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Performance of Cross-Layer Design with Antenna Selection and Imperfect Feedback Information inMIMO Systems

INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION 2012年第unknown期2012卷 328457.1-328457.9页

作者： Dang, Xiaoyu Yu, Xiangbin Chen, Xiaomin Nanjing Univ Aeronaut & Astronaut Coll Elect & Informat Engn Nanjing 210016 Jiangsu Peoples R China

By combining adaptive modulation and automatic repeat request, a cross-layer design (CLD) scheme for MIMO system with antenna selection (AS) and imperfect feedback is presented, and the corresponding performance is studied. Subject to a target packet loss rate and fixed power constraint, the variable switching thresholds of fading gain are derived. According to these results, and using mathematical manipulation, the average spectrum efficiency (SE) and packet error rate (PER) of the system are further derived. As a result, closed-form expressions of the average SE and PER are obtained, respectively. These expressions include the expressions under perfect channel state information as special cases and provide good performance evaluation for the system. Numerical results show that the proposed CLD scheme with antenna selection has higher SE than the existing CLD scheme with space-time block coding, and the CLD scheme with variable switching thresholds outperforms that with conventional-fixed switching thresholds.

关键词： Error analysis Channel state information ANTENNA multiple input multiple output systems Imperfect space time block coding feedback information Variable Performance Evaluation layer design Cross layer design Selenium antennae

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Low complexity decoders for combined space time block coding and V-BLAST

Low complexity decoders for combined space time block coding...

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IEEE Wireless Communications and Networking Conference

作者： Sandeep, G. Teja, C. Ravi Krishnan, G. Kalyana Reddy, V. U. Int Inst Informat Technol Gachibowli Hyderabad 500032 Andhra Pradesh India Hellosoft India Pvt Ltd Hyderabad 500034 Andhra Pradesh India

ISBN: (纸本)9781424406586

Low complexity decoding schemes are presented for combined space time block coding and V-BLAST options in Enhanced Wireless Consortium draft [1] for IEEE 802.11n. We exploit the structure of the transmitted data in developing the schemes. They are introduced for a frequency flat fading scenario and the diversity orders they yield are analyzed. The techniques are extended to orthogonal frequency division multiplexing mode of baseband modulation, and the impact of spatial correlation among the antennas is studied. Simulations are used to validate the predicted performance of the proposed schemes, predicted from the diversity order analysis. Also, their performance is compared with that of Zero Forcing Successive Interference Cancellation (ZF-SIC). Computational complexities of the proposed as well as that of ZF-SIC are evaluated. The results show that one of the proposed schemes performs like ZF-SIC while its computational complexity is about one-half of that of ZF-SIC. Simulations with TGn channels [2], which are frequency selective channels and have spatial correlation, show that the performance degrades with increasing correlation.

关键词： OFDM modulation block codes communication complexity decoding fading channels interference suppression space-time codes V-BLAST ZF-SIC computational complexity diversity order analysis frequency flat fading channels low complexity decoders orthogonal fre V-BLAST Orthogonal frequency division multiplexing space time block coding complexity classes communication complexity space-time codes block codes suppression of interference Fading channels DEcoding baseband modulation

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A Full Diversity PIC Group Decoding for A Family of space-time block Codes

A Full Diversity PIC Group Decoding for A Family of Space-Ti...

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IEEE International Conference on Communications (ICC)

作者： Xu, Tianyi Xia, Xiang-Gen Zhang, Wei Univ Delaware Dept Elect & Comp Engn Newark DE 19716 USA Chonbuk Natl Univ Jeonju South Korea Univ New South Wales Sch Elect Engn & Telecommun Sydney NSW 2052 Australia

ISBN: (纸本)9781457720536

A partial interference cancellation (PIC) group decoding as well as a full diversity design criterion were recently proposed for space-time block code. The PIC group decoding complexity is between the lowest linear decoding complexity and the highest ML decoding complexity, and so is the code rate. Based on the criterion for the PIC group decoding, families of space-time block codes were also proposed recently. However, the interference cancellation operator is hard to determine and with the direct zero-forcing (ZF) PIC group decoding, these codes may not achieve the full diversity. In this paper, we propose a new PIC group decoding method for these existing codes, which has a similar decoding complexity to the ZF PIC group decoding, but achieves full diversity (or nearly).

关键词： DEcoding Punctate inner choroidopathy code rate block codes space time block coding

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Adaptive trace-orthonormal STBC for MIMO system with capacity approaching FEC codes

Adaptive trace-orthonormal STBC for MIMO system with capacit...

