Downlink transmit beamforming is a promising technique to reduce interference, and power control is a technique to adjust transmission power to satisfy the link quality. Joint transmission power control and beamformin...Downlink transmit beamforming is a promising technique to reduce interference, and power control is a technique to adjust transmission power to satisfy the link quality. Joint transmission power control and beamforming are proposed to minimize total transmission power. The joint optimization problem is solved by receiver beamforming and power control in virtual uplink. SIR based power control is performed to adjust the power allocation, and transmit beamforming weight vectors are determined by Minimum Variance Distortionless Response (MVDR) criterion. The multipath combining weight vectors are determined by maximum ratio combining criterion. Simulation results show the joint optimization scheme decreases the transmission power, and system performance is enhanced.展开更多
基金This work is supported by Hi Tech Research and Development Program of China"863"(No.2004AA123180).
文摘Downlink transmit beamforming is a promising technique to reduce interference, and power control is a technique to adjust transmission power to satisfy the link quality. Joint transmission power control and beamforming are proposed to minimize total transmission power. The joint optimization problem is solved by receiver beamforming and power control in virtual uplink. SIR based power control is performed to adjust the power allocation, and transmit beamforming weight vectors are determined by Minimum Variance Distortionless Response (MVDR) criterion. The multipath combining weight vectors are determined by maximum ratio combining criterion. Simulation results show the joint optimization scheme decreases the transmission power, and system performance is enhanced.
