Adaptive Co-Channel Interference Suppression Technique for Multi-User MIMO MC DS/CDMA Systems

Prabagarane Nagaradjane; Arvind Sai Sarathi Vasan; Lakshmi Krishnan; Anand Venkataswamy

doi:10.4236/ijcns.2009.29095

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International Journal of Communications,... > Vol.2 No.9, December 2009

Adaptive Co-Channel Interference Suppression Technique for Multi-User MIMO MC DS/CDMA Systems ()

Prabagarane Nagaradjane, Arvind Sai Sarathi Vasan, Lakshmi Krishnan, Anand Venkataswamy

DOI: 10.4236/ijcns.2009.29095 PDF HTML 5,406 Downloads 9,354 Views Citations

Abstract

In this paper, an adaptive co-channel interference suppression technique for multi-user MIMO MC DS/CDMA system is envisaged. MC DS/CDMA offers many advantages like flexibility, robustness, low PAPR and spectral efficiency. In spite of these advantages, performance of MC DS/CDMA system is greatly impaired by interference. Common interferences, which degrade the performance of the system, are MAI and CCI. Mitigating these interferences can directly increase the capacity of the system. In this work, an adaptive co-channel interference suppression technique based on single-stage and two-stage MMSE IC is considered for multi-user MIMO MC DS/CDMA system. Simulation results show that, at low SNR two-stage MMSE IC outperforms single-stage, while at high SNR, single-stage provides better BER performance. Based on this, a selection criterion has been propounded for improved system performance as a whole in interference limited environment. Also, adaptive selection criterion resulted in better error performance.

Keywords

CCI, MIMO, MC DS/CDMA, MMSE IC, ML Decoding

Share and Cite:

P. Nagaradjane, A. Sai Sarathi Vasan, L. Krishnan and A. Venkataswamy, "Adaptive Co-Channel Interference Suppression Technique for Multi-User MIMO MC DS/CDMA Systems," International Journal of Communications, Network and System Sciences, Vol. 2 No. 9, 2009, pp. 822-826. doi: 10.4236/ijcns.2009.29095.

Conflicts of Interest

The authors declare no conflicts of interest.

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