SIMO MC-CDMA multiuser detectors: A DSP implementation approach

This work presents a comparative framework for different multiuser detectors (MUD) applied to single input multiple output (SIMO) multicarrier-code division multiple access (MC-CDMA) system. The Optimum MUD (OMUD), Parallel Interference Cancelling (PIC), Linear MUDs and the 1-optimum Local Search (1-LS) algorithms are analyzed and compared as performance against complexity trade-off. Performance evaluation is carried out in terms of symbol error rate (SER), and further, the implementations aspects are fully exhibited through a number of operation complexity analysis. Simulation results indicate clearly the advantage of sub-optimum 1-LS detector approach in terms of performance-complexity trade-off.