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


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.

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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.


[1] L. Hanzo, L-L. Yang, E-L. Kuna, and K. Yen, “Single and multi-carrier DS-CDMA multi-user detection, space-time spreading, synchronization and standards,” IEEE Press, 2003.
[2] M. K. Simon and M. S. Alouini, “BER performance of multi-carrier DS-CDMA systems over generalized fading channels,” IEEE International Conference, 1999.
[3] E. Bigieri, R. Calderbank, A. Constantinides, A. Goldsmith, A. Paulraj, and H. Vincent Poor, “MIMO wireless communications,” Cambridge University Press, 2007.
[4] Anand. V, Arvind. S, and Lakshmi Krishnan, “Investigations on the performance of MIMO assisted Multi Carrier DS/CDMA system with multi-user detection for 4G mobile communications,” Dissertation, SSN Institutions, 2009.
[5] Prabagarane Nagaradjane, Arvind Sai Sarathi Vasan, and Lakshmi Krishnan, “A robust space time co-channel interference mitigation and detection technique for multi-user MIMO multi-carrier DS/ CDMA systems,” Proceedings of IEEE International Conference, Wireless Vitae, 2009.
[6] S. Kondo and L. B. Milstein, “Performance of multi-carrier DS CDMA systems”, IEEE Transactions on Communications, Vol. 44, No. 2, February 1996.

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