Abstract The key of developing high frequency wideband communication system is how to 　　

model the HF wideband channel. Some HF wideband models are discussed and compared in this paper, 　　

including Vogler model, parallel subband model, two improved Watterson models and Pseudo-　　

Deterministic model. As a deterministic model, Volger model basically describes the characteristics of HF 　　

wideband channel, but it also needs to be improved. The improvement of Vogler model is given in this 　　

paper.