等因素的影响,有效地降低了系统的误码率,提高了整个系统的性能。最后在simulink中完成了系统模型的设计和仿真。

Shortwave communication has been one of the most important method of long distance communication. And the high speed data transmission by shortwave has also been a great topic for research in the field of Digital Communications. This paper focuses on some technical difficulties encountered in shortwave channel and tackles the task by applying Turbo code and OFDM （Orthogonal Frequency Division Multiplexing） techniques in the shortwave radio. At the same time, the pilot-assisted method has been used to estimate the channel and compensate the signal. This hence improves the overall system performance by overcoming the effects like mufti-path fading and Doppler spread and reduces the Bit Error Rate（BER） effectively. At last, the design of the system model and simulation are done based on simulink.