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IJSTR >> Volume 9 - Issue 3, March 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

A Novel Approach For Ofdm Model Design Using Wavelet Packet Transform

[Full Text]



Laxmi Prasad Mishra, Mihir Narayan Mohanty



Orthogonal Frequency Division Multiplexing (OFDM), Rayleigh fading channel, Discrete Wavelet Packet Transform (DPWT), Quadrature Amplitude Modulation (QAM).



In this growing age, wireless communication demands higher data types transmission with less error or no error. This tends for multipath propagation of radio signals. As a result, the constructive signals, destructive interference as well as phase shifting can be handled smoothly. OFDM technique is one of the solutions for such purpose. The model of OFDM system needs to be improved for better communication. In this paper, authors try to develop a model based on wavelet packet transform (WPT) that releases contamination of the channels. Simultaneously the use of WPT model, there will be no used of cyclic prefix (CP). Further the models is verified for different channels like AWGN, Rayleigh and Rician fading channels for different techniques. It is found that the Raleigh’s channel is better than other two channels and considered for QAM transmission that satisfies multi carrier modulation. BER is measured and exhibited in the result section as the proof of the proposed model.



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