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EURASIP Journal on Wireless Communications and Networking
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Energy-Efficient Channel Estimation in MIMO Systems

EURASIP Journal on Wireless Communications and Networking volume 2006, Article number: 027694 (2006) Cite this article

Abstract

The emergence of MIMO communications systems as practical high-data-rate wireless communications systems has created several technical challenges to be met. On the one hand, there is potential for enhancing system performance in terms of capacity and diversity. On the other hand, the presence of multiple transceivers at both ends has created additional cost in terms of hardware and energy consumption. For coherent detection as well as to do optimization such as water filling and beamforming, it is essential that the MIMO channel is known. However, due to the presence of multiple transceivers at both the transmitter and receiver, the channel estimation problem is more complicated and costly compared to a SISO system. Several solutions have been proposed to minimize the computational cost, and hence the energy spent in channel estimation of MIMO systems. We present a novel method of minimizing the overall energy consumption. Unlike existing methods, we consider the energy spent during the channel estimation phase which includes transmission of training symbols, storage of those symbols at the receiver, and also channel estimation at the receiver. We develop a model that is independent of the hardware or software used for channel estimation, and use a divide-and-conquer strategy to minimize the overall energy consumption.

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Authors and Affiliations

  1. Electrical and Computer Engineering Department, Drexel University, Philadelphia, PA, 19104, USA

    Sarod Yatawatta & Athina P Petropulu

  2. US Army RDECOM CERDEC STCD, Fort Monmouth, NJ, 07703, USA

    Charles J Graff

Authors
  1. Sarod Yatawatta
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  2. Athina P Petropulu
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  3. Charles J Graff
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Correspondence to Sarod Yatawatta.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yatawatta, S., Petropulu, A.P. & Graff, C.J. Energy-Efficient Channel Estimation in MIMO Systems. J Wireless Com Network 2006, 027694 (2006). https://doi.org/10.1155/WCN/2006/27694

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  • DOI: https://doi.org/10.1155/WCN/2006/27694

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