短波电离层反射信道模型的建立与仿真

Modeling and simulation of short-wave ionospheric radio channel

工作在短波波段的电子战设备进行天波通信时 ,会受到电离层高度变化和多径传播的影响 ,使信号产生多普勒展宽和多径时延 ,表现为时间选择性衰落和频率选择性衰落 ,严重影响信号质量。本文介绍了短波电离层反射信道对信号的影响 ,推导出信道的理论模型 ,提出了实现方案 ,并利用systemview进行了信道仿真 ,结果表明 。

The random changing height of ionosphere and multipath propagation can cause signal Doppler broadening and multipath time delay of radio channel in high frequency band(3～30MHz), and result in time selective and frequency selective fades. A simply shortwave channel model of ionospheric reflection was presented in this paper. The simulation results by employing Systemview software show that the proposed model reflects basically the real properties of the shortwave channel.