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A view on full-diversity modulus-preserving rate-one linear space-time block codes

SIGNAL PROCESSING 2006年第8期86卷 1968-1975页

作者： Zhou, Shengli Ma, Xiaoli Pattipati, Krishna Univ Connecticut Dept Elect & Comp Engn Storrs CT 06269 USA Auburn Univ Dept Elect & Comp Engn Auburn AL 36849 USA

In this paper, we consider the class of linear space time block codes (STBCs) that possess the following properties: (i) enabling full antenna diversity, (ii) preserving the modulus of information symbols, and (iii) achieving the maximum rate of one symbol per channel use under (i) and (ii). We first provide an alternative construction for full-diversity rate-one STBCs that are based on linear constellation precoding (LCP). In sharp contrast to existing LCP-based designs, the proposed construction is modulus-preserving, thanks to an explicit unitary diagonal precoding on symbol blocks combined with an implicit fast-Fourier-transform (FFT) precoding via circularly shifted transmissions over multiple antennas. Our proposed construction also allows flexible choices on the precoder size, a feature not available in the original design. We then demonstrate that quasi-orthogonal (QO) STBCs can be constructed by embedding modulus-preserving LCP designs into orthogonal structures. Interestingly, QO-STBCs can be interpreted as space-time-frequency (STF) block codes, that were originally developed for multi-antenna multi-carrier systems, up to FFT transformations. (c) 2005 Elsevier B.V. All rights reserved.

关键词： space time block coding linear constellation precoding circular delay diversity quasi-orthogonal full antenna diversity modulus-preserving

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Advanced Receiver Algorithms for Multi-Layered space-time block Codes

Advanced Receiver Algorithms for Multi-Layered Space-Time Bl...

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2006 IET Seminar on Ultra Wideband Systems, Technologies and Applications

作者： A. Raza J. A. Schormans X. Chen Department of Electronic Engineering Queen''s Mary University of London London UK Queen Mary University of London London London GB

ISBN: (纸本)086341625X;9780863416255

In this paper we propose a new receiver architecture for multi-layered space-time block codes based on the QR decomposition and compare its performance to an alternative solution proposed by the authors based on MMSE. Both these algorithms use an iterative method based on soft decision statistics to cancel out interference from subsequent decoded layers and reduce the effect of error propagation (EP). We also compare the performance results with a sorted QR- method and discuss the complexity, rate and diversity tradeoffs.

关键词： Multi-layer STBC MIMO V-BLAST Diversity V-BLAST space time block coding multiple input multiple output systems multilayers algorithms Receivers spacetime Codes block codes iterative methods Mini Mental State Examination

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Capacity and error probability analysis for orthogonal space-time block codes over correlated Rayleigh and Rician fading channels

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2005年第11期E88A卷 3203-3213页

作者： Zhang, H Li, W Gulliver, TA Univ Victoria Dept Elect & Comp Engn Victoria BC V8W 3P6 Canada

In this paper, the capacity and error probability of orthogonal space-time block codes (STBCs) are presented for PAM/PSK/QAM modulation in correlated flat fading channels. We consider an equivalent scalar AWGN (additive white Gaussian noise) channel with a channel gain proportional to the Frobenius norm of the matrix channel. A unified approach to the error probability analysis for correlated Rayleigh and Rician fading channels is presented. Closed form error probability expressions are derived for Rayleigh fading channels. We also determine the capacity and probability of error for a multiuser direct sequence code division multiple access (DS-CDMA) system employing a STBC over correlated fading channels.

关键词： space time block coding correlated fading DS-CDMA

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Tap-constrained constant modulus algorithm for the blind equalisation of time-reversal-based STBCs through the exploitation of algebraic properties

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IEE PROCEEDINGS-COMMUNICATIONS 2005年第3期152卷 295-301页

作者： Luo, Y Lambotharan, S Kings Coll London Ctr DSP Res London WC2R 2LS England

A tap-constrained constant modulus algorithm is proposed for the blind equalisation of a time-reversal-based space-time block-coded (STBC) transmission. The tap constraint has been developed by exploiting certain algebraic properties of STBC, and this constraint avoids the problem of repeated retrieval of identical sources found in the conventional constant modulus algorithms. The bit-error-rate performance of the proposed blind detection algorithm is shown to be very close to that of a pilot-based Viterbi equaliser.

关键词： exploitation Algebra Blind equalization constant modulus algorithm (CMA) space time block coding Detection algorithms

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An adaptive power allocation scheme for space-time block coded MIMO systems

An adaptive power allocation scheme for space-time block cod...

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IEEE Wireless Communications and Networking Conference

作者： Xian, L Liu, HP Oregon State Univ Sch Elect Engn & Comp Sci Corvallis OR 97331 USA

ISBN: (纸本)0780389662

Receive diversity yields a higher signal-to-noise ratio (SNR) than transmit diversity when the total transmitted power and diversity order are the same. However, if the transmitter has complete or partial knowledge of channel, the SNR gap between these two schemes can be reduced. This paper introduces an adaptive power allocation scheme for space-time block coded (STBC) multiple-antenna systems to improve system performance. For any set of channel fading coefficients, the transmit power scaling factors are controlled by a single design parameter u. The proposed adaptive power allocation scheme improves the instantaneous SNR at the receiver. Special choices of U result in some existing STBC schemes. Performance gain of the proposed scheme over the conventional equal-power scheme under the condition of perfect and imperfect feedback is studied. The maximum achievable SNR gain limit over the conventional scheme is also derived.

