Abstract: Traditional HF channel model-Watterson Model could simulate channel variations during short terms. In order to simulate channel variations during various terms,a HF channel simulation algorithm based on SNR reproduction was presented according to the statistical characteristics of HF channel. With Walnut Street model as its foundation, observed data were analyzed and processed, the SNR variation models during intermediate and long terms were built, combined with traditional Watterson channel model, the specified HF channel was simulated through SNR prediction. Simulation results show that this algorithm could simulate SNR variations in real channcl,which provides good simulation of channel quality for HF network simulation.

Key words: HF,Network simulation,SNR,Walnut street,Watterson