Code-Aided Channel Estimation in LDPC-Coded MIMO Systems

Binghui Shi; Yongpeng Wu; Peihong Yuan; Derrick Wing Kwan Ng; Xiang Gen Xia; Wenjun Zhang

doi:10.1109/LWC.2023.3333416

Code-Aided Channel Estimation in LDPC-Coded MIMO Systems

Binghui Shi, Yongpeng Wu^*, Peihong Yuan, Derrick Wing Kwan Ng, Xiang Gen Xia, Wenjun Zhang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

For a multiple-input multiple-output (MIMO) system with unknown channel state information (CSI), a novel low-density parity check (LDPC)-coded transmission (LCT) scheme with joint pilot and data channel estimation is proposed. To fine-tune the CSI, a method based on the constraints introduced by the coded data from an LDPC code is designed such that the MIMO detector exploits the fine-tuned CSI. For reducing the computational burden, a coordinate ascent algorithm is employed along with several approximation methods, effectively reducing the required times of MIMO detection and computational complexity to achieve a satisfying performance. Simulation results utilizing WiMAX standard LDPC codes and quadrature phase-shift keying (QPSK) modulation demonstrate gains of up to 1.3 dB at a frame error rate (FER) of 10-4 compared to pilot-assisted transmission (PAT) over Rayleigh block-fading channels.

Original language	English
Pages (from-to)	491-495
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	13
Issue number	2
DOIs	https://doi.org/10.1109/LWC.2023.3333416
Publication status	Published - 1 Feb 2024
Externally published	Yes

Keywords

LDPC codes
channel estimation
fading channel
multiple-input multiple-output (MIMO) system
pilotassisted transmission (PAT)

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10.1109/LWC.2023.3333416

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title = "Code-Aided Channel Estimation in LDPC-Coded MIMO Systems",

abstract = "For a multiple-input multiple-output (MIMO) system with unknown channel state information (CSI), a novel low-density parity check (LDPC)-coded transmission (LCT) scheme with joint pilot and data channel estimation is proposed. To fine-tune the CSI, a method based on the constraints introduced by the coded data from an LDPC code is designed such that the MIMO detector exploits the fine-tuned CSI. For reducing the computational burden, a coordinate ascent algorithm is employed along with several approximation methods, effectively reducing the required times of MIMO detection and computational complexity to achieve a satisfying performance. Simulation results utilizing WiMAX standard LDPC codes and quadrature phase-shift keying (QPSK) modulation demonstrate gains of up to 1.3 dB at a frame error rate (FER) of 10-4 compared to pilot-assisted transmission (PAT) over Rayleigh block-fading channels.",

keywords = "LDPC codes, channel estimation, fading channel, multiple-input multiple-output (MIMO) system, pilotassisted transmission (PAT)",

author = "Binghui Shi and Yongpeng Wu and Peihong Yuan and Ng, {Derrick Wing Kwan} and Xia, {Xiang Gen} and Wenjun Zhang",

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T1 - Code-Aided Channel Estimation in LDPC-Coded MIMO Systems

AU - Shi, Binghui

AU - Wu, Yongpeng

AU - Yuan, Peihong

AU - Ng, Derrick Wing Kwan

AU - Xia, Xiang Gen

AU - Zhang, Wenjun

PY - 2024/2/1

Y1 - 2024/2/1

N2 - For a multiple-input multiple-output (MIMO) system with unknown channel state information (CSI), a novel low-density parity check (LDPC)-coded transmission (LCT) scheme with joint pilot and data channel estimation is proposed. To fine-tune the CSI, a method based on the constraints introduced by the coded data from an LDPC code is designed such that the MIMO detector exploits the fine-tuned CSI. For reducing the computational burden, a coordinate ascent algorithm is employed along with several approximation methods, effectively reducing the required times of MIMO detection and computational complexity to achieve a satisfying performance. Simulation results utilizing WiMAX standard LDPC codes and quadrature phase-shift keying (QPSK) modulation demonstrate gains of up to 1.3 dB at a frame error rate (FER) of 10-4 compared to pilot-assisted transmission (PAT) over Rayleigh block-fading channels.

AB - For a multiple-input multiple-output (MIMO) system with unknown channel state information (CSI), a novel low-density parity check (LDPC)-coded transmission (LCT) scheme with joint pilot and data channel estimation is proposed. To fine-tune the CSI, a method based on the constraints introduced by the coded data from an LDPC code is designed such that the MIMO detector exploits the fine-tuned CSI. For reducing the computational burden, a coordinate ascent algorithm is employed along with several approximation methods, effectively reducing the required times of MIMO detection and computational complexity to achieve a satisfying performance. Simulation results utilizing WiMAX standard LDPC codes and quadrature phase-shift keying (QPSK) modulation demonstrate gains of up to 1.3 dB at a frame error rate (FER) of 10-4 compared to pilot-assisted transmission (PAT) over Rayleigh block-fading channels.

KW - LDPC codes

KW - channel estimation

KW - fading channel

KW - multiple-input multiple-output (MIMO) system

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SP - 491

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JO - IEEE Wireless Communications Letters

JF - IEEE Wireless Communications Letters

IS - 2

ER -

Code-Aided Channel Estimation in LDPC-Coded MIMO Systems

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Keywords

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