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IEEE International Conference on Communications (ICC)

作者： Zhao, Peiyao Qian, Chen Wang, Zhaocheng Dai, Linglong Chen, Sheng Tsinghua Univ Dept Elect Engn Tsinghtia Natl Lab Informat Sci & Technol TNList Beijing 100084 Peoples R China Univ Southampton Elect & Comp Sci Southampton SO17 1BJ Hants England King Abdulaziz Univ Fac Engn Jeddah 21589 Saudi Arabia

ISBN: (纸本)9781467364324

In this paper, we consider the low density parity check (LDPC) coded multi-input multi-output (MIMO) system with iterative detection and decoding (IDD). Since the traditional frame-by-frame receiver scheme suffers from a huge decoding delay, we propose an efficient scheme with a shuffled structure between the demapper and decoder, which adopts group vertical shuffled belief propagation (BP) algorithm. The proposed shuffled iterative receiver converges faster and significantly reduces the delay introduced by the IDD process. Simulation results demonstrate that our proposed shuffled iterative receiver exhibits several tenths dB of signal-to-noise ratio gain in comparison to the existing schemes, while imposing a much lower average number of iterations for the IDD process.

关键词： iterative detection and decoding MIMO shuffled iterative receiver LDPC code shuffled BP algorithm

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Robust Multiuser Binary CPM detection with Unkown modulation index 23

Robust Multiuser Binary CPM Detection with Unkown modulation...

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23rd European Signal Processing Conference (EUSIPCO)

作者： Messai, Malek Guilloud, Frederic Amis, Karine Colavolpe, Giulio Telecom Bretagne Inst Telecom Signal & Commun Dept CNRSLab STICCUMR 6285 F-29200 Brest France Univ Parma Dipartitnento Ingn Informaz I-43124 Parma Italy

ISBN: (纸本)9780992862633

We develop a robust multiuser detector for a Frequency Division Multiplexing (FDM) system where each user employs a binary continuous phase modulation (CPM) generated through a low-cost transmitter, thus characterized by a significant modulation index uncertainty, and sent over a channel affected by phase noise. In this FDM system the spectral efficiency can be increased by reducing the spacing between two adjacent channels. The proposed receiver is designed by adopting a simplified representation of a binary CPM signal with the principal component of its Laurent decomposition and is obtained by using the framework based on factor graphs and the sum-product algorithm. This detector can be used for iterative detection/decoding of a coded scheme in which each user employs a binary CPM modulator serially concatenated with an outer encoder through a pseudo-random interleaver. It does not require an explicit estimation of the modulation index nor of the channel phase and is very robust to large uncertainties of the nominal value of the modulation index.

关键词： Continuous phase modulation CPM-FDM frequency spacing spectral efficiency modulation index mismatch phase noise factor graph sum product iterative detection and decoding

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Shuffled iterative Receiver for LDPC-Coded MIMO Systems

Shuffled Iterative Receiver for LDPC-Coded MIMO Systems

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IEEE International Conference on Communications

作者： Peiyao Zhao Chen Qian Zhaocheng Wang Linglong Dai Sheng Chen Tsinghua National Laboratory for Information Science and Technology (TNList) Department of Electronic Engineering Tsinghua University Electronics and Computer Science University of Southampton

ISBN: (纸本)9781467364300

关键词： iterative detection and decoding MIMO Shuffled iterative receiver LDPC code Shuffled BP algorithm

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Robust Multiuser Binary CPM detection with Unkown modulation index

Robust Multiuser Binary CPM Detection with Unkown modulation...

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European Signal Processing Conference

作者： Malek MESSAI Frederic GUILLOUD Karine AMIS Giulio COLAVOLPE Signal and Communication Department of Telecom Bretagne-Institut Telecom CNRS Lab-STICC (UMR 6285) Universita di Parma Dipartimento di Ingegneria dell'Informazione

ISBN: (纸本)9781479988518

关键词： Continuous phase modulation CPM-FDM Frequency spacing Spectral efficiency Modulation index mismatch Phase noise Factor graph Sum product iterative detection and decoding Factor Graph continuous phase modulation Phase noise spectral efficiency Critical path method Frequency division multiplexing Binary

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New detection algorithms based on the jointly Gaussian approach and successive interference cancelation for iterative MIMO systems

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INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 2014年第10期27卷 1964-1983页

作者： Wu, Jie Zhong, Jie Cai, Yunlong Zhao, Minjian Zhang, Wenyan Zhejiang Univ Dept Informat Sci & Elect Engn Hangzhou 310027 Zhejiang Peoples R China

A new detection algorithm based on the jointly Gaussian approach (JGA) and successive interference cancelation (SIC), named the SIC-JGA algorithm, is proposed for iterative MIMO systems. Both the a priori symbol estimates of the undetected layers and the a posteriori symbol estimates of the previously detected layers are used in the SIC process. To reduce the complexity of covariance matrix inversion in the proposed algorithm, simplified algorithms named S-SIC-JGA are investigated for both the single path and multipath block fading channels under M Phase Shift Keying modulations. A detailed complexity analysis is presented for both the SIC-JGA and S-SIC-JGA algorithms. Numerical results exhibit that the system using the SIC-JGA algorithm outperforms the JGA algorithm, with an additional complexity for determining the detection order of SIC. The S-SIC-JGA algorithm has a much lower complexity compared with the SIC-JGA algorithm while experiencing an acceptable system performance degradation. Proper detection algorithms can be chosen in different iterations to balance the system performance and the detection complexity. Copyright (C) 2012 John Wiley & Sons, Ltd.

