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Performance of Systematic RRNS Based space-time block codes with Probability-Aware Adaptive Demapping

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2013年第5期12卷 2458-2469页

作者： Sengupta, Avik Natarajan, Balasubramaniam Virginia Tech Hume Ctr Natl Secur & Technol Dept Elect & Comp Engn Blacksburg VA 24060 USA Kansas State Univ Dept Elect & Comp Engn Wireless Commun Grp WiCom Manhattan KS 66502 USA

In this paper, we propose a novel design of concatenated space-time block codes (STBCs) using Systematic Redundant Residue Number System (RRNS) codes. The link between residues and complex signal constellations is optimized by incorporating the "Direct Mapping", "Prior probability based Distance Aware Mapping" and "Indirect Mapping" schemes. We analytically quantify the upper bounds on the codeword and bit error probabilities of Systematic RRNS-STBC and characterize the achievable coding and diversity gains assuming maximum likelihood decoding (MLD). We propose an Adaptive M-ary Demapping scheme for ML decoding, which exploits the RRNS code structure to decrease complexity and provide further performance improvement over the Distance Aware Mapping scheme. It is shown that Indirect Mapping, when used for RRNS coding schemes can offer more efficient transmission and performance than naive M-ary mapping. It is also seen that Systematic RRNS-STBC codes provide superior performance compared to Non-systematic RRNS-STBC, for the same code parameters, owing to more efficient binary to residue mapping.

关键词： Redundant residue number system MIMO space-time block code probability-aware adaptive demapping

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Proof on the maximal rates of space-time block codes from complex orthogonal design

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IET COMMUNICATIONS 2013年第10期7卷 960-965页

作者： Chen, Jun-Sheng Wang, Jian-Xin Nanjing Univ Sci & Technol Sch Elect & Opt Engn Nanjing Jiangsu Peoples R China Yangzhou Univ Coll Informat Engn Yangzhou Peoples R China

In this study, the authors present a novel proof on the maximal rates of space-time block codes from complex orthogonal design (COD). The method of the proof is derived from an observation about the CODs, which reveals some inherent laws of their structure. The proof is applicable to any CODs, rather than to some specific designs, and does not need any auxiliary matrix or matrix transformation. The conclusion in this study also indicates that the upper bound of the CODs' rate conjectured by the authors is tight and achievable.

关键词： orthogonal codes space-time block codes maximal rate space-time block code complex orthogonal design COD

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Efficient Decoding for Generalized Quasi-Orthogonal space-time block codes

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WIRELESS PERSONAL COMMUNICATIONS 2013年第4期68卷 1731-1743页

作者： Taha, Zafar Q. Farraj, Abdallah K. Imam Univ Dept Elect Engn Riyadh Saudi Arabia Texas A&M Univ Dept Elect & Comp Engn College Stn TX 77843 USA

space-time coding can achieve transmit diversity and power gain over spatially uncoded systems without sacrificing bandwidth. There are various approaches in coding structures, including space-time block codes. A class of space-time block codes namely quasi-orthogonal space-time block codes can achieve the full rate, but the conventional decoders of these codes experience interference terms resulting from neighboring signals during signal detection. The presence of the interference terms causes an increase in the decoder complexity and a decrease in the performance gain. In this article, we propose a modification to the conventional coding/decoding scheme that will improve performance, reduce decoding complexity, and improve robustness against channel estimation errors as well.

关键词： space-time block code QOSTBC Decoder complexity Transmit diversity Zero-forcing decoding

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Performance Analysis of Nakagami-m MIMO Channel in the Presence of Multiple Keyhole

Performance Analysis of Nakagami-<i>m</i> MIMO Channel in th...

