Interference MIMO relay channel: Joint power control and transceiver-relay beamforming

Muhammad R. A. Khandaker*, Yue Rong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


In this paper, we consider an interference multiple-input multiple-output (MIMO) relay system where multiple source nodes communicate with their desired destination nodes concurrently with the aid of distributed relay nodes all equipped with multiple antennas. We aim at minimizing the total source and relay transmit power such that a minimum signal-to-interference-plus-noise ratio (SINR) threshold is maintained at each receiver. An iterative joint power control and beamforming algorithm is developed to achieve this goal. The proposed algorithm exploits transmit-relay-receive beamforming technique to mitigate the interferences from the unintended sources in conjunction with transmit power control. In particular, we apply the semidefinite relaxation technique to transform the relay transmission power minimization problem into a semidefinite programming (SDP) problem which can be efficiently solved by interior point-based methods. Numerical simulations are performed to demonstrate the effectiveness of the proposed iterative algorithm.

Original languageEnglish
Pages (from-to)6509-6518
Number of pages10
JournalIEEE Transactions on Signal Processing
Issue number12
Publication statusPublished - Dec 2012


  • Beamforming
  • interference channel
  • MIMO relay
  • power control

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering


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