短波宽带信道动态软件仿真

Dynamic simulation for wideband high frequency channel

针对高频无线信道多径、衰落、多普勒频移和频扩的特点,设计了基于Watterson模型的短波信道软件仿真算法,将多径时延和多普勒频移建模为满足高斯分布的随机变量,扩展了Watterson模型的适用条件与有效带宽。并结合短波信道模型,提出了一种新的短波宽带信道软件动态仿真模拟方法。应用Matlab实现了短波宽带信道的仿真,结果证明了算法的有效性。此算法可以方便地应用到短波信道半实物模拟器中,具有较好的理论与实际应用价值。

High Frequency(HF) channel is time-varying multi-path fading channels involving multi-path fading,Doppler frequency shift and spectrum spread.Based on the usually used Watterson model,an improved software channel simulation is proposed.The time delay and frequency shift of each propagation path are both modeled as Gaussian random variables,making the improved Watterson model applicable to more HF propagation channels with larger bandwidth.Then the delay power profile of wideband HF model is sampled and adde...