MIMO channel estimation: optimal training and tradeoffs between estimation techniques

Channel estimation in multiple-input multiple-output (MIMO) wireless communication systems plays a key role in the performance of space-time decoders that depends on the accuracy of the channel knowledge. In this paper, we study the performance of MIMO channel estimation using training sequences. The least squares (LS), minimum-mean-square error (MMSE), and a new scaled LS (SLS) approaches to the channel estimation are studied and the optimal choice of training signals is investigated for each of these techniques.

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

[2]  Seth D. Silverstein,et al.  Application of orthogonal codes to the calibration of active phased array antennas for communication satellites , 1997, IEEE Trans. Signal Process..

[3]  H. Luetkepohl.  The Handbook of Matrices , 1996 .

[4]  Thomas L. Marzetta,et al.  BLAST training : Estimating Channel Characteristics for High-Capacity Space-Time Wireless , 1999 .

[5]  Emre Telatar,et al.  Capacity of Multi-antenna Gaussian Channels , 1999, Eur. Trans. Telecommun..

[6]  Alex B. Gershman,et al.  Downlink Channel Estimation in Cellular Systems with Antenna Arrays at Base Stations Using Channel Probing with Feedback , 2004, EURASIP J. Adv. Signal Process..

[7]  C.C. Martin,et al.  Multiple-input multiple-output (MIMO) radio channel measurements , 2001, IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229).

[8]  Babak Hassibi,et al.  How much training is needed in multiple-antenna wireless links? , 2003, IEEE Trans. Inf. Theory.

[9]  Alex B. Gershman,et al.  Training-based MIMO channel estimation: a study of estimator tradeoffs and optimal training signals , 2006, IEEE Transactions on Signal Processing.

[10]  Ye Li.  Optimum training sequences for OFDM systems with multiple transmit antennas , 2000, Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137).

[11]  Georgios B. Giannakis,et al.  Optimal training for block transmissions over doubly selective wireless fading channels , 2003, IEEE Trans. Signal Process..

[12]  J. Cavers.  An analysis of pilot symbol assisted modulation for Rayleigh fading channels (mobile radio) , 1991 .

[13]  S. Kay.  Fundamentals of statistical signal processing: estimation theory , 1993 .