Performance Evaluation of DWT based Multiple Input Multiple Output OFDM for Internet Telephony Applications

Digital communication plays a vital role in transmitting and receiving the information. With the advent of advancements in telecommunications, requirement of high data rate is in evident in Digital communication for the transmission of the signal. The information which has to be transmitted over a long distance needed to be error free while receiving in order to obtain the quality of the information. Emphasizing on the high data rate and also error free requirements, the role of Multiple Input Multiple Output and Wavelet as a combination makes progress towards high extent in achieving successful transmission. The proposed work emphasizes on the application of Discrete wavelet transform for filtering the Quadrature Amplitude modulated wave for the internet telephonic communication where the digital communication plays a major role. This proposed work purely concentrates on the digital communication part of the internet telephony communications. Stein’s Unbiased Risk Estimate is used to obtain the information samples with soft thresholding. The Bit to Error rate performance is measured for various modulation order and the simulated results are shown and also the values of the Bit to Error rate are tabulated.