Performance Comparison between Mc-cdma and Ds-cdma Systems for Awgn and Rayleigh Fading Channel

The latest technology in cellular mobile communication systems has become more demanding for better quality of service. It requires broad bandwidth for huge data transfer. In this paper, we compare the performance of Direct Sequence Code Division Multiple Access (DS-CDMA) and MultiCarrier Code Division Multiple Access (MC-CDMA) which are the major contenders for the next generation wireless signaling techniques. Code Division Multiple Access (CDMA) is a multiple access technique in which several transmitters can send information simultaneously over a single communication channel. Walsh-Hadamard (W-H) Code is chosen for spreading, which reduces Multiple Access Interference (MAI) due to its orthogonal property. Minimum mean square equalization (MMSE) and Matched filter detection is assumed for both DS-CDMA and MC-CDMA. The comparative study of Bit Error Rate (BER) performance over different modulation techniques is done and their performances are compared for BER and Eb/N0.