  In this paper, the impact of Forward Error Correction (FEC) code namely
Trellis code with interleaver on the performance of wavelet based MC-CDMA
wireless communication system with the implementation of Alamouti antenna
diversity scheme has been investigated in terms of Bit Error Rate (BER) as a
function of Signal-to-Noise Ratio (SNR) per bit. Simulation of the system under
proposed study has been done in M-ary modulation schemes (MPSK, MQAM and DPSK)
over AWGN and Rayleigh fading channel incorporating Walsh Hadamard code as
orthogonal spreading code to discriminate the message signal for individual
user. It is observed via computer simulation that the performance of the
interleaved coded based proposed system outperforms than that of the uncoded
system in all modulation schemes over Rayleigh fading channel.
