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Recent advances in wireless communications have made use of MC-CDMA and OFDM techniques to allow for high data rate transmission. Rapid time variations of the wireless communication channel have an effect on the performance of multicarrier modulation. In this paper, the authors emphasis the Doppler spread and computes its effect on the Bit Error Rate (BER) for MultiCarrier Code Division Multiple Access (MC-CDMA) and orthogonal frequency division multiplexing (OFDM). Also, they evaluate the channel capacity to quantify the potential of MC-CDMA and OFDM. They evaluate the effect of Doppler spread with Doppler shift at various carrier frequencies. They also evaluate the capacity of LTI, OFDM, MC-CDMA and RAYLEIGH channels.
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