A simple joint beamforming and power control algorithm for multi-user MIMO wireless networks
- 12 April 2005
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 1 (10903038) , 247-251
- https://doi.org/10.1109/vetecf.2004.1399981
Abstract
We consider the joint optimization of transmitted power, receive and transmit beamforming vectors for multi-user MIMO wireless networks. Specifically, they are optimized such that the total transmit power is minimized while satisfying SINR requirements of all links. We first analytically show that maximum ratio transmission (MRT) beamforming is asymptotically optimal for the low SINR region and the corresponding optimal transmit power vector is element-wise minimal. We then propose a simple joint optimization algorithm tailored for cellular downlinks by exploiting network duality, which is applicable over a wide range of SINR. The proposed algorithm can be readily implemented in a distributed fashion since it requires only local adaptive beamforming at the receivers, a simple power control loop, and minimal feedback of the channel state information. Also, the algorithm achieves a performance close to that of centralized iterative optimization algorithms, and outperforms other decentralized approaches that have been previously proposed.Keywords
This publication has 15 references indexed in Scilit:
- On the Duality of Gaussian Multiple-Access and Broadcast ChannelsIEEE Transactions on Information Theory, 2004
- Sum capacity of the vector Gaussian broadcast channel and uplink–downlink dualityIEEE Transactions on Information Theory, 2003
- V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channelPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Layered space-time architecture for wireless communication in a fading environment when using multi-element antennasBell Labs Technical Journal, 2002
- Capacity of Multi‐antenna Gaussian ChannelsEuropean Transactions on Telecommunications, 1999
- Maximum ratio transmissionIEEE Transactions on Communications, 1999
- Joint optimal power control and beamforming in wireless networks using antenna arraysIEEE Transactions on Communications, 1998
- A framework for uplink power control in cellular radio systemsIEEE Journal on Selected Areas in Communications, 1995
- A simple distributed autonomous power control algorithm and its convergenceIEEE Transactions on Vehicular Technology, 1993
- Distributed cochannel interference control in cellular radio systemsIEEE Transactions on Vehicular Technology, 1992