Title: Utilization of the Fast Discrete Curvelet Transform in the OFDM System

Issue Number: Vol. 10, No. 2
Year of Publication: Jun - 2020
Page Numbers: 21-28
Authors: Mohamed H. M. Nerma
Journal Name: International Journal of Digital Information and Wireless Communications (IJDIWC)
- Hong Kong
DOI:  http://dx.doi.org/10.17781/P002656


With the high demand for high data rates, there is also a need to develop more efficient wireless communication systems so Orthogonal frequencydivision multiplexing (OFDM) was one of the options available to provide the required demand. The work done in this paper can be considered an effort in this direction. As it known, the inverse fast Fourier transform (IFFT) and the fast Fourier transform (FFT) are utilized in conventional OFDM systems for data modulation and demodulation respectively, but in this work a new OFDM system based on discrete fast curvelet conversion (FDCT) ) Has been proposed. As an alternative to FFT in the proposed model, the FDCT via Unequispaced fast Fourier transform (USFFT) has been used as well as the FDCT via Wrapping. In the 10 – tap Rayleigh channel, the results showed that the curvelet based OFDM system has higher spectral efficiency and low out – of – band (low – side loop) energy compared to the conventional OFDM system. With regard to spectral efficiency and power spectral density (PSD) the results showed that each of the FDCT conversions used in this work yields better results than conventional OFDM. On the other hand, and in the terms of the computational complexity, the given system gives more the computational complexity compared to conventional OFDM system. As a final point, and in the terms of the Bit Error Rate (BER) performance metric parameter using Binary Phase Shift Keying (BPSK), it can be deduced that the given system is outperformed the conventional OFDM and it performs almost same as the theoretical BER performance.