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Design of LDPC Coded Multi-User Massive MIMO Systems With MMSE-Based Iterative joint detection and decoding

IEEE ACCESS 2023年 11卷 125492-125510页

作者： Park, Han Jin Lee, Jeong Woo Chung Ang Univ Sch Elect & Elect Engn Seoul 06974 South Korea

We design a low-density parity-check (LDPC) coded multi-user massive multiple-input multiple-output (MIMO) system to achieve a high error correcting capability with a fast convergence speed of iterative joint detection and decoding (JDD) process employing a low-complexity detection. Minimum mean squared error detection with parallel interference cancellation (MMSE-PIC) and its variations are considered as low-complexity linear detection algorithms. We provide a factor graph representation of LDPC coded multi-user massive MIMO system using JDD algorithm employing MMSE-PIC detection, and we formulate updating rules of messages flowing in the JDD process. We propose a practical and efficient tool for analyzing the extrinsic information transfer (EXIT) characteristics of messages exchanged between detector and decoder, based on which LDPC codes and JDD strategy are jointly designed to result in a low bit error rate (BER) and a fast convergence speed of JDD mechanism. It is observed that the error correcting capability and JDD convergence behavior predicted by the proposed analysis tool match well the actual performances obtained by simulations. It is also observed that LDPC coded multi-user massive MIMO system employing LDPC codes and JDD strategy designed optimally by the proposed EXIT analysis tool achieves a lower BER with a faster convergence speed.

关键词： INDEX TERMS Coded multi-user massive-MIMO LDPC codes joint detection and decoding MMSE-PIC EXIT analysis

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joint detection and decoding for Non-Binary LDPC Coded MIMO Systems 12

Joint Detection and Decoding for Non-Binary LDPC Coded MIMO ...

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2017 IEEE 12th International Conference on ASIC

作者： Yiqian Cai Jin Sha Shusen Jing Xiaohu You Chuan Zhang Lab of Efficient Architectures for Digital-communication and Signal-processing(LEADS) National Mobile Communications Research Laboratory Southeast University School of Electronic Science and Engineering Nanjing University

ISBN: (纸本)9781509066261;9781509066254

Due to its outstanding spectral efficiency,multipleinput and multiple-output(MIMO) technology has been developed and drawn increasing attentions for recent *** balancing complexity and performance,K-best algorithm has become one of the most favorable MIMO *** this paper,a joint detection and decoding(JDD) for non-binary LDPC(NB-LDPC) coded MIMO systems has been proposed with better performance compared to the existing K-best detection,which prunes the tree-search with NB-LDPC coding *** results have demonstrated that the JDD system with8 × 8 MIMO and GF(4)(8,2) NB-LDPC code can achieve up to4 d B gain at BER = 2 × 10-2 compared to the state-of-the-art(SOA) *** architecture and schedule analysis have shown the advantages and feasibility of proposed JDD.

关键词： MIMO K-best non-binary LDPC code joint detection and decoding

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joint detection and decoding of Polar-Coded SCMA Systems 9

Joint Detection and Decoding of Polar-Coded SCMA Systems

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9th International Conference on Wireless Communication and Signal Processing (WCSP)

作者： Jing, Shusen Yang, Chao Yang, Junmei You, Xiaohu Zhang, Chuan Lab Efficient Architectures Digital Commun & Sign Nanjing Jiangsu Peoples R China Southeast Univ Natl Mobile Commun Res Lab Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781538620625

Sparse-code multiple-access (SCMA) is a novel multiplexing method to increase the capacity of wireless communication systems. By giving users non-orthogonal codebook with few non-zero entries, the SCMA approach can highly improve the spectral efficiency, compared with traditional orthogonal ones such as CDMA, with tolerable detection complexity. Therefore, it has been considered as an option for 5G air-interface technique. Also essential in 5G, polar code has already been adopted by 5G eMBB control channel, for its capacity-achieving capability. In this work, a joint detection and decoding (JDD) method of polar-coded SCMA system is proposed for the first time, which can highly improve the performance of the polar-SCMA systems. By merging two factor graphs together, the intrinsic messages can be exchanged iteratively to help the likelihood messages converge. Numerical results have shown that, compared to separated detection and decoding (SDD), JDD can achieve remarkable performance gain little complexity overhead. Hardware architecture is also presented in this paper to demonstrate the feasibility of the proposed JDD scheme.

关键词： SCMA detection polar codes factor graph belief propagation joint detection and decoding

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joint detection and decoding Schemes for Turbo coded SCMA systems

Joint detection and decoding Schemes for Turbo coded SCMA sy...

