Abstract:
In order to describe the wireless channel propagation characteristics in complicated radio environment, this paper proposes a novel channel model with restricted Doppler power spectrum. The principles and implementation methods of three modeling methods are discussed in details, including single-path filtering method, dual-path filtering method, and improved splicing method.The comparison analysis of autocorrelation function, Doppler spectrum,algorithm complexity and memory occupation of of the three typical models that generate the channel stochastic process are also presented.The results show that the root mean square error of the autocorrelation function of the improved splicing method is significantly lower than the other two methods when considering a restricted Doppler power spectrum. Meanwhile,the digital filters and Hilbert converters can be left out.The single-path filtering method leads to the lowest complexity cost. The contributions in the paper can help to select the constrained Doppler spectrum model and provide a reference for more complicated Doppler power spectrum modeling.