Adaptive antennas for MIMO OFDM-CDMA communication systems

In this paper, we propose symbol-based receivers for orthogonal frequency division multiplexing OFDM code-division multiple-access CDMA multiple-input-multiple-output MIMO communications in multipath fading channels. For multiuser and multipath fading environments, both intersymbol interference and multiple-access interference must be considered. We propose narrowband and wideband antennas and Wiener code filter for MIMO OFDM-CDMA systems. The proposed receivers are updated symbol-by-symbol to achieve low computational complexity. Simulation results show that the proposed Wiener code filter can improve the system performance for the proposed adaptive antennas. The wideband antenna can achieve better error-rate performance than that of the narrowband antenna when multipath effect exists. The convergence rate of the recursive least squares antennas is faster than that of the least mean square antennas. Copyright © 2013 John Wiley & Sons, Ltd.

[1]  Andreas Antoniou,et al.  Analysis of MMSE beamformer for DS-CDMA systems , 2001, 2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233).

[2]  Rodrigo C. de Lamare,et al.  Space-time adaptive reduced-rank processor for interference mitigation in DS-CDMA systems , 2008, IET Commun..

[3]  Emanuela Falletti,et al.  A novel blind adaptive space-time receiver for multi-code DS-CDMA , 2006, IEEE Transactions on Wireless Communications.

[4]  Thomas Kailath,et al.  ESPRIT-estimation of signal parameters via rotational invariance techniques , 1989, IEEE Trans. Acoust. Speech Signal Process..

[5]  Hideki Imai,et al.  Adaptive Array Antenna Based on Spatial Spectral Estimation Using Maximum Entropy Method (Special Issue on Adaptive Signal Processing in Mobile Radio Communications) , 1994 .

[6]  Theodore S. Rappaport,et al.  Smart Antennas for Wireless Communications: Is-95 and Third Generation Cdma Applications , 1999 .

[7]  R. O. Schmidt,et al.  Multiple emitter location and signal Parameter estimation , 1986 .

[8]  Hsueh-Jyh Li,et al.  A novel hybrid of adaptive array and equalizer for mobile communications , 2000, IEEE Trans. Veh. Technol..

[9]  B. Widrow,et al.  Stationary and nonstationary learning characteristics of the LMS adaptive filter , 1976, Proceedings of the IEEE.

[10]  Yunlong Cai,et al.  Space-Time Adaptive MMSE Multiuser Decision Feedback Detectors With Multiple-Feedback Interference Cancellation for CDMA Systems , 2009, IEEE Transactions on Vehicular Technology.

[11]  Shankar Prakriya,et al.  Semi-blind space-time receiver for multiuser detection of DS/CDMA signals in multipath channels , 2006 .

[12]  Khaled Ben Letaief,et al.  Adaptive MMSE receiver with beamforming for DS/CDMA systems , 2003, IEEE Trans. Wirel. Commun..

[13]  T. B. Vu,et al.  Adaptive space-time reduced-length MMSE receiver for interference suppression in DS/CDMA , 1998 .

[14]  Raviraj S. Adve,et al.  Reduced-Rank Adaptive Filtering Using Localized Processing for CDMA Systems , 2007, IEEE Transactions on Vehicular Technology.

[15]  Shigeki Obote,et al.  A Computation Reduced MMSE Adaptive Array Antenna Using Space-Temporal Simultaneous Processing Equalizer(Special Issue on Software Defined Radio Technology and Its Applications) , 2002 .

[16]  R. T. Compton.  Adaptive Antennas: Concepts and Performance , 1988 .

[17]  Rodrigo C. de Lamare,et al.  Reduced-Rank Space-Time Adaptive Interference Suppression With Joint Iterative Least Squares Algorithms for Spread-Spectrum Systems , 2010, IEEE Trans. Veh. Technol..

[18]  Chan Kyu Kim,et al.  An adaptive beamforming algorithm for MC-CDMA systems with antenna array , 2000, 2000 IEEE International Conference on Communications. ICC 2000. Global Convergence Through Communications. Conference Record.

[19]  V. D. Pharm,et al.  Adaptive space-time full- and reduced-length MMSE receivers in asynchronous DS/CDMA , 1998, IEEE GLOBECOM 1998 (Cat. NO. 98CH36250).

[20]  Benjamin Friedlander.  A subspace method for space time adaptive processing , 2005, IEEE Transactions on Signal Processing.

[21]  Khaled Ben Letaief,et al.  MIMO CDMA antenna system for SINR enhancement , 2003, IEEE Trans. Wirel. Commun..