Noise reduction using Haar wavelet and identification of nonlinear channel for QAM using neural network

Abstract

Recently, a considerable amount of attention is being given to the use of wavelets and neural network for modulation and equalization. The authors proposed a new scheme of equalization for constellation using discrete wavelet transform (DWT) and neural network. The DWT is used for noise reduction and the neural network is used to update the equalizer coefficients adaptively.