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An Optimized Successive Interference Cancellation for CI-Based Multiuser Detection Using VLSI Implementation Strategy

Geo.H.Provin, K.Sowmya

In this project, we proposed variable rate carrier interferometry multicarrier code division multiple access (CI/MC-CDMA) multiuser transceiver that achieves a data rate of minimum 1Gbps equivalent to the 4G standard of IEEE. Multiple Carrier -Code Division Multiple Access (MC-CDMA) is the combination of Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing (OFDM), therefore the advantages of both schemes can be achieved. In MC-CDMA scheme each data symbol is spreaded in frequency domain and transmitted on different subcarrier which eliminates frequency selective fading and show significant improvement in bit error rate performance. The proposed non-contiguous allocation improves the Performance of variable rate system over frequency selective Channel. In receiver side through iterative successive interference cancellation complexity is reduced considerably. The proposed successive interference cancellation strategies for a detector, is suitable for implementation in VLSI. Simulations are carried out for all the possible data rate schemes, results show that for the given users and BER of proposed algorithm comparatively gives far better results.