Design and Simulation of Discrete Wavelet Transform for OFDM Wireless Communication Channel

To increase data rate of wireless medium with high performance, orthogonal frequency division multiplexing (OFDM) is used. Recently wavelet transform is a possible transform to generate the sub channels in a multicarrier system. Discrete wavelet transform (DWT) is faster than fast Fourier transform of OFDM hence it’s replaced by transform technique for OFDM so it is called as orthogonal wavelet division multiplexing (OWDM). For both designing wavelets and measure a performance in terms of BER and SNR using AWGN channel, we proposed a fast lifting discrete wavelet transform (LDWT) technique. Performance of BER is evaluated and the design of LDWT based OWDM is synthesized through computer simulations using MATLAB. The Lifting Scheme architecture is implemented on FPGA optimizing hardware, speed & cost. The RTL code is written in Verilog-HDL and simulated in Modelsim.