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IEEE Wireless Communications and Networking Conference

作者： Hedayat, A Shah, H Nosratinia, A Univ Texas Multimedia Commun Lab Richardson TX 75083 USA

ISBN: (纸本)0780389662

The performance of space-time codes under channel correlation has been studied in detail recently, and a variety of results have been produced. In this work, we simplify some of the existing derivations as well as present some new results. One of the novel issues raised in this investigation is the loss of Uniform Error Probability (UEP) property of many codes in the presence of transmit side correlation. Also our error expressions for the general case of jointly spatio-temporally correlated Rayleigh and Rician fading are new, to the best of our knowledge. We also apply our analysis to some of the more recently developed codes for the MIMO channel, including the super-orthogonal codes and the linear dispersion codes.

关键词： fading channels MIMO systems trellis codes space-time codes block codes covariance matrices error statistics linear codes correlated fading channels trellis space-time codes orthogonal block codes spatial correlation covariance matrix space-time signaling uniform error probability transmit side correlation jointly spatio-temporally correlated channels Rayleigh fading Rician fading super-orthogonal codes linear dispersion codes multiple input multiple output systems Rician fading correlated fading channel variance covariance matrix space-time codes Trellis codes linear codes Block codes Covariance matrix Rayleigh fading Fading channels linear dispersion time signal differential space-time coding

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The differential Transmitter and Receiver for Cognitive MIMO Systems

The Differential Transmitter and Receiver for Cognitive MIMO...

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IET 3rd International Conference on Wireless, Mobile and Multimedia Networks

作者： Liu, Jing Hu, Shaohai Xiao, Yang Liu, Xiaoli Lee, Moon Ho Kim, Kiseon Beijing Jiaotong Univ Inst Informat Sci Beijing Peoples R China Chonbuk Natl Univ Div Elect & Informat Engn Jeonju 561756 South Korea Gwangju Inst Sci & Technol Dept Informat & Commun Gwangju 500712 South Korea

ISBN: (纸本)9781849192408

In this paper, a cognitive MIMO system with differential space-time coding is proposed, in which the cognitive link communicates using two transmission antennas and one receiving antenna Cognitive MIMO systems allow the licensed spectrum to be opportunistically exploited by the cognitive user, so they enable public access to the underutilized spectral bands and therefore the overall spectral efficiency can be economically increased While in some situations, such as high-mobility environment or channel fading rapidly, It may be difficult and costly to estimate the channel accurately for cognitive MIMO systems To solve the problem, differential space-time coding scheme has been proposed for cognitive MIMO systems The construction of the differential transmitter and receiver for the cognitive MIMO system is provided.

关键词： cognitive radio differential space-time coding transmittre receiver MIMO

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A Simple Decision-Feedback Block differential Detection Scheme for DSTBC 79

A Simple Decision-Feedback Block Differential Detection Sche...

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IEEE 79th Vehicular Technology Conference (VTC-Spring)

作者： Kubo, Hiroshi Ritsumeikan Univ Fac Sci & Engn Dept Elect & Comp Engn Kusatsu Siga 5258577 Japan

ISBN: (纸本)9781479944828

For differential space-time block coding (DSTBC), this paper proposes a simple decision-feedback block differential detection (DFBDD) scheme with small computational complexity, in order to improve tracking capability on fast time-varying fading channels. Decisions can be derived directly without computation of metrics in the proposed DFBDD. It can also employ higher-order channel prediction, which needs neither complex trellis search algorithms nor complex channel prediction recursive algorithms. Finally, computer simulation results confirm that the proposed DFBDD with higher-order channel prediction has higher tracking capability at low computational complexity than the conventional block differential detection without channel prediction.

关键词： multiple-input multiple-output differential space-time coding decision-feedback higher-order channel prediction fast time-varying fading

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Censored distributed space-time coding for wireless sensor networks

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EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2008年第unknown期2008卷 127689-1-127689-9-0页

作者： Yiu, S. Schober, R. Univ British Columbia Dept Elect & Comp Engn Vancouver BC V6T 1Z4 Canada

We consider the application of distributed space-time coding in wireless sensor networks (WSNs). In particular, sensors use a common noncoherent distributed space-time block code (DSTBC) to forward their local decisions to the fusion center (FC) which makes the final decision. We show that the performance of distributed space-time coding is negatively affected by erroneous sensor decisions caused by observation noise. To overcome this problem of error propagation, we introduce censored distributed space-time coding where only reliable decisions are forwarded to the FC. The optimum noncoherent maximum-likelihood and a low-complexity, suboptimum generalized likelihood ratio test (GLRT) FC decision rules are derived and the performance of the GLRT decision rule is analyzed. Based on this performance analysis we derive a gradient algorithm for optimization of the local decision/censoring threshold. Numerical and simulation results show the effectiveness of the proposed censoring scheme making distributed space-time coding a prime candidate for signaling in WSNs. Copyright (C) 2008.

