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Watterson模型在众多短波电离层信道模型中应用较多的一种模型,从理论上分析了电离层信道Watterson模型的谱密度函数,论证了Watterson仿真模型能实现影响短波通信的电离层多径、多普勒频移和多普勒频扩三个因素;然后采用Matlab的OOP技术对其进行建模仿真,研究分析了Link11数据链中的π/4-DQPSK信号通过Watterson信道模型后的误码率。仿真结果表明,Watterson模型能很好地仿真短波电离层信道特性和应用在短波数字信号通信误码率的分析。
Watterson model applies many models to many shortwave ionospheric channel models, and theoretically analyzes the spectral density function of Watterson model of ionospheric channel. It is demonstrated that Watterson model can realize ionospheric multipath, multi Doppler frequency shift and Doppler frequency spread. Then, we use OOP technology of Matlab to simulate it, and analyze the bit error rate of π / 4-DQPSK signal in Link11 data chain after passing Watterson channel model . The simulation results show that the Watterson model can well simulate the short-wave ionospheric channel characteristics and its application in the short-wave digital signal communication bit error rate analysis.