Blind Equalization In Underwater Acoustic Channel High-speed Data Transmission Applications

In the field of underwater acoustic communications, the intersymbol interference caused by multipath effects will make the reliability and the rate of the propagation of underwater acoustic signals. To settle this problem, an effective way is adopting an equalizer at the receiver. But the traditional adaptive equalizers need periodically retrained, because the underwater acoustic channel is a stochastic time-varying channel. Although the traditional adaptive equalizer increase the reliability of the propagation, the rate of it is decreased. So they are not very applicable in the field of the propagation of high rate signals through an underwater acoustic channel. To overcome the defect of the adaptive equalizers, this thesis deal with the technique of the blind equalization that need not the training period.This thesis investigates a few of blind equalization algorithms that are broadly used. These equalizers' structures and principles are introduced in detail. The convergence properties of these equalizers applying in certain underwater acoustic channels are analyzed mathematically by computer simulations. The computer simulations provide satisfactional results.