Imperfect channel state information in MIMO-transmission

A specially favorable MIMO-based concept for future mobile radio systems consists in the application of joint detection (JD) in the uplink and joint transmission (JT) in the downlink. By this, all the computationally complex signal processing is shifted to the base station (BS), resulting in low complexity mobile stations (MS). Both JD and JT require channel knowledge at the BS which, if time division duplexing is applied, can be obtained by training signal based channel estimation in the uplink. Unfortunately, channel estimates are never perfect, which leads to performance degradations if these channel estimates instead of perfect channel knowledge are used for JD or JT. A novel analytical analysis of these performance degradations is presented.

[1]  Aris L. Moustakas,et al.  Optimizing MIMO antenna systems with channel covariance feedback , 2003, IEEE J. Sel. Areas Commun..

[2]  Gerard J. Foschini,et al.  Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas , 1996, Bell Labs Technical Journal.

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

[4]  Milica Stojanovic,et al.  Performance of multiuser diversity reception in nonselective Rayleigh fading CDMA channels , 1994, 1994 IEEE GLOBECOM. Communications: Communications Theory Mini-Conference Record,.

[5]  Reinaldo A. Valenzuela,et al.  V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel , 1998, 1998 URSI International Symposium on Signals, Systems, and Electronics. Conference Proceedings (Cat. No.98EX167).

[6]  Upamanyu Madhow,et al.  Space-Time transmit precoding with imperfect feedback , 2001, IEEE Trans. Inf. Theory.

[7]  P. Maher,et al.  Handbook of Matrices , 1999, The Mathematical Gazette.

[8]  John G. Proakis,et al.  Digital Communications , 1983 .

[9]  Frank Kowalewski,et al.  Joint predistortion and transmit diversity , 2000, Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137).

[10]  Robert F. H. Fischer,et al.  Precoding and Signal Shaping for Digital Transmission , 2002 .

[11]  Tobias Weber,et al.  Joint transmission: advantageous downlink concept for CDMA mobile radio systems using time division duplexing , 2000 .

[12]  Wei Qiu,et al.  Transmit nonlinear zero forcing: energy efficient receiver oriented transmission in MIMO CDMA mobile radio downlinks , 2004, Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738).

[13]  Andrea J. Goldsmith,et al.  Channel capacity and beamforming for multiple transmit and receive antennas with covariance feedback , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).

[14]  Ramjee Prasad,et al.  OFDM for Wireless Multimedia Communications , 1999 .

[15]  Sergio Verdu,et al.  Multiuser Detection , 1998 .

[16]  Volker Jungnickel,et al.  On linear pre-processing in multi-antenna systems , 2002, Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE.

[17]  Ross D. Murch,et al.  New transmit schemes and simplified receivers for MIMO wireless communication systems , 2003, IEEE Trans. Wirel. Commun..

[18]  A. Paulraj,et al.  Adaptive transmitting antenna arrays with feedback , 1994, IEEE Signal Processing Letters.