Design and implementation of orthogonal based haar wavelet division multiplexing for 3GPP networks

A new modulation/multiplexing system using wavelet transform was proposed for (Third generation partnership project) 3GPP networks. This new modulation technique makes use of the existing standard (orthogonal frequency division multiplexing) OFDM system and replacing the Fourier transform blocks by wavelet transform blocks. There are wide varieties of wavelet transforms are available, out of which four were chosen. They are Haar, Daubechies 4, Biorthogonal and reverse Biorthogonal transforms. The performance of the wavelet based OFDM system using various modulations like BPSK, DPSK, QPSK, DQPSK, OQPSK and 16-QAM was assessed by various parameters such as bit error rate, eye diagram and constellation diagram. The haar wavelet along with BPSK modulation is concluded as the best one. The BER results of all transforms and its eyeheights for SNR of 18db are as shown. The proposed system is named as (orthogonal haar wavelet division multiplexing) OHWDM which can be implemented for 3GPP based future cellular networks.