Multi-user transmitter preprocessing assisted uplink multi-cell multiple-input multiple-output system with base station cooperation over frequency-selective channels

  • Authors:

  • Prabagarane Nagaradjane;Prasaanth Muralidharan;Sabarish Karthik Vivek Sarathy;Yuvika Ashwina Rajan;Shriram Swaminathan

  • Affiliations:

  • Department of ECE, SSN Institutions, Chennai 603110, India;Qualcomm Inc., San Diego, CA 92121, United States;Department of ECE, Rutgers, State University of New Jersey, New Brunswick, NJ 08901, United States;Department of ECE, Georgia Institute of Technology, Atlanta, GA 30332, United States;Department of ECE, Georgia Institute of Technology, Atlanta, GA 30332, United States

  • Venue:
  • Computers and Electrical Engineering
  • Year:
  • 2013

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Abstract

The performance of cellular uplink multiple-input multiple-output systems, where co-channel interference (CCI) at the base stations (BSs) is a major performance impairment, is investigated in this correspondence principally from a multi-user transmitter preprocessing (MUTP) perspective over correlated frequency-selective channels. Transmitter preprocessing at the mobile station is formulated by singular value decomposition (SVD) of only the individual user's channel state information (CSI) while post-processing exploits all the users' CSI using BS cooperation. Our simulations show that this approach completely removes CCI and also outperforms classical zero-forcing multi-user detection, which has about the same detection complexity. Further, the results show that our system, coupled with the optimal 'water-filling' strategy for power allocation, results in higher capacity than the maximum signal-to-noise ratio strategy. Furthermore, SVD-based MUTP outperforms dirty paper coding and Tomlinson-Harashima precoding in terms of achievable symbol error rate.