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International Conference on Information Networking (ICOIN)

作者： Islam, Md Muzahidul Hague, Md Razibul Islam, Md Rezaul Mostafa, Md Golam MIST Dept EECE Dhaka Bangladesh

ISBN: (纸本)9781479936892

In this contribution, we analyze the average symbol error rate (SER) of space-time block coded (STBC) multiple-input multiple-output (MIMO) system over Nakagami-m fading channel with M-PSK constellation in the presence of multiple keyholes. We derived the expression of channel transmission matrix which was further statistically analyzed to find the probability density function (PDF) of instantaneous signal to noise ratio (SNR) for the channel containing multiple keyholes between it's source and destination end. By performing (p-1)-fold convolution of the individual PDFs of instantaneous SNRs we derived the overall PDF of the multiple keyhole channel, which was used to derive the expression for average SER of the system. Furthermore, we examined the effect of multiple keyholes on the system performance. Result shows that with the increase of number of keyholes, a significant improvement in the system performance takes place. For a given number of keyholes, by increasing the number of receive antennas further improvement in the system performance is observed.

关键词： Keyhole effect Multiple-input multiple-output Nakagami-m distribution space-time block code Symbol error rate

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Blind Relay Network with Viterbi Detection 33

Blind Relay Network with Viterbi Detection

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33rd Annual IEEE Military Communications Conference on Affordable Mission Success - Meeting the Challenge (MILCOM)

作者： Feng, Shuang Yang, Jie Kwon, Hyuck M. Wichita State Univ Dept Elect Engn & Comp Sci Wichita KS 67260 USA

ISBN: (纸本)9781479967704

This paper compares the performance of a blind relay communication system with that of a non-blind relay communication system. For a blind system, a differential space-time block code (DSTBC) or a blind Viterbi detection is used, and for a non-blind system, a space-time block code (STBC) is used. Also, this paper takes another blind detection mechanism, the Zhang's code, and compares its performance with that of the blind Viterbi detection under a Jakes' fading environment. It was found that the case of a relay closer to the source shows better performance than the case of a relay closer to the destination. It was also observed that the blind Viterbi decoder shows better performance than the Zhang's code under the Jakes' fading environment.

关键词： relay Viterbi space-time block code blind

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Evaluating Cooperative Diversity-Based WBAN by Using STBC with Pre-Coding and Relay Selection

Evaluating Cooperative Diversity-Based WBAN by Using STBC wi...

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4th Joint International Conference on Information and Communication Technology, Electronic and Electrical Engineering (JICTEE)

作者： Jamjareegulgarn, Punyawi King Mongkuts Inst Technol Ladkrabang Dept Elect Engn Fac Engn Pathui 86160 Chumphon Thailand

ISBN: (纸本)9781479938551

The main objective of this paper is to evaluate the network performance of a cooperative diversity-based wireless body area network (WBAN) by using (2,2) Alamouti's space-time block code (STBC) with pre-coding scheme (STBC-PC) and a relay selection procedure (RSP). The considered WBAN model is served for healthcare service in order to mitigate the undesired effects of WBAN due to high path loss and fading as well as to keep a low transmit power while meeting to the desired WBAN quality of services. In this paper, the pre-coding scheme is taken to be employed in conjunction with the STBC, since a single antenna of each wireless sensor node in healthcare service can be exploited possibly as well as the high gain can still be achieved without loss of transmission rate. A channel model CM3 B is considered for computing the actual path loss of each WBAN link and the network performance is evaluated in terms of bit error rate (BER). The simulation results confirm that at each BER value, SNRs of STBC-PC without direct link (line-of-sight or LOS) scheme are the lowest which is compared with direct link, receive diversity and MRC, and (2,2) Alamouti's STBC. BER values of DQPSK-based STBC-PC are higher than those of DBPSK-based STBC-PC. Moreover, although any WBAN sensor nodes are chosen as a relay or any type of modulations are employed in STBC-PC with LOS, all of BER values have surprisingly the same trend.

关键词： amplify-and-forward CM3 B cooperative diversity-based WBAN pre-coding space-time block code

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Optimal 2 x 2 space-time block codes Based On Mutual Information in Rayleigh fading

Optimal 2 x 2 Space-Time Block Codes Based On Mutual Informa...

