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FPGA Based Realization of Multi- Carrier Direct Sequence CDMA for SDR Application

Neenu Joseph, Dr. P Nirmal Kumar

this paper presents the physical layer architecture of Software Defined Radio. Here Multi Carrier-Direct Sequence Code Division Multiple-Access (MC-DS-CDMA) system is used as the modulation technique to support multimedia services in mobile/wireless communication. This modulation technique is basically a combination of DS- CDMA and Orthogonal Frequency Division Multiplexing. This is combined with viterbi decoding algorithm has been reported. The challenging factors like peak power and Bit error rate of the transmitted signal is reduced with the proposed system. Two types of modulation are done. According to the Bit error rate we can change the modulation. FFT point is scalable in this Transceiver architecture. The speed of the transmission also increased,