Simulating research of multi-path channel fading and delay

When signal is rapidly transmitted in the multi-path fading channel,if the delay expanding of the channel is longer than the sign period of transmitted signal,the signal transmitting will lead to frequency selective fading and ISI(Intersymbol interference),but if the delay expanding of the channel is shorter than the sign period of transmitted signal,the signal transmitting will lead only to fading,not to ISI.By means of the stochastic character of the channel and through simulating the stationary stochastic process of the channel,we dive into discussing the fading character of the channel.This simulation forms a useful mathematic model and an effective platform for studying the coding techniques,modulation and the design of equalizer in the field of digital communication.Furthermore,the channel simulation can facilitate the findings of some new methods for digital communication.