Low complexity per-antenna rate and power control approach for closed-loop V-BLAST

Hairuo Zhuang, Lin Dai, Shidong Zhou, Yan Yao
2003 IEEE Transactions on Communications  
Previous studies have shown that per-antenna rate and power control can greatly increase the data throughput of vertical Bell Labs layered space-time (V-BLAST), while an extra transmit antenna selection can provide additional diversity advantage. In this letter, we combine the transmit antenna selection with power and rate control of each antenna. We derive a simple criterion for minimum bit-error rate (BER) or minimum total transmit power when the data throughput is constant over time.
more » ... cing and zero-forcing successive interference cancellation detections are considered. For practical implementation, we also present a fast algorithm that gives near-optimal performance with very low complexity. Simulation results show that the proposed closed-loop BLAST outperforms the open-loop V-BLAST significantly in terms of BER performance, especially when the antennas exhibit strong fading correlations. Index Terms-Multiple-input-multiple-output (MIMO), rate and power control, transmit antenna selection, vertical Bell Labs layered space-time (V-BLAST).
doi:10.1109/tcomm.2003.819227 fatcat:bkmjtcq4vjbplc4h7xfr2wuzci