Low-Complexity Iterative Receiver for Coded MIMO-OFDM Systems Based on PIC-MRC

Wenfeng LIN; Chen HE

doi:10.1093/ietcom/e90-b.11.3274

Low-Complexity Iterative Receiver for Coded MIMO-OFDM Systems Based on PIC-MRC

Wenfeng LIN, Chen HE

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A novel low-complexity iterative receiver for coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is proposed in this letter. The iterative receiver uses the parallel interference cancellation (PIC)-maximum ratio combining (MRC) detector for MIMO-OFDM detection, which is a popular alternative to the minimum mean square error (MMSE) detector due to its lower computational complexity. However, we have found that the conventional PIC-MRC detector tends to underestimate the magnitude of its output log likelihood ratios (LLRs). Based on this discovery, we propose to multiply these LLRs by a constant factor, which is optimized according to the extrinsic information transfer (EXIT) chart of the soft-in soft-out (SISO) detector. Simulation results show that the proposed scheme significantly improves the performance of the PIC-MRC-based receiver with little additional cost in computational complexity, allowing it to closely approach the performance of receiver using the much more complex MMSE detector.

Publication: IEICE TRANSACTIONS on Communications Vol.E90-B No.11 pp.3274-3277

Publication Date: 2007/11/01

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Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e90-b.11.3274

Type of Manuscript: LETTER

Category: Wireless Communication Technologies

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Wenfeng LIN, Chen HE, "Low-Complexity Iterative Receiver for Coded MIMO-OFDM Systems Based on PIC-MRC" in IEICE TRANSACTIONS on Communications, vol. E90-B, no. 11, pp. 3274-3277, November 2007, doi: 10.1093/ietcom/e90-b.11.3274.
Abstract: A novel low-complexity iterative receiver for coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is proposed in this letter. The iterative receiver uses the parallel interference cancellation (PIC)-maximum ratio combining (MRC) detector for MIMO-OFDM detection, which is a popular alternative to the minimum mean square error (MMSE) detector due to its lower computational complexity. However, we have found that the conventional PIC-MRC detector tends to underestimate the magnitude of its output log likelihood ratios (LLRs). Based on this discovery, we propose to multiply these LLRs by a constant factor, which is optimized according to the extrinsic information transfer (EXIT) chart of the soft-in soft-out (SISO) detector. Simulation results show that the proposed scheme significantly improves the performance of the PIC-MRC-based receiver with little additional cost in computational complexity, allowing it to closely approach the performance of receiver using the much more complex MMSE detector.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.11.3274/_p

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@ARTICLE{e90-b_11_3274,
author={Wenfeng LIN, Chen HE, },
journal={IEICE TRANSACTIONS on Communications},
title={Low-Complexity Iterative Receiver for Coded MIMO-OFDM Systems Based on PIC-MRC},
year={2007},
volume={E90-B},
number={11},
pages={3274-3277},
abstract={A novel low-complexity iterative receiver for coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is proposed in this letter. The iterative receiver uses the parallel interference cancellation (PIC)-maximum ratio combining (MRC) detector for MIMO-OFDM detection, which is a popular alternative to the minimum mean square error (MMSE) detector due to its lower computational complexity. However, we have found that the conventional PIC-MRC detector tends to underestimate the magnitude of its output log likelihood ratios (LLRs). Based on this discovery, we propose to multiply these LLRs by a constant factor, which is optimized according to the extrinsic information transfer (EXIT) chart of the soft-in soft-out (SISO) detector. Simulation results show that the proposed scheme significantly improves the performance of the PIC-MRC-based receiver with little additional cost in computational complexity, allowing it to closely approach the performance of receiver using the much more complex MMSE detector.},
keywords={},
doi={10.1093/ietcom/e90-b.11.3274},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - Low-Complexity Iterative Receiver for Coded MIMO-OFDM Systems Based on PIC-MRC
T2 - IEICE TRANSACTIONS on Communications
SP - 3274
EP - 3277
AU - Wenfeng LIN
AU - Chen HE
PY - 2007
DO - 10.1093/ietcom/e90-b.11.3274
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2007
AB - A novel low-complexity iterative receiver for coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is proposed in this letter. The iterative receiver uses the parallel interference cancellation (PIC)-maximum ratio combining (MRC) detector for MIMO-OFDM detection, which is a popular alternative to the minimum mean square error (MMSE) detector due to its lower computational complexity. However, we have found that the conventional PIC-MRC detector tends to underestimate the magnitude of its output log likelihood ratios (LLRs). Based on this discovery, we propose to multiply these LLRs by a constant factor, which is optimized according to the extrinsic information transfer (EXIT) chart of the soft-in soft-out (SISO) detector. Simulation results show that the proposed scheme significantly improves the performance of the PIC-MRC-based receiver with little additional cost in computational complexity, allowing it to closely approach the performance of receiver using the much more complex MMSE detector.
ER -