Optimal power control in MIMO systems with quantized feedback - [transactions papers]

We treat the problem of outage minimization via power control in MIMO systems with quantized feedback. We formulate the optimal quantized power control design for a general MIMO system and provide the numerical procedure for finding the optimal solution. Our results not only extend but also show the deficiency of the existing quantized power control schemes for MISO systems. We further propose a design based on the pre-evaluation of the packet error rate performance of practical MIMO systems employing short-length LDPC codes and QAM modulations and with possibly unreliable feedback links. It is demonstrated that with only a few bits of feedback, the resulting quantized power control strategy achieves considerable gain over a system without power control.

[1]  R. Heath,et al.  Limited feedback unitary precoding for spatial multiplexing systems , 2005, IEEE Transactions on Information Theory.

[2]  E. Biglieri,et al.  Limiting performance of block-fading channels with multiple antennas , 1999, Proceedings of the 1999 IEEE Information Theory and Communications Workshop (Cat. No. 99EX253).

[3]  E. Visotsky,et al.  Space-time precoding with imperfect feedback , 2000, 2000 IEEE International Symposium on Information Theory (Cat. No.00CH37060).

[4]  C. D. Gelatt,et al.  Optimization by Simulated Annealing , 1983, Science.

[5]  Robert W. Heath,et al.  Grassmannian beamforming for multiple-input multiple-output wireless systems , 2003, IEEE Trans. Inf. Theory.

[6]  Elza Erkip,et al.  On beamforming with finite rate feedback in multiple-antenna systems , 2003, IEEE Trans. Inf. Theory.

[7]  Ashutosh Sabharwal,et al.  Performance of quantized power control in multiple antenna systems , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[8]  Robert W. Heath,et al.  Limited feedback unitary precoding for orthogonal space-time block codes , 2005, IEEE Transactions on Signal Processing.

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

[10]  Evaggelos Geraniotis,et al.  Adaptive closed-loop power control with quantized feedback and loop filtering , 2002, IEEE Trans. Wirel. Commun..

[11]  Muriel Médard,et al.  The effect upon channel capacity in wireless communications of perfect and imperfect knowledge of the channel , 2000, IEEE Trans. Inf. Theory.

[12]  Gregory W. Wornell,et al.  Efficient use of side information in multiple-antenna data transmission over fading channels , 1998, IEEE J. Sel. Areas Commun..

[13]  Elza Erkip,et al.  On Channel State Information in Multiple Antenna Block Fading Channels , 2000 .

[14]  Srikrishna Bhashyam,et al.  Feedback gain in multiple antenna systems , 2002, IEEE Trans. Commun..

[15]  Giuseppe Caire,et al.  Optimum power control over fading channels , 1999, IEEE Trans. Inf. Theory.

[16]  Giuseppe Caire,et al.  Limiting performance of block-fading channels with multiple antennas , 2001, IEEE Trans. Inf. Theory.

[17]  Nariman Farvardin,et al.  Optimizing the transmit power for slow fading channels , 2000, IEEE Trans. Inf. Theory.