Third-generation (3G) wireless systems are being driven by the desire to support innovative broadband multimedia services. Multicarrier Modulation Code Division Multiple Access (MCM-CDMA) or Orthogonal Frequency Division Multiplexing Code Division Multiple Access (OFDM-CDMA) schemes can meet such demand, so they are broadly considered as effective methods for future wireless multimedia communications. Since variant OFDM-CDMA schemes will coexist for a long time, reconfigurable multimode transceivers, which are compatible with diverse OFDM-CDMA schemes, are indispensable for base station and mobile station. In this paper, by exploiting the concept of Software-Defined Radio (SDR), an SDR-based baseband discrete model for variant OFDM-CDMA schemes is developed. Moreover, the corresponding matrix representation is addressed.
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