A Novel Radon-Wavelet Based OFDM System Design and Performance Under Different Channel Conditions

Finite Radon Transform mapper has the ability to increase orthogonality of sub-carriers, it is non sensitive tochannel parameters variations, and has a small constellation energy compared with conventional Fast Fourier Transformbased orthogonal frequency division multiplexing. It is also able to work as a good interleaver which significantly reduces thebit error rate. Due to its good orthogonality, discrete wavelet transform is used for orthogonal frequency division multiplexingsystems which reduces inter symbol interference and inter carrier interference. This eliminates the need for cyclic prefix andincreases the spectral efficiency of the design. In this paper both Finite Radon Transform and Discrete Wavelet Transform areimplemented in a new design for orthogonal frequency division multiplexing. The new structure was tested and compared withconventional Fast Fourier Transform -based orthogonal frequency division multiplexing, Radon-based orthogonal frequencydivision multiplexing, and discrete wavelet transform -based orthogonal frequency division multiplexing for additive whiteGaussian noise channel, flat fading channel, and multi-path selective fading channel. Simulation tests were generated fordifferent channels parameters values. The obtained results showed that proposed system has increased spectral efficiency, reduced inter symbol interference and inter carrier interference, and improved bit error rate performance compared withother systems