Code-Aided Channel Estimation in LDPC-Coded MIMO Systems

被引：0

作者：

Shi, Binghui ^{[1
]}

Wu, Yongpeng ^{[1
]}

Yuan, Peihong ^{[2
]}

Ng, Derrick Wing Kwan ^{[3
]}

Xia, Xiang-Gen ^{[4
]}

Zhang, Wenjun ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Minhang 200240, Peoples R China

[2] MIT, Res Lab Elect, Cambridge, MA 02139 USA

[3] Univ New South Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia

[4] Univ Delaware, Dept Elect & Comp Engn, Newark, DE 19716 USA

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2024年 / 13卷 / 02期

基金：

美国国家科学基金会;

关键词：

Parity check codes; Channel estimation; Symbols; MIMO communication; Decoding; Random variables; Phase shift keying; LDPC codes; fading channel; multiple-input multiple-output (MIMO) system; channel estimation; pilotassisted transmission (PAT); SEMI-BLIND; DESIGN;

D O I：

10.1109/LWC.2023.3333416

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：491 / 495

页数：5

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