MC-CDMA PAPR Reduction using a Modified Exponential Companding Transform with Clipping
Multicarrier Code Division Multiple Access (MC-CDMA) system has the inherent problem of a high Peak to Average Power Ratio (PAPR), which results in nonlinear distortion at the High Power Amplifier (HPA) and consequently reduces power efficiency, performance degradation at the receiver. High PAPR causes lowers battery life, and requires HPAs. HPAs result in increased cost, reduced battery life, increased co-channel interference and Inter Symbol Interference (ISI). This paper analyzes a new idea that is combination of exponential companding transform and clipping concept to obtain a new Modified Exponential Companding with Clipping Transform(MECCT) technique for MC-CDMA PAPR reduction. This method evaluates performance analysis of MC-CDMA while considering linear companding and exponential companding (nonlinear) with the Additive White Gaussian Noise (AWGN) channel and is simulated using MATLAB. The simulation results show that the proposed algorithm reduces the PAPR by 2.0 dB, and are able to improve Bit Error Rate (BER), reduced Power Spectral density (PSD), and improvement in spectral bandwidth.