关键词： time coding algorithm optimization noncoherent Error propagation decision rule Distribute differential space-time coding space-time coding

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Enhanced Mobile Digital Video Broadcasting with Distributed space-time coding

Enhanced Mobile Digital Video Broadcasting with Distributed ...

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IEEE International Conference on Communications

作者： Ming Liu Matthieu Crussiere Maryline Helard Jean-Francois Helard Youssef Nasser Universite Europeenne de Bretagne (UEB) INSA American University of Beirut ECE Department

ISBN: (纸本)9781457720529

This paper investigates the distributed space-time (ST) coding proposals for the future Digital Video Broadcasting-Next Generation Handheld (DVB-NGH) standard. We first theoretically show that the distributed MIMO scheme is the best broadcasting scenario in terms of channel capacity. Consequently we evaluate the performance of several ST coding proposals for DVB-NGH with practical system specifications and channel conditions. Simulation results demonstrate that the 3D code is the best ST coding solution for broadcasting in the distributed MIMO scenario.

关键词： broadcasting digital video broadcasting Distribute system specifications space-time coding time coding differential space-time coding Channel capacity multiple input multiple output systems

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Self-Coded Distributed space-time coding for Two-way Full-Duplex Relay Networks

Self-Coded Distributed Space-Time Coding for Two-way Full-Du...

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IEEE Global Communications Conference

作者： Yi Liu Xiang-Gen Xia Zhiqiang Zhang Hailin Zhang State Key Laboratory of Integrated Service Network Xidian University Department of Electrical and Computer Engineering University of Delaware

ISBN: (纸本)9781479959532

In this paper, we consider two-way full-duplex (FD) relay networks, which allow relaying communications in both directions at the same time and over the same frequency band. We propose a distributed space-time coding scheme, which we call SC-DSTC (Self-Coded Distributed space-time coding), where the main idea is to perform convolutional encoding at the relay node and form a distributed linear convolutional space-time code (DLC-STC) together with the direct link. The convolutional code at the relay is realized by using part of the residual loop interference (RLI), which produces an automatic convolutional encoder. The amplifying factor is optimized when the loop channel information is imperfect. Simulation results show that the proposed SC-DSTC scheme can achieve asynchronous full cooperative diversity and is robust to the error of the loop channel information.

关键词： time coding space-time coding differential space-time coding Trunk Node Relay networks FULL DUPLEX convolutional coding Distribute Bidirectional relay

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The differential Transmitter and Receiver for Cognitive MIMO Systems

The Differential Transmitter and Receiver for Cognitive MIMO...

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2010 The IET 3rd International Conference on Wireless,Mobile & Multimedia Networks(第三届IET无线移动及多媒体网络国际会议 ICWMMN 2010)

作者： Jing Liu Xiaoli Liu Shaohai Hu Yang Xiao Moon Ho Lee Kiseon Kim Institute of Information Science Beijing Jiaotong University Beijing China Division of Electronics and Information Engineering Chonbuk National University Jeonju 561-756 Kor Dept.of Information and Communications Gwangju Institute of Science and Technology Gwangju 500-712

ISBN: (纸本)9781849192408

In this paper, a cognitive MIMO system with differential space-time coding is proposed, in which the cognitive link communicates using two transmission an-tennas and one receiving antenna. Cognitive MIMO sys-tems allow the licensed spectrum to be opportunistically exploited by the cognitive user, so they enable public access to the underutilized spectral bands and therefore the overall spectral efficiency can be economically in-creased. While in some situations, such as high-mobility environment or channel fading rapidly, it may be difficult and costly to estimate the channel accurately for cognitive MIMO systems. To solve the problem, differential space-time coding scheme has been proposed for cognitive MIMO systems. The construction of the differential transmitter and receiver for the cognitive MIMO system is provided.

关键词： cognitive radio differential space-time coding transmittre receiver MIMO

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Distributed space-time coding in Two-Way Fixed Gain Relay Networks over Nakagami-m Fading

Distributed Space-Time Coding in Two-Way Fixed Gain Relay Ne...

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IEEE International Conference on Communications

作者： Trung Q. Duong Hien Quoc Ngo Hans-Jurgen Zepernick Arumugam Nallanathan Blekinge Institute of Technology Linkoping University King's College London

ISBN: (纸本)9781457720529

The distributed Alamouti space-time code in two-way fixed gain amplify-and-forward (AF) relay is proposed in this paper. In particular, closed-form expressions for approximated ergodic sum-rate and exact pairwise error probability (PWEP) are derived for Nakagami-m fading channels. To reveal further insights into array and diversity gains, an asymptotic PWEP is also obtained. Finally, numerical results are provided to corroborate the proposed theoretical analysis.

关键词： Bidirectional Relay networks time coding space-time coding Gain Theoretical analysis Nakagami fading differential space-time coding fading color Fixed Distribute space-time codes Pairwise error probability Diversity methods

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