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IEEE Vehicular Technology Conference

作者： A. El Falou C. Langlais C. Abdel Nour C. Douillard Institut Telecom Telecom Bretagne Electronics Department Technopole Brest Iroise CS 83818 Universite europeenne de Bretagne

ISBN: (纸本)9781467318808

space time block codes (STBCs) are commonly designed according to the rank-determinant criteria, suitable for high signal to noise ratio (SNR) values. However, capacity approaching forward error correcting codes, used in practical communication systems, achieve iterative convergence at low to moderate SNR. In this paper we first present a non-asymptotic STBC design criterion based on the bitwise mutual information (BMI) maximization at a specific target SNR. According to this BMI criterion, we then optimize a trace-orthonormal-based STBC structure. Therefore, designed STBC becomes adaptive with respect to the SNR. Proposed adaptive trace-orthonormal STBC shows identical or better performance than 2×2 STBCs of a turbo-coded WiMAX system.

关键词： space time block coding signal to noise ratios Supernova remnants multiple input multiple output systems COMMUNICATION SYSTEMS Self tuning high SNR

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Collision Warning System in Dynamic Cooperative Environment with Alamouti STBC Algorithm

Collision Warning System in Dynamic Cooperative Environment ...

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IEEE Vehicular Technology Conference

作者： Chirag Warty Richard Wai Yu Stanford University NAVSEA - Port Hueneme

ISBN: (纸本)9781467318808

Emergency Medical Services (EMS) accident notification time is often delayed in areas with sparse cellular coverage and non-periodic communication access points. It is possible to mitigate such coverage gaps using cooperative communication which, by its distributed nature, does not rely on fixed base stations in remote areas. In the event of a collision EMS notification can be relayed through surrounding cellular equipped vehicles. This paper proposes a cooperative environment using Amplify and Forward (AF) protocol to communicate with the nearest accessible base station to transmit a collision message or even video for the first responders. The intent of the paper is to analyze the performance of different modulation techniques in this dynamic surrounding using Alamouti space-time block coding (STBC) scheme for achieving spatial diversity. Use of multiple relay antennas is used to improve the diversity. Data is encoded using a space-time block code, and then split into n streams which are simultaneously transmitted using n transmit antennas. The paper examines if the cooperative relaying technique outweighs the advantages of a fixed relay system due to the dynamic nature of the highway.

关键词： Cooperative communication Amplify-and-forward protocol Alamouti STBC scheme Multiple input Multiple output space time block coding fender system BASE STATION Relay systems collision warning cooperative communication Freeway notification COMMUNICATING Energy management systems European Monetary Union

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Experimental Verification of PER Performance of STBC-based Multi-hop Cooperative Relaying

Experimental Verification of PER Performance of STBC-based M...

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IEEE Vehicular Technology Conference

作者： Makoto Miyagoshi Hidekazu Murata Susumu Yoshida Koji Yamamoto Daisuke Umehara Satoshi Denno Masahiro Morikura Graduate School of Informatics Kyoto University Graduate School of Science and Technology Kyoto Institute of Technology Matsugasaki Graduate School of Natural Science and Technology Okayama University

ISBN: (纸本)9781467318808

In this paper, the end-to-end packet error rate (PER) performance of a space-time block code (STBC) based multi-hop cooperative relaying system is discussed. This system consists of a source, a destination, and two STBC based cooperative relays in each hop. These relays decode their received packets and forward the packets only when no error is found. In this system, there are conditions where the end-to-end PER performance improves with the number of hops. The theoretical end-to-end PER performance of this system have been derived analytically. However, in real-world wireless systems, various practical issues, e.g., timing synchronization and imperfect channel estimation, have a large impact on the performance. To confirm the end-to-end PER performance of this system in actual setup, an in-lab experiment using a fading emulator and four transceivers is performed under Rayleigh fading environment. The experimental results clarify the PER performance of the STBC based multi-hop cooperative relaying system. In addition, the theoretical PER performance is also verified from the experimental results.

关键词： end-to-end Spread spectrum communication relaying space time block coding clock recovery System performance IMPACT PROPERTIES Packet channel estimation Disorientation as to space

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Decoding of Distributed Alamouti STBC in DF Based Cooperative System

Decoding of Distributed Alamouti STBC in DF Based Cooperativ...

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IEEE Vehicular Technology Conference

作者： Ankur Bansal Manav R. Bhatnagar Are Hjorungnes Department of Electrical Engineering Indian Institute of Technology Delhi UNIK-University Graduate Center University of Oslo

ISBN: (纸本)9781467318808

In this paper, we derive a maximum-likelihood (ML) decoder for the demodulate-and-forward (DF) based cooperative communication system using Alamouti space-time block code (STBC) in a distributed manner. We also propose a sub-optimal low complexity piece-wise linear (PL) decoder of the distributed Alamouti code in a DF cooperative system in which one relay out of two relays is in outage. The proposed PL decoder does not lead to any significant performance degradation and performs very close to the proposed ML decoder. Moreover, the proposed ML decoder of the DF cooperative system significantly outperforms an amplify-and-forward (AF) based cooperative system when both systems use the same data rate and distributed Alamouti STBC.

