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Design of Optimal Linear Precoder and Decoder for MIMO Channels with Per Antenna Power Constraint and Imperfect CSI

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Abstract

This paper addresses the problem of designing joint optimum precoder and decoder for multiple-input multiple-output communication system. Conventionally, most of the joint precoder and decoder designs are based on the sum power constraint (SPC) at the transmitter and perfect channel state information (CSI). However, in practice, per-antenna power constraint is more realistic as the power at each transmit antenna is limited individually by the linearity of the power amplifier. Further, the estimate of CSI cannot be obtained perfectly by any methods. Under imperfect CSI, the aim is to design jointly optimum precoder and decoder subject to a power constraint that jointly meets both per-antenna and SPCs. The objective function is formulated into an optimization problem that minimizes the mean square error in estimating the transmitted signal. The simulation results show that the proposed scheme has a near-optimum performance under practical constraints.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Sethu Institute of Technology, Kariapatti, Virudhunagar District, 626 115, India

    A. Merline

  2. TIFAC-CORE in Wireless Technologies, Department of Electronics and Communication Engineering, Thiagarajar College of Engineering, Madurai, 625 015, India

    S. J. Thiruvengadam

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  1. A. Merline
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  2. S. J. Thiruvengadam
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Correspondence to A. Merline.

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Merline, A., Thiruvengadam, S.J. Design of Optimal Linear Precoder and Decoder for MIMO Channels with Per Antenna Power Constraint and Imperfect CSI. Wireless Pers Commun 75, 1251–1263 (2014). https://doi.org/10.1007/s11277-013-1421-4

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  • DOI: https://doi.org/10.1007/s11277-013-1421-4

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