Transform Methods for PAM Signals as Asymmetric Distribution and Performance Comparison of Bicepstrum Blind Equalizer using Asymmetric Distribution

PAM 신호의 비대칭 분포를 형성하기 위한 방법과 이를 이용한 3차 통계 자력 등화기의 성능 비교

We propose a 3rd order blind equalizer that incorporates a new transform method using either square root operation ($\sqrt{x]$) or reciprocal operation (1/x) in order to transform symmetric distribution of PAM signals at the transmitter, to asymmetric one. At the receiver, either the square operation or the reciprocal operation is needed to recover the asymmetrically transformed signals to the original ones after eualization. The reslts of the computer simulation, using the new method are better than the existing transform method using natural logarithm operation by the maximum of 8 dB in MSE. In addition, as the skewness of the asymmetrically transformed distribution has small values, the performances are improved.