The Research Of Adaptive Equalizer In Shot-Wave Communication

Shot-wave can be used in many fields of the communication. But the intersymbol interference(ISI) caused by multipath causes bit errors at the receiver. ISI has been recognized as the major obstacle to high speed data transmission over shotwave channels. Now Equalization is a very effective technique used to combat intersymbol interference. With the development of the communication, now the equalizer in the receiver is often the adaptive equalizer. In order to adapt to high speed data transportation, we often use the nonlinear adaptive equalizer. The faster the date respond changes the better character and convergence speed the equalizer should have.This paper analysis and discuss the structures and the algorithms of the equalizer. Compare the characteristics of the different equalizer. Hereproposes a new adaptive equalization algorithm----the combined RLSalgorithm. According to the mixed sliding exponential window recursive squares(SEWRLS) algorithm, proposes an adaptive decision equalizer (ADFE). And at last, simulate a new constant modulus blind equalization algorithm with adaptive adjusting the dispersion constant is proposed in this contribution.