Signal Detection for EM-Based Iterative Receivers in MIMO-OFDM Mobile Communications

Kazushi MURAOKA; Kazuhiko FUKAWA; Hiroshi SUZUKI; Satoshi SUYAMA

doi:10.1587/transcom.E97.B.2480

Signal Detection for EM-Based Iterative Receivers in MIMO-OFDM Mobile Communications

Kazushi MURAOKA, Kazuhiko FUKAWA, Hiroshi SUZUKI, Satoshi SUYAMA

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Joint signal detection and channel estimation based on the expectation-maximization (EM) algorithm has been investigated for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) mobile communications over fast-fading channels. The previous work in [20] developed a channel estimation method suitable for the EM-based iterative receiver. However, it remained possible for unreliable received signals to be repetitively used during the iterative process. In order to improve the EM-based iterative receiver further, this paper proposes spatial removal from the perspective of a message-passing algorithm on factor graphs. The spatial removal performs the channel estimation of a targeted antenna by using detected signals that are obtained from the received signals of all antennas other than the targeted antenna. It can avoid the repetitive use of unreliable received signals for consecutive signal detection and channel estimation. Appropriate applications of the spatial removal are also discussed to exploit both the removal effect and the spatial diversity. Computer simulations under fast-fading conditions demonstrate that the appropriate applications of the spatial removal can improve the packet error rate (PER) of the EM-based receiver thanks to both the removal effect and the spatial diversity.

Publication: IEICE TRANSACTIONS on Communications Vol.E97-B No.11 pp.2480-2490

Publication Date: 2014/11/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E97.B.2480

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Kazushi MURAOKA
  Tokyo Institute of Technology
Kazuhiko FUKAWA
  Tokyo Institute of Technology
Hiroshi SUZUKI
  Tokyo Institute of Technology
Satoshi SUYAMA
  Tokyo Institute of Technology

Keyword

mobile communication, MIMO-OFDM, EM algorithm, factor graph, message passing, signal detection, channel estimation

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Kazushi MURAOKA, Kazuhiko FUKAWA, Hiroshi SUZUKI, Satoshi SUYAMA, "Signal Detection for EM-Based Iterative Receivers in MIMO-OFDM Mobile Communications" in IEICE TRANSACTIONS on Communications, vol. E97-B, no. 11, pp. 2480-2490, November 2014, doi: 10.1587/transcom.E97.B.2480.
Abstract: Joint signal detection and channel estimation based on the expectation-maximization (EM) algorithm has been investigated for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) mobile communications over fast-fading channels. The previous work in [20] developed a channel estimation method suitable for the EM-based iterative receiver. However, it remained possible for unreliable received signals to be repetitively used during the iterative process. In order to improve the EM-based iterative receiver further, this paper proposes spatial removal from the perspective of a message-passing algorithm on factor graphs. The spatial removal performs the channel estimation of a targeted antenna by using detected signals that are obtained from the received signals of all antennas other than the targeted antenna. It can avoid the repetitive use of unreliable received signals for consecutive signal detection and channel estimation. Appropriate applications of the spatial removal are also discussed to exploit both the removal effect and the spatial diversity. Computer simulations under fast-fading conditions demonstrate that the appropriate applications of the spatial removal can improve the packet error rate (PER) of the EM-based receiver thanks to both the removal effect and the spatial diversity.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.2480/_p

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@ARTICLE{e97-b_11_2480,
author={Kazushi MURAOKA, Kazuhiko FUKAWA, Hiroshi SUZUKI, Satoshi SUYAMA, },
journal={IEICE TRANSACTIONS on Communications},
title={Signal Detection for EM-Based Iterative Receivers in MIMO-OFDM Mobile Communications},
year={2014},
volume={E97-B},
number={11},
pages={2480-2490},
abstract={Joint signal detection and channel estimation based on the expectation-maximization (EM) algorithm has been investigated for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) mobile communications over fast-fading channels. The previous work in [20] developed a channel estimation method suitable for the EM-based iterative receiver. However, it remained possible for unreliable received signals to be repetitively used during the iterative process. In order to improve the EM-based iterative receiver further, this paper proposes spatial removal from the perspective of a message-passing algorithm on factor graphs. The spatial removal performs the channel estimation of a targeted antenna by using detected signals that are obtained from the received signals of all antennas other than the targeted antenna. It can avoid the repetitive use of unreliable received signals for consecutive signal detection and channel estimation. Appropriate applications of the spatial removal are also discussed to exploit both the removal effect and the spatial diversity. Computer simulations under fast-fading conditions demonstrate that the appropriate applications of the spatial removal can improve the packet error rate (PER) of the EM-based receiver thanks to both the removal effect and the spatial diversity.},
keywords={},
doi={10.1587/transcom.E97.B.2480},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - Signal Detection for EM-Based Iterative Receivers in MIMO-OFDM Mobile Communications
T2 - IEICE TRANSACTIONS on Communications
SP - 2480
EP - 2490
AU - Kazushi MURAOKA
AU - Kazuhiko FUKAWA
AU - Hiroshi SUZUKI
AU - Satoshi SUYAMA
PY - 2014
DO - 10.1587/transcom.E97.B.2480
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2014
AB - Joint signal detection and channel estimation based on the expectation-maximization (EM) algorithm has been investigated for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) mobile communications over fast-fading channels. The previous work in [20] developed a channel estimation method suitable for the EM-based iterative receiver. However, it remained possible for unreliable received signals to be repetitively used during the iterative process. In order to improve the EM-based iterative receiver further, this paper proposes spatial removal from the perspective of a message-passing algorithm on factor graphs. The spatial removal performs the channel estimation of a targeted antenna by using detected signals that are obtained from the received signals of all antennas other than the targeted antenna. It can avoid the repetitive use of unreliable received signals for consecutive signal detection and channel estimation. Appropriate applications of the spatial removal are also discussed to exploit both the removal effect and the spatial diversity. Computer simulations under fast-fading conditions demonstrate that the appropriate applications of the spatial removal can improve the packet error rate (PER) of the EM-based receiver thanks to both the removal effect and the spatial diversity.
ER -