MIMO EGT-MRC Scheme in Uplink Frequency Selective Channels with Mutual Coupling

  • Authors:
  • Wei Jiong Zhang;Qiang Guo;Xi Lang Zhou;Zhang Jun Guan

  • Affiliations:
  • Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, China 200240;Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, China 200240;Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, China 200240;Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, China 200240

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2011

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Abstract

Multiple-input multiple-output (MIMO) beamforming is a joint spatial diversity scheme applied in frequency selective channels to enhance system performance. In uplink transmission, the impact of correlation of path gains and mutual coupling at transmitters cannot be ignored because of the size constraint on mobile terminals. In this paper, an iterative MIMO beamforming algorithm with maximal ratio transmit-maximal ratio combining (MRT-MRC) strategy is presented to improve the output signal-to-noise and interference ratio in the presence of spatial correlation and mutual coupling between transmit elements. To reduce the complexity of systems, we also propose an equal gain transmit-maximal ratio combining (EGT-MRC) scheme. In contrast to MRT-MRC scheme, this algorithm can provide better system performance. The results of numerical simulations verify the advantages of this scheme.