Cooperative beamforming for dual-hop amplify-and-forward multi-antenna relaying cellular networks

  • Authors:

  • Chengwen Xing;Shaodan Ma;Minghua Xia;Yik-Chung Wu

  • Affiliations:

  • School of Information and Electronics, Beijing Institute of Technology, Beijing, China;Department of Electrical and Computer Engineering, University of Macau, Macao;King Abdullah University of Science and Technology (KAUST), Saudi Arabia;Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong

  • Venue:
  • Signal Processing
  • Year:
  • 2012

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Abstract

In this paper, linear beamforming design for amplify-and-forward relaying cellular networks is considered, in which base station, relay station and mobile terminals are all equipped with multiple antennas. The design is based on minimum mean-square-error criterion, and both uplink and downlink scenarios are considered. It is found that the downlink and uplink beamforming design problems are in the same form, and iterative algorithms with the same structure can be used to solve the design problems. For the specific cases of fully loaded or overloaded uplink systems, a novel algorithm is derived and its relationships with several existing beamforming design algorithms for conventional MIMO or multiuser systems are revealed. Simulation results are presented to demonstrate the performance advantage of the proposed design algorithms.