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26th IEEE Annual Canadian Conference on Electrical and Computer Engineering (CCECE)

作者： Syed, Tamseel Mahmood Tran, Nghi H. Univ Akron Dept Elect & Comp Engn Akron OH 44325 USA

ISBN: (纸本)9781479900336;9781479900312

This paper investigates the design of a 2 x 2 optimal space-time block code (SBTC) for a multi-input multi-output (MIMO) system using the mutual information between the finite-alphabet input and the channel output as a main design criterion over Rayleigh fading channels. Different from the STBC design methods using PEP analysis usually seen in the literature that are valid only at high SNRs, our design method can apply to any SNR region, which is of more interest from both information-theoretic and practical points of view. To accomplish this, we first develop in closed-form an expression of the mutual information. This simple criterion is helpful in finding an optimal STBC and it can be applied to any discrete constellation such as quadrature amplitude modulation (QAM) or phase shift keying (PSK). Numerical results indicate that our proposed STBCs provide a better mutual information performance than the previously well-known STBCs, including the Damen code and Golden code.

关键词： Multiple-Input Multiple-Output (MIMO) space-time block code Mutual Information Rayleigh Fading

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Optimal 2 × 2 space-time block codes Based On Mutual Information in Rayleigh fading

Optimal 2 × 2 Space-Time Block Codes Based On Mutual Inform...

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IEEE Canadian Conference on Electrical and Computer Engineering

作者： Tamseel Mahmood Syed Nghi H. Tran Department of Electrical & Computer Engineering University of Akron

ISBN: (纸本)9781479900312

This paper investigates the design of a 2 × 2 optimal space-time block code (SBTC) for a multi-input multi-output (MIMO) system using the mutual information between the finite-alphabet input and the channel output as a main design criterion over Rayleigh fading channels. Different from the STBC design methods using PEP analysis usually seen in the literature that are valid only at high SNRs, our design method can apply to any SNR region, which is of more interest from both information-theoretic and practical points of view. To accomplish this, we first develop in closed-form an expression of the mutual information. This simple criterion is helpful in finding an optimal STBC and it can be applied to any discrete constellation such as quadrature amplitude modulation (QAM) or phase shift keying (PSK). Numerical results indicate that our proposed STBCs provide a better mutual information performance than the previously well-known STBCs, including the Damen code and Golden code.

关键词： Multiple-Input Multiple-Output (MIMO) space-time block code Mutual Information Rayleigh Fading

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Robust Transmit Antenna Selection with Phase Feedback Over Correlated Fading Channels

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WIRELESS PERSONAL COMMUNICATIONS 2013年第4期71卷 2937-2945页

作者： Van-Bien Pham Le Quy Don Tech Univ Fac Radioelect Hanoi Vietnam

A new transmit antenna selection (TAS) scheme with phase feedback for multiple-input multiple-output systems is proposed in this paper. This scheme allows two or more transmit antennas to simultaneously use one radio frequency chain. By grouping the transmit antennas according to their similarities in instantaneous channel coefficients into two subsets and treating each subset as a single antenna, both hardware complexity reduction and antenna array gain can be achieved. Compared with the transmit antenna selection combined with space-time block code (TAS/STBC) scheme, the proposed TAS scheme provides excellent robustness, in terms of symbol error rate performance, against spatially correlated fading channels. Moreover, the proposed TAS scheme need not use STBC encoder and decoder which used in the TAS/STBC schemes. Therefore, the proposed TAS scheme is simpler than the TAS/STBC schemes in practical hardware implementation.

关键词： Transmit antenna selection Phase feedback space-time block code

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Structured Dispersion Matrices From Division Algebra codes for space-time Shift Keying

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IEEE SIGNAL PROCESSING LETTERS 2013年第4期20卷 371-374页

作者： Rajashekar, Rakshith Hari, K. V. S. Hanzo, L. Indian Inst Sci Dept Elect Commun Engn Bangalore 560012 Karnataka India Univ Southampton Sch ECS Southampton Hants England

We propose a novel method of constructing Dispersion Matrices (DM) for Coherent space-time Shift Keying (CSTSK) relying on arbitrary PSK signal sets by exploiting codes from division algebras. We show that classic codes from Cyclic Division Algebras (CDA) may be interpreted as DMs conceived for PSK signal sets. Hence various benefits of CDA codes such as their ability to achieve full diversity are inherited by CSTSK. We demonstrate that the proposed CDA based DMs are capable of achieving a lower symbol error ratio than the existing DMs generated using the capacity as their optimization objective function for both perfect and imperfect channel estimation.

关键词： Coding gain diversity space-time block code space-time shift keying STBCs from division algebras

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