Hocine Merah, Mokhtaria Mesri*, Yacine Merrad and Larbi Talbi Pages 1 - 16 ( 16 )
Background & Objective: One of the disadvantages of Multi-carrier Code Division Multiple Access (MC-CDMA) system is the high value of Peak to Average Power Ratio (PAPR). This paper proposes an approach called Iterative Invertible Clipping Method (IICM) to address the PAPR for MC-CDMA signal based on wireless communication system characteristics. This is mainly concentrated in clipping function by use of a polynomial of degree three at the transmitter, and its inverse at the receiver to recover the original signal. A Fast Fourier Transform (FFT)-based frequency domain filter is employed to reduce the overall peak regrowth which is verified by measuring the Adjacent Channel Power Ratio (ACPR) after soft clipping and filtering. This technique is compared with the Ragusa method, which uses a polynomial of degree 5. The simulated results of the proposed method showed better performance in terms of PAPR reduction, Bit Error Rate (BER), and computational complexity using two iterations only. The Complementary Cumulative Complementary Density Function (CCDF) is served to measure and improve PAPR performance of the system. Conclusion: The channel coding process is applied to strengthen the obtained results in the Additive White Gaussian Noise (AWGN) channel and fading channel (Rayleigh). The High-Power Amplifier (HPA) is used for validation purposes.
AWGN, CCDF, FFT, HPA, IICM, Invertible Clipping, MC-CDMA, PAPR
Department of Electronics University of Laghouat, Department of Electronics University of Laghouat, Department of Electrical and Computer Engineering, International Islamic University , Department of Computer and Engineering, University of Québec, Outaouais