A Power Control Method Based on Post-Detection SINR Balancing in Cellular V-BLAST Systems

Power control is an effective technique to restrain the co-channel interference (CCI) in a cellular system. In this paper, an optimal power control method based on post-detection SINR balancing in a cellular V-BLAST system is proposed and its simplified solution with reduced complexity is also provided. The proposed optimal method may balance the post-detection SINR of each substream at mobile stations (MS) by adjusting power levels of every transmit antenna at base stations (BS) in the system. Simulation results show that it outperforms the existed power control method which adjusts the total transmit power of each BS to balance the SINR of received signal before space-time processing. The simplified solution significantly reduces the computing complexity with slight performance degradation

[1]  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).

[2]  Mary Ann Ingram,et al.  Power-controlled capacity for interfering MIMO links , 2001, VTC Fall.

[3]  Jens Zander,et al.  Centralized power control in cellular radio systems , 1993 .

[4]  Lin Dai,et al.  Low complexity per-antenna rate and power control approach for closed-loop V-BLAST , 2003, IEEE Trans. Commun..

[5]  Kwang Bok Lee,et al.  Transmit power allocation for a modified V-BLAST system , 2004, IEEE Transactions on Communications.

[6]  Angel E. Lozano,et al.  Approaching eigenmode BLAST channel capacity using V-BLAST with rate and power feedback , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

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

[8]  Ling Qiu,et al.  Low complexity power control approach based on MMSE detection for V-BLAST , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.