关键词： DEUTERIUM FLUORIDES cooperative systems space time block coding decoders DEcoding degradation of performance COMMUNICATION SYSTEMS Computer Programming Languages Distribute

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A distributed differential space-time coding with full interference cancellation scheme for a cooperative four relay network

A distributed differential space-time coding with full inter...

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Mosharaka International Conference on Communications, Computers and Applications, MIC-CCA

作者： Gaojie Chen Ousama Alnatouh Lu Ge Jonathon Chambers Advanced Signal Processing Group School of Electronic Electrical and Systems Engineering Loughborough University Loughborough Leicestershire UK

ISBN: (纸本)9781467352307

We propose the use of a distributed differential space-time code within a two-hop cooperative wireless four relay network, with partial channel information at the destination, over quasi-static Rayleigh fading channels, which can achieve full cooperative diversity and improve the transmission rate to approximately unit. In this scheme the four relay nodes are arranged as two groups of two relay nodes, both of which employ the distributed differential space time block coding design, but with offset transmission scheduling. Therefore, the source can serially transmit data to the destination and the overall rate can be improved. However, this transmission scheme may suffer from inter-relay interference which is caused by the simultaneous transmission of the source and another group of relays. A full interference cancellation (FIC) approach is therefore used to remove the inter-relay interference. Uncoded and coded bit error rate simulations confirm the utility of the scheme.

关键词： cooperative destination transmission destination Interference cancellation time coding Relay networks information channels Trunk Node simultaneous transmission space-time codes space time block coding relay Scheme TRANSMISSION RATE

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Multi-Antenna Uplink Transmission for LTE-A

Multi-Antenna Uplink Transmission for LTE-A

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IEEE Vehicular Technology Conference

作者： Yan Meng Gang Shen Jiyong Pang Wei Wang Feng Han Dongyao Wang Research and Innovation Center Alcatel-Lucent Shanghai Bell Co. Ltd

ISBN: (纸本)9781467318808

Clustered DFT-S-OFDM has been accepted as the uplink multiple access scheme for LTE-Advanced. In this paper, a new transmit diversity with four transmit antennas is proposed for Clustered DFT-S-OFDM system. A modified Frequency Switched Transmit Diversity (FSTD) algorithm is proposed, where the multiple clusters can be divided into two groups by four antennas, thus the number of clusters on each antenna will be reduced. As a result, the PAPR performance of each antenna has been improved. Meanwhile, in order to obtain additional frequency diversity gain, the proposed scheme has introduced more channels by a symbol-based dynamic cluster allocation method, which makes one turbo coded stream transmitted multiple channels. Moreover, the space-time block coding (STBC) is employed for the two antennas in each group to achieve spatial diversity and coding gain. Simulation results show that the proposed scheme has good PAPR and Bit block Error Rate (BLER) performance on frequency selective MIMO channels.

关键词： ANTENNA Frequency diversity diversity reception antennae up link block error probability transmitting antennas space time block coding spatial diversity multiple antenna Peak to average power ratio Local thermodynamic equilibrium

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Reduced-Complexity Soft STBC Detection

Reduced-Complexity Soft STBC Detection

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IEEE Global Communications Conference

作者： Chao Xu Dandan Liang Shinya Sugiura Soon Xin Ng Lajos Hanzo School of ECS University of Southampton Toyota Central R&D Labs Inc.

ISBN: (纸本)9781467309202

In this paper, we propose to reduce the complexity of both the Approx-Log-MAP algorithm as well as of the Max-Log-MAP algorithm, which were designed for soft-decision-aided space-time block Code (STBC) detectors. First of all, we review the STBC design, which enables regular L-PSK/QAM detectors to be invoked in order to detect STBCs on a symbol-by-symbol basis. Secondly, we propose to operate the L-PSK/QAM aided STBC detection on a bit-by-bit basis, so that the complexity may be reduced from the order of O(L) to O(BPS = log_2 L). Our simulation results demonstrate that a near-capacity performance may be achieved by the proposed detectors at a substantially reduced detection complexity. For example, a factor six complexity reduction was achieved by the proposed algorithms, when they were invoked for detecting Alamouti's Square 16QAM aided G2 scheme.

关键词： space time block coding OPERATING LIMIT detector Complexity Signs and symbols Simulation results

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