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IEEE-Communications-Society Global Communications Conference on Trusted Communications with Physical Layer Security (IEEE GLOBECOM)

作者： Zhang, Zhenbing Han, Kaining Hu, Jianhao Chen, Jienan Univ Elect Sci & Technol China UESTC Natl Key Lab Commun Chengdu Peoples R China

ISBN: (纸本)9781509024827

Sparse code multiple access (SCMA) is a research hotspot in recent years. In this paper, we proposed a joint SCMA detection and Turbo decoding (JDD) scheme for the SCMA system. The proposed method integrates the message passing between SCMA detector and turbo decoder into the factor graph of the SCMA detector to construct a joint factor graph. Simulation results show the JDD scheme has 1.6 dB performance gain compared to the iterative detection and decoding (IDD) scheme. Moreover, it has only 0.2 dB performance loss compared to the single user QPSK system. To further reduce the computational complexity of the JDD scheme, we implement the JDD scheme in the logarithm domain (LOG-JDD) with the same performance compared with the IDD scheme. A technology that can improve the convergence is used to improve the bit error rate (BER) performance. Simulation results show that a suitable damping factor can obtain about 1dB performance gain compared with the IDD scheme.

关键词： Sparse code multiple access joint detection and decoding high performance low computational complexity

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Tree Search Based Configurable joint detection and decoding Algorithms for MIMO Systems

Tree Search Based Configurable Joint Detection and Decoding ...

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International Conference on Computing, Networking and Communications (ICNC)

作者： Huang, Chien-Hao Yu, Chia-Po Shen, Chung-An Natl Taiwan Univ Sci & Technol Dept Elect & Comp Engn Taipei Taiwan

ISBN: (纸本)9781467385794

It has been shown that the Configurable joint detection-decoding (CJDD) algorithms in MIMO systems can effectively reduce the complexity and improve the signal quality. Since the CJDD approach is based on the tree search algorithms and there exists various kinds of such methods with different characteristics, it is of great importance to explore the trade-offs between each algorithm and their impacts on different aspects of system performances. In this paper, we study the CJDD algorithm based on three types of tree search approaches: breadth-first search, depth-first search, and the Fano algorithm. We explicitly elucidate the advantages and disadvantages of each algorithm on the basis of timing complexity, area complexity, and run-time variability. Our goal is to shed more lights on the design and application of tree search type approaches on the MIMO wireless communication systems for different system design considerations.

关键词： MIMO joint detection and decoding tree search algorithm

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A High Performance joint detection and decoding scheme for LDPC coded SCMA system

A High Performance Joint Detection and Decoding scheme for L...

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IEEE-Communications-Society Global Communications Conference on Trusted Communications with Physical Layer Security (IEEE GLOBECOM)

作者： Han, Kaining Zhang, Zhenbing Hu, Jianhao Chen, Jienan Univ Elect Sci & Technol China Natl Key Lab Commun Chengdu Sichuan Peoples R China

ISBN: (纸本)9781509024827

Sparse Code Multiple Access (SCMA) is a promising candidate multiple access technology for the fifth generation (5G) mobile communication system. In this paper, we propose a factor graph based high performance joint detection and decoding scheme (JDD) for the Low Density Parity Check code (LDPC) coded SCMA system. Also, we propose a message damping aided reduced complexity JDD scheme (RC-JDD) to achieve a lower complexity. According to the simulation results, the proposed JDD scheme has 2.6dB Bit Error Rate (BER) performance gain compared with the traditional methods and approximates to the single user detection performance bound with only 0.5dB loss. The RC-JDD scheme has only 10% complexity of JDD scheme with only 0.5dB loss. Thus the proposed RC-JDD scheme can be a good candidate for 5G system.

关键词： joint detection and decoding Sparse Code Multiple Access Low Density Parity Check Code 5G

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joint detection and decoding in LDPC-Based Space-Time Coded MIMO-OFDM Systems via Linear Programming

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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2015年第13期63卷 3411-3424页

作者： Wang, Kun Shen, Hong Wu, Wenhao Ding, Zhi Univ Calif Davis Dept Elect & Comp Engn Davis CA 95616 USA Southeast Univ Natl Mobile Commun Res Lab Nanjing 210096 Jiangsu Peoples R China ShanghaiTech Univ Shanghai 200031 Peoples R China

This work proposes a novel linear programming approach for the joint detection and decoding of LDPC-based space-time (ST) coded signals in multi-antenna orthogonal frequency division multiplexing (OFDM) systems. While traditional receivers typically decouple the detection and decoding processes as two disjunctive blocks or require iterative turbo exchange of extrinsic information between the soft detector and decoder, we formulate a joint linear program (LP) by exploiting the constraints imposed on the data symbols, training symbols, noise subspace as well as channel code. In consideration of the vast amount of LDPC parity check inequalities, we further present an adaptive procedure to significantly reduce the complexity of the joint LP receiver. Our LP-based receivers outperform existing receivers with substantial performance gains. Moreover, the proposed joint LP receiver demonstrates strong robustness when pilot symbols are sparsely arranged on subcarriers.

关键词： Linear programming LDPC space-time code joint detection and decoding MIMO-OFDM

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joint detection and decoding Schemes for Turbo coded SCMA systems

Joint detection and decoding Schemes for Turbo coded SCMA sy...

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IEEE Globecom Workshops

作者： Zhenbing Zhang Kaining Han Jianhao Hu Jienan Chen Nat. key Lab. Of Commun. Univ. of Electron. Sci. & Technol. of China Chengdu China

ISBN: (纸本)9781509024834