Adaptive semi-blind channel estimation for ST-BC MIMO-CDMA systems with hybrid user signature

We extend our previous work to present a new semi-blind transceiver for the direct-sequence code division multiple access (DS-CDMA) system that uses multiple transmit and receive antennas (MIMO) system, equipped with space-time block code (ST-BC). In the transmitter we design a new hybrid augmented user signature (AUS) that composes of the desired user signatures and the prefix/postfix zero-padding sequences with respect to individual transmit-antennas. The hybrid AUS is devised to resolve the phase ambiguity problem which occurs in all blind receivers. At the receiver we propose a Capon-like semi-blind two-branch filter bank receiver, based on the linearly constrained constant modulus (LCCM) criterion, followed by the AUS-assisted semi-blind channel estimation and power method for block symbol recovery. This enables us to partially alleviate the effects of inter-block interference (IBI) and the multiple access interference (MAI). In the ST-BC MIMO-CDMA receiver with two-branch filterbank, we build on the generalized sidelobe canceller (GSC) structure with the RLS for implementing the adaptive semi-blind LCCM receiver. Via intense simulations it reveals that our proposed new transceiver has robust performance against the user's acquisition inaccuracies comparing with current available algorithms and to resolve the phase ambiguity problem.

[1]  K. Kwak,et al.  A modified constrained constant modulus approach to blind adaptive multiuser detection , 2001, IEEE Trans. Commun..

[2]  Urbashi Mitra,et al.  Semiblind channel estimation for CDMA systems with parallel data and pilot signals , 2004, IEEE Transactions on Communications.

[3]  André Bourdoux,et al.  Single-Carrier FDMA or Cyclic-Prefix CDMA With Optimized Spreading Sequences? , 2008, IEEE Transactions on Vehicular Technology.

[4]  L. P. Linde,et al.  On the convexity of the LCCM cost function for DS-CDMA blind multiuser detection , 2004, IEEE Communications Letters.

[5]  Sumit Roy,et al.  A subspace blind channel estimation method for OFDM systems without cyclic prefix , 2002, IEEE Trans. Wirel. Commun..

[6]  Dimitris A. Pados,et al.  Supervised Phase Correction of Blind Space–Time DS-CDMA Channel Estimates , 2007, IEEE Transactions on Communications.

[7]  Simon Haykin,et al.  Adaptive Filter Theory 4th Edition , 2002 .

[8]  Paul Mermelstein,et al.  Effects of diversity power control, and bandwidth an the capacity of microcellular CDMA systems , 1994, IEEE J. Sel. Areas Commun..

[9]  George V. Moustakides,et al.  Adaptive power techniques for blind channel estimation in CDMA systems , 2005, IEEE Transactions on Signal Processing.

[10]  Guangzeng Feng,et al.  Comments on "A linearly constrained constant modulus approach to blind adaptive multiuser interference suppression" , 2000, IEEE Commun. Lett..

[11]  Sumit Roy,et al.  A subspace blind channel estimation method for OFDM systems without cyclic prefix , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

[12]  Georgios B. Giannakis,et al.  Capon multiuser receiver for CDMA systems with space-time coding , 2002, IEEE Trans. Signal Process..

[14]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[15]  Yi-Sheng Chen,et al.  Blind-Channel Identification for MIMO Single-Carrier Zero-Padding Block-Transmission Systems , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[16]  Shiunn-Jang Chern,et al.  Constrained Adaptive Constant Modulus RLS Algorithm for Blind DS-CDMA Multiuser Receiver under Time-Varying Channels , 2007, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

[17]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[18]  Georgios B. Giannakis,et al.  Space-time coding for broadband wireless communications , 2003, Wirel. Commun. Mob. Comput..

[19]  Philip Schniter,et al.  Blind equalization using the constant modulus criterion: a review , 1998, Proc. IEEE.

[20]  Steve McLaughlin,et al.  Channel estimation and interference cancellation in CP-CDMA systems , 2007, IET Commun..

[22]  M. J. Gans,et al.  On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas , 1998, Wirel. Pers. Commun..

[23]  Joaquín Míguez,et al.  A linearly constrained constant modulus approach to blind adaptive multiuser interference suppression , 1998, IEEE Communications Letters.

[24]  N. Seshadri,et al.  Increasing data rate over wireless channels , 2000, IEEE Signal Process. Mag..

[25]  Brian L. Hughes,et al.  Differential space-time modulation , 1999, WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466).

[26]  Shiunn-Jang Chern,et al.  New ST-BC MIMO-CDMA transceiver with augmented user signatures , 2010, 2010 International Symposium on Intelligent Signal Processing and Communication Systems.