Transmitter Design for LMS-MIMO-MCCDMA Systems with Pilot Channel Estimates and Zero Forcing Equalizer

Authors: S.M. Bahri, F.T. Bendimerad

Abstract:

We propose a downlink multiple-input multipleoutput (MIMO) multi-carrier code division multiple access (MCCDMA) system with adaptive beamforming algorithm for smart antennas. The algorithm used in this paper is based on the Least Mean Square (LMS), with pilot channel estimation (PCE) and the zero forcing equalizer (ZFE) in the receiver, requiring reference signal and no knowledge channel. MC-CDMA is studied in a multiple antenna context in order to efficiently exploit robustness against multipath effects and multi-user flexibility of MC-CDMA and channel diversity offered by MIMO systems for radio mobile channels. Computer simulations, considering multi-path Rayleigh Fading Channel, interference inter symbol and interference are presented to verify the performance. Simulation results show that the scheme achieves good performance in a multi-user system.

Keywords: Adaptive Beamforming, LMS Algorithm, MCCDMA, MIMO System, Smart Antenna.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1071047

References:

[1] Y. Ogawa, M. Ohmiya, and K. Itoh, "An adaptive array system for highspeed mobile communications," IEEE Personal Commun, vol. E75B, May 1992, no. 5, pp. 413-421.
[2] Y. Ogawa, and T. Ohgane, "Adaptive antennas for future mobile radio," IEICE Trans. Fundamentals, vol. E79-A, No. 7, July 1996, pp. 961-967.
[3] E. Telatar, "Capacity of multi-antenna Gaussian channels," AT&T Bell Labs. Tech. Memo, vol. 10, No. 6, Oct. 1995, pp. 585-595.
[4] H. Sampath, P. Stoica, and A. Paulraj, "Generalized linear precoder and decoder design for MIMO channels using the weighted mmse criterion," IEEE Trans. on Commun, vol. 49, No. 12, Dec 2001, pp. 2198-2206.
[5] N. Yee, J-P. Linnartz, G. Fettweis, "Multicarrier CDMA in indoor wireless radio networks," IEEE PIMRC, Sept. 1993, pp. 109-113.
[6] K. Fazel, L. Papke, "On the performance of convolutionnally-coded CDMA/OFDM for mobile communication system," IEEE PIMRC, Sept 1993, pp. 468-472.
[7] R. Aifeng, Y. Qinye, "Blind Channel Estimation for Space-Time Block Coded MC-CDMA System," LNCS, Springer-Verlag Berlin Heidelberg, Vol. 4223, 2006, pp. 1092-1095.
[8] A. F. Naguib, "Adaptive antenna for CDMA W ireless Networks," Ph. D. thesis, 1996, Stanford Univ., Stanford, CA.
[9] K. K. Wong, R. D. Murch, and K. B. Letaief, "Optimizing time and space MlMO antenna system for frequency selective fading channels," IEEE Journal on Selected Areas in Communication, vol. 19, No. 7, July 2001, pp. 1395-1407.
[10] J. Park, L. M. Tuan, and C. Yoon, "A New Adaptive Beamforming Algorithm for MIMO Smart Antennas," IEEE Trans. on Comm, 2002, pp. 664-667.
[11] Y. Sun, and M. S. Yee, "MIMO Iterative Array Processing with LMMSE Turbo Equalization," IEEE Vehicular Technology Conference, Vol. 3, 2005, pp. 1585-1589.