关键词： error statistics space-time codes block codes MIMO systems power control adaptive control feedback diversity reception fading channels transmitting antennas receiving antennas adaptive power allocation space-time block code receive diversity signal-to-noise ratio transmit diversity perfect feedback imperfect feedback maximum achievable SNR gain STBC multiple-antenna systems system performance channel fading coefficients transmit power scaling factors instantaneous SNR multiple input multiple output systems diversity reception adaptive power allocation receive diversity transmitting antennas Receiving antennas space-time codes System performance block codes space time block coding Fading channels Power control adaptive control Feedback Transmitter power

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Blind Channel Estimator for MIMO-OFDM Systems Based on Linear Non-redundant Precoding

Blind Channel Estimator for MIMO-OFDM Systems Based on Linea...

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2005年无线通信、网络和移动计算国际会议

作者： Jianxin Guo Lei Jiang Yanxin Gou Xiangru Meng Telecommunication Engineering Institute Air Force Engineering University Xi'an China

ISBN: (纸本)078039335X

In this paper, a blind channel estimator, which is based on linear non-redundant precoding and second-order statistics, is proposed for space time block (STBC) coded MIMO-OFDM systems. According to the complex orthogonal properties of the STBCs, the channel estimate with a scalar ambiguity can be obtained through a series of simple linear transformation. Simulation results show that the proposed scheme can track the time-varying channel state well and thus improve the system performance when the number of the statistical data is properly chosen.

关键词： prediction coding time-varying channels System performance Statistical Data MIMO nonlinear systems multiple input multiple output systems space time block coding linear transformations

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STBC MC-CDMA systems:: comparison of MMSE single-user and multiple-user detection schemes over Rayleigh and MIMO METRA channels

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EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS 2004年第3期15卷 275-281页

作者： Auffray, JM Baudais, JY Hélard, JF Inst Natl Sci Appl Dept ESC Inst Elect & Telecommun IETRUMR 616420CNRS F-35043 Rennes France

The performance of MMSE single-user detection (SD) and multi-user detection (MD) STBC multi-carrier code division multiple access (MC-CDMA) systems are analysed and compared in the case of two transmit antennas and one or two receive antennas over Rayleigh fading channels and then over the stochastic multiple input multiple output (MIMO) METRA channel model. With two transmit and one receive antennas, MD achieves a gain of roughly I dB for non-full load systems while the same performance is obtained with MD and SD for full load systems. Besides, with two receive antennas, we present a suboptimal and an optimal MMSE SD MIMO MC-CDMA schemes, this last one offering a very good performance. Finally, the very good behaviour of MMSE space-time block coding (STBC) MC-CDMA systems is confirmed over the realistic multi element transmit receive antennas (METRA) MIMO channel. Copyright (C) 2004 AEI.

关键词： Two Receiving antennas ANTENNA multiple input multiple output systems Mini Mental State Examination transmitting antennas space time block coding single user Multicarrier code division multiple access Raleigh fading channels systems comparison Loading systems Rayleigh CDMA mobile communications

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A/D clipping effects on STBC scheme in receivers employing direct conversion structure

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ELECTRONICS LETTERS 2004年第5期40卷 352-354页

作者： Gor, L Faulkner, M Singh, J Victoria Univ Sch Elect Engn Melbourne Vic 8001 Australia Victoria Univ Ctr Telecommun & Microelect Melbourne Vic Australia

The performance of the Alamouti space time block coding (STBC) technique and single-input single-output (SISO) system is compared in the presence of A/D clipping. Square clipping, imposed by a direct conversion receiver structure was considered. With the target symbol error rate of 10(-3) it was shown that STB coded signals have higher clip floor, and sensitivity to noise, when compared to the SISO system.

关键词： AD single input single output systems space time block coding direct conversion Receivers

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Adaptive SR-ARQ combined with STBC in Markov channels

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ELECTRONICS LETTERS 2004年第6期40卷 377-378页

作者： Femenias, G Univ Illes Balears Dept Matemat & Informat Balears 07122 Spain

The throughput and packet error rate for a selective-repeat ARQ scheme based on a constant-power variable-rate adaptive M-QAM system combined with orthogonal STBC in Nakagami Markovian channels is analysed. The impact... 详细信息

关键词： dwell time Automatic repeat request space time block coding Markov Throughput Self tuning

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space-time block codes: trained, blind, and semi-blind detection

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DIGITAL SIGNAL PROCESSING 2003年第1期13卷 93-105页

作者： Stoica, P Ganesan, G Uppsala Univ Dept Syst & Control SE-75103 Uppsala Sweden

space-time block coding (STBC) is a recent breakthrough solution to the a combined semi-blind scheme whose performance affecting the channel is fairly slow. To capitalize on the advantages of and performance. To alleviate the data rate reduction we introduce a at the transmit site. An additional appealing property of STBC is that available to either site. The performance loss corresponding to the blind detection scheme that is a natural extension of the ML detector blind scheme, however, turns out to be significant unless the fading briefly a trained detection scheme that uses a block of pilot symbols to channels. communication system without requiring knowledge of the channel matrix decoupled form. However, STBC requires knowledge of the channel gain estimate the channel. Such a scheme incurs a reduction in both data rate for STBC to the case where channel state information (CSI) is not is shown to be considerably better than that of the trained-detection matrix at the receive site. In this paper, we present and contrast three problem of fully exploiting the spatial diversity of a multi-antenna scheme (using exact CSI at the receiver), for reasonably slow fading scheme and in fact quite close to the performance of the clairvoyant schemes that avoid the previous requirement of STBC. First, we discuss the associated maximum-likelihood (ML) detector has a very simple the two aforementioned schemes and smooth out their drawbacks we propose. (C) 2002 Elsevier Science (USA). All rights reserved.

关键词： block codes Scheme channel matrix space time block coding spatial diversity rate reduction

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