Coordinated beamforming with limited feedback in the MIMO broadcast channel

Chan Byoung Chae, David Mazzarese, Nihar Jindal, Robert W. Heath

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

In this paper, we propose a new joint optimization of linear transmit beamforming and receive combining vectors for the multiple-input multiple-output (MIMO) broadcast channel. We consider the transmission of a single information stream to two users with two or more receive antennas. Unlike past work in which iterative computation is required to design the beamformers, we derive specific formulations for the transmit beamformers for two active users via a power iteration and a generalized eigen analysis. To enable practical implementation, a new limited feedback algorithm is proposed that exploits the structure of the algorithm to avoid full channel quantization. The feedback overhead of the proposed algorithm is independent of the number of receive antennas. Monte Carlo simulations are used to evaluate the bit error rate and the sum rate performances of the proposed algorithm. Simulation results show that the proposed method performs close to the sum capacity of the MIMO broadcast channel even with limited feedback.

Original languageEnglish
Article number4641960
Pages (from-to)1505-1515
Number of pages11
JournalIEEE Journal on Selected Areas in Communications
Volume26
Issue number8
DOIs
Publication statusPublished - 2008 Oct

Bibliographical note

Funding Information:
Manuscript received November 1, 2007; revised April 15, 2008. This work was supported by Samsung Electronics. The material in this paper was presented in part at the IEEE Int. Symp. on Pers., Indoor and Mobile Radio (PIMRC), Greece, Sep., 2007 and the Conf. on Info. Scien. and Systems (CISS), Princeton, NJ, March, 2008.

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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