Closed-loop modes for two high-rate linear space-time block codes

In this paper, we consider adaptive transmission for quasi-orthogonal space-time block codes employing 4 transmit antennas. Orthogonal space-time block codes provide full transmit diversity and are an efficient means to reduce the negative effect of fading channels on the wireless link performance. However, these codes cannot provide full symbol rate with more than two transmit antennas and orthogonality has thus to be sacrificed in order to achieve the high data-rates promised by MIMO systems. We propose a closed-loop mode for two quasi-orthogonal space-time block codes with symbol rate 2 that aims at reducing the performance degradation caused by the loss of orthogonality. The feedback scheme is based on partial channel state information available at the emitter. The performance of the adaptive modes with various detection techniques over a Rayleigh flat-fading channel is assessed by means of numerical simulations.

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

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

[3]  Stéphanie Rouquette-Léveil,et al.  Orthogonal full diversity space-time block coding based on transmit channel state information for 4 Tx antennas , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[4]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[5]  Hamid Jafarkhani.  A quasi-orthogonal space-time block code , 2001, IEEE Trans. Commun..

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

[7]  Olav Tirkkonen,et al.  Multi-Antenna Transceiver Techniques for 3G and Beyond: Hottinen/Multi-antenna , 2003 .

[8]  Ari Hottinen,et al.  Minimal non-orthogonality rate 1 space-time block code for 3+ Tx antennas , 2000, 2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536).

[9]  Erik G. Larsson,et al.  Space-time block coding for frequency-selective channels , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[10]  A. Robert Calderbank,et al.  Space-Time Codes for High Data Rate Wireless Communications : Performance criterion and Code Construction , 1998, IEEE Trans. Inf. Theory.

[11]  Babak Hassibi,et al.  High-rate codes that are linear in space and time , 2002, IEEE Trans. Inf. Theory.

[12]  Eko N. Onggosanusi,et al.  High rate space-time block coded scheme: performance and improvement in correlated fading channels , 2002, 2002 IEEE Wireless Communications and Networking Conference Record. WCNC 2002 (Cat. No.02TH8609).

[13]  Charles R. Johnson,et al.  Matrix analysis , 1985, Statistical Inference for Engineers and Data Scientists.

[14]  Cenk Toker,et al.  Space-time block coding for four transmit antennas with closed loop feedback over frequency selective fading channels , 2003, Proceedings 2003 IEEE Information Theory Workshop (Cat. No.03EX674).