Abstract: The multi-carrier code division multiple access (MCCDMA) combines the strong points of CDMA and orthogonal frequency division multiplexing (OFDM) which has the advantages of high frequency efficiency and excellent capacity to resist frequency selective fading. The MCCDMA has broader usage in cellular mobile, wireless LAN and Ultra Wide-Band (UWB) communications. And now, people have considered MCCDMA as the effective solution scheme in the 4G communication systems. The key technologies such as the resistance of high Peak to Average Power Ratio (PAPR), channel estimation and system synchronization are deeply researched in this paper. The transmitter model and the receiver modes were detailed. This article investigates the PAPR minimization. Based on the model of high power amplifier (HPA), the distortions caused by HPA nonlinearity and the impact of PAPR minimization on performance were analyzed.
Keywords: peak to average power ratio, OFDM, MCCDMA, distortion, clipping.