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Impact and Mitigation of Multiantenna Analog Front-End Mismatch in Transmit Maximum Ratio Combining

EURASIP Journal on Advances in Signal Processing volume 2006, Article number: 086931 (2006) Cite this article

Abstract

Transmit maximum ratio combining (MRC) allows to extend the range of wireless local area networks (WLANs) by exploiting spatial diversity and array gains. These gains, however, depend on the availability of the channel state information (CSI). In this perspective, an open-loop approach in time-division-duplex (TDD) systems relies on channel reciprocity between up- and downlink to acquire the CSI. Although the propagation channel can be assumed to be reciprocal, the radio-frequency (RF) transceivers may exhibit amplitude and phase mismatches between the up- and downlink. In this contribution, we present a statistical analysis to assess the impact of these mismatches on the performance of transmit-MRC. Furthermore, we propose a novel mixed-signal calibration scheme to mitigate these mismatches, which allows to reduce the implementation loss to as little as a few tenths of a dB. Finally, we also demonstrate the feasibility of the proposed calibration scheme in a real-time wireless MIMO-OFDM prototyping platform.

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Authors and Affiliations

  1. Interuniversity Microelectronics Center (IMEC), Wireless Research, Kapeldreef 75, Leuven, 3001, Belgium

    Jian Liu, Nadia Khaled, Frederik Petré & André Bourdoux

  2. Department ELEC-ETRO, Vrije Universiteit Brussel, Brussel, 1050, Belgium

    Jian Liu

  3. E.E. Department, KULeuven, ESAT/INSYS, Kapeldreef 75, Leuven, 3001, Belgium

    Nadia Khaled

  4. Department of ELEC, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussel, 1050, Belgium

    Alain Barel

Authors
  1. Jian Liu
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  2. Nadia Khaled
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  3. Frederik Petré
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  4. André Bourdoux
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  5. Alain Barel
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Correspondence to Jian Liu.

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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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Liu, J., Khaled, N., Petré, F. et al. Impact and Mitigation of Multiantenna Analog Front-End Mismatch in Transmit Maximum Ratio Combining. EURASIP J. Adv. Signal Process. 2006, 086931 (2006). https://doi.org/10.1155/ASP/2006/86931

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  • DOI: https://doi.org/10.1155/ASP/2006/86931

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