关键词： iterative detection and decoding MIMO systems jointly Gaussian approach successive interference cancelation low-complexity detector

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Communications over phase noise channels: a tutorial review

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING 2014年第3期32卷 167-185页

作者： Colavolpe, Giulio Univ Parma Dipartimento Ingn Informaz I-43100 Parma Italy

In this tutorial paper, we first review the main information-theoretic results on channels affected by a time-varying phase noise. The main maximum a posteriori symbol detection algorithms to be employed in such a challenging scenario are then described considering linear modulations and advanced coding schemes based on iterative detection and decoding. The role of pilot symbols will be also discussed. Copyright (C) 2013 John Wiley & Sons, Ltd.

关键词： information rate iterative detection and decoding phase noise

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Efficient Soft-Input Soft-Output detection of Dual-Layer MIMO Systems

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IEEE WIRELESS COMMUNICATIONS LETTERS 2014年第5期3卷 541-544页

作者： Gomaa, Ahmad Jalloul, Louay M. A. Broadcom Corp Mobile & Wireless Grp Sunnyvale CA 94086 USA

Adual-layer multiple-input multiple-output (MIMO) system with multi-level modulation is considered. A computationally efficient soft-input soft-output receiver based on the exact max-log maximum a posteriori (max-log-MAP) principle is presented in the context of iterative detection and decoding. We show that the computational complexity of our exact max-log-MAP solution grows linearly with the constellation size and is also less than that of the best known methods of Turbo-LORD that only provide approximate solutions. Using decoder feedback to change the decision thresholds of the constellation symbols, we show that the exhaustive search operation boils down to a simple slicing operation.

关键词： Soft-input soft-output MIMO detector exact max-log-MAP iterative detection and decoding turbo equalization MIMO-OFDM

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iterative Multiuser detection and decoding for DS-CDMA System With Space-Time Linear Dispersion

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2009年第5期58卷 2343-2353页

作者： Xiao, Pei Wu, Jinsong Sellathurai, Mathini Ratnarajah, T. Strom, Erik G. Queens Univ Belfast Sch Elect Elect Engn & Comp Sci Inst Elect Commun & Informat Technol Belfast BT3 9DT Antrim North Ireland Queens Univ Dept Elect & Comp Engn Kingston ON K7L 3N6 Canada Chalmers Univ Technol Div Commun Syst & Informat Theory Dept Signals & Syst S-41296 Gothenburg Sweden

This paper considers a Q-ary orthogonal direct-sequence code-division multiple-access (DS-CDMA) system with high-rate space-time linear dispersion codes (LDCs) in time-varying Rayleigh fading multiple-input-multiple-output (MIMO) channels. We propose a joint multiuser detection, LDC decoding, Q-ary demodulation, and channel-decoding algorithm and apply the turbo processing principle to improve system performance in an iterative fashion. The proposed iterative scheme demonstrates faster convergence and superior performance compared with the V-BLAST-based DS-CDMA system and is shown to approach the single-user performance bound. We also show that the CDMA system is able to exploit the time diversity offered by the LDCS in rapid-fading channels.

关键词： Code-division multiple access (CDMA) iterative detection and decoding linear dispersion codes (LDCs) multiple-input-multiple-output (MIMO) multiuser detection (MUD)

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A Component-level Soft Interference Cancellation Based iterative detection Algorithm for Coded MIMO Systems 80

A Component-level Soft Interference Cancellation Based Itera...

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80th IEEE Vehicular Technology Conference (VTC Fall)

作者： Xu, Jin Dai, Xiaoming Ma, Weiguo Wang, Yingmin Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing 100088 Peoples R China China Acad Telecommun Technol State Key Lab Wireless Mobile Commun Beijing Peoples R China

ISBN: (纸本)9781479944491

An iterative detection and decoding (IDD) scheme based on component-level soft cancellation (CLSC) and linear minimum mean-squared error (LMMSE) filtering for turbo coded multiple input multiple output (MIMO) multiplexing systems is proposed in this work. By exploiting the independence between the In-phase and Quadrature-phase branch, more accurate soft interference cancellation is realized. Extrinsic information transfer (EXIT) characteristics of the IDD system show that the proposed scheme exhibit faster convergence speed than the conventional one. Numerical results validate that the CLSC-LMMSE based detection algorithm achieves noticeable bit error rate (BER) performance over symbol-level soft cancelation (SLSC) based one, with only marginal complexity increase.

关键词： component-level soft interference cancellation multiple input multiple output soft feedback iterative detection and decoding

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A Component-level Soft Interference Cancellation Based iterative detection Algorithm for Coded MIMO Systems

A Component-level Soft Interference Cancellation Based Itera...

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IEEE Vehicular Technology Conference

作者： Jin Xu Xiaoming Dai Weiguo Ma Yingmin Wang School of Information and Communication Engineering Beijing University of Posts and Telecommunications State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunications Technology

ISBN: (纸本)9781479944484

关键词： Component-level soft interference cancellation Multiple input multiple output Soft feedback iterative detection and decoding

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