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Full-rate and low-complexity space-time block coding concatenated with channel codes

INTERNATIONAL JOURNAL OF INFORMATION TECHNOLOGY & DECISION MAKING 2007年第1期6卷 5-14页

作者： Yu, Xiangbin Bi, Guangguo Nanjing Univ Aeronaut & Astronaut Coll Informat Sci & Technol Nanjing 210016 Peoples R China Southeast Univ Natl Mobile Commun Res LAb Nanjing 210096 Peoples R China

space-time block (STB) coding has been an effective transmit diversity technique for combating fading recently. In this paper, a full-rate and low-complexity STB coding scheme with complex orthogonal design for multiple antennas is proposed, and turbo code is employed as channel coding to improve the proposed code scheme performance further. Compared with full-diversity multiple antennas STB coding schemes, the proposed scheme can implement full data rate, partial diversity and a smaller complexity, and has more spatial redundancy information. Moreover, using the proposed scheme can form efficient spatial interleaving, thus performance loss due to partial diversity is effectively compensated by the concatenation of turbo coding. Simulation results show that on the condition of the same system throughput and concatenation of turbo code, the proposed scheme has lower bit error rate (BER) than those low-rate and full-diversity multiple antennas STB coding schemes.

关键词： space-time block coding full rate low complexity turbo code transmit diversity multiple antennas

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Performance of multiuser CDMA system with space-time block coding in MIMO Rayleigh fading channels

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Science in China(Series F) 2009年第12期52卷 2296-2307页

作者： YU XiangBin DONG Tao BI GuangGuo College of Information Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China School of Information Science and Technology Sun Yat-sen University Guangzhou 510275 China National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China

In this paper, by introducing orthogonal space-time coding scheme, the multiuser CDMA systems with different space time codes are given, and corresponding system performance is investigated over Rayleigh fading channel. A low-complexity multiuser receiver scheme is developed for space-time coded CDMA systems. The scheme can make full use of the complex orthogonality of space-time coding to simplify the high decoding complexity of the existing scheme. Compared to the existing scheme with exponential decoding complexity, it has linear decoding complexity. Based on the performance analysis and mathematical calculation, average bit error rate （BER） of the system is derived in detail, and tight closed-form approximation expressions of BER are attained. Simulation results on average BER are in agreement with the theory analysis. The results show that the proposed scheme can achieve almost the same performance as the existing scheme. Moreover, on the condition of same system throughput and concatenation of channel code, the given full-rate space-time coded CDMA system has lower BER than the full-diversity space-time coded CDMA systems.

关键词： space-time block coding code division multiple access (CDMA) full diversity full rate multiple input multiple output (MIMO)

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Fast Convergent LMS Adaptive Receiver for MC-CDMA Systems with space-time block coding

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IEEE COMMUNICATIONS LETTERS 2010年第8期14卷 737-739页

作者： Seo, Bangwon Ahn, Woo-Geun Jeong, Cheol Kim, Hyung-Myung Elect & Telecommun Res Inst Taejon 305606 South Korea Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea

For multicarrier code-division multiple access (MC-CDMA) systems employing Alamouti's simple space-time block coding (STBC), a special relationship between two minimum mean-square error (MMSE) filter weight vectors is derived in which one filter is for detecting odd-indexed symbols and the other for even-indexed symbols. Using this relationship, a modified MSE cost function is presented and an improved least mean-square (LMS) adaptive receiver is proposed. Since the number of filter taps independently updated in the proposed adaptive receiver is only half that of the conventional LMS adaptive receiver, the proposed adaptive receiver has a faster convergence rate than the conventional LMS adaptive receiver while keeping the same steady-state MSE performance. This is verified through the simulation.

关键词： MC-CDMA space-time block coding MMSE receiver LMS adaptive receiver

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Error Control Coded space-time block coding for Frequency-Selective Fading Channels

Error Control Coded Space-Time Block Coding for Frequency-Se...

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1st International Workshop on Education Technology and Computer Science

作者： Zhang, Jieyin Zhang, Minxia Univ Leeds Dept Elect & Elect Engn Leeds LS2 9JT W Yorkshire England Qingdao Technol Univ Dept Comp Sci Qingdao Peoples R China

ISBN: (纸本)9780769535579

To achieve high data rate and spectral efficiency requirement, diversity techniques are designed to compensate fading channel impairments. Transmitter diversity scheme are preferred as they effectively increase data rates for all the receivers in their coverage area. Since transmitter diversity techniques such as beamformers at the transmitter require feedback from the receiver, space-time block coding (STBC) is considered to be a powerful transmitter diversity technique as this scheme does not require any feedback from the receiver. The STBC scheme introduced by Alamouti([1]) is suitable only for flat fading channels. Therefore a transmitter diversity scheme called time-Reversal space-time block coding (TR-STBC) for frequency-selective fading channels is studied. Finally, error coding techniques are applied to the system which enhances the Bit Error Rate (BER) performance of TR-STBC scheme.

关键词： space-time block coding STBC TR-STBC

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Performance analysis of space-time block coding techniques in the presence of imperfect channel estimation

Performance analysis of space-time block coding techniques i...

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Conference on Enabling Technologies for 3G and Beyond

作者： Corazza, GE Bellini, D Salmi, P Vanelli-Coralli, A Univ Bologna DEIS I-40136 Bologna Italy

ISBN: (纸本)0819442534

The optimization of spectrum efficiency will be a major concern for fourth generation wireless systems. In our view, the key principle that holds the promise for ultimate spectrum exploitation is tile full-fledged use of diversity techniques. In particular, there is a definite trend towards the adoption of diversity in multiple domains. This trend is justified by the fact that the particular domain whereby diversity is implemented determines the benefit that should be expected in terms of impairments to be counteracted. In this paper we will focus our attention onto space-time coding (STC) techniques, where the domains of antenna diversity and time diversity are joined to yield unprecedented performance gains without increasing bandwidth requirements. The gains can be traded-off for an increase in data rate, fixing power/interference requirements. Here, we analytically evaluate system performance in the presence of both ideal and realistic propagation conditions: Rice-lognormal and Rayleigh fading channels are considered with ideal and non-ideal channel state recovery. In this framework, a closed-form expression for the average bit error probability for space-time block coding systems has been achieved. In particular, when imperfect channel phase estimation is taken into account, bit error probability has been expressed as a function of the phase error statistical distribution. As a numerical example, the case of Gaussian phase error model has been considered and the results have been validated through Monte-Carlo simulations.

关键词： space-time block coding diversity techniques Rayleigh channel channel estimation fourth generation

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MMSE detection for space-time block coding over time-selective fading channels

MMSE detection for space-time block coding over time-selecti...

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Canadian Conference on Electrical and Computer Engineering

作者： Yu, Donghun Seoul Natl Univ Seoul South Korea

ISBN: (纸本)9781424416424

A detector for space-time block coding is proposed to combat time-selective fading. To suppress both noise and interference, a minimum mean square error (MMSE) based detector is introduced for space-time block coding. It is shown that the proposed detector outperforms the conventional detectors when the channel is time-selective fading.

关键词： detectors time-selective fading channels least mean square methods MIMO systems space-time block coding

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Adaptive receive antenna selection for space-time block coding under channel estimation errors

Adaptive receive antenna selection for space-time block codi...

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15th IEEE International Symposium on Personal, Indoor, Mobile, Radio Communications (PIMRC 2004)

作者： Zhang, K Niu, ZS Tsinghua Univ Dept Elect Engn Beijing 100084 Peoples R China

ISBN: (纸本)0780385233

space-time block coding (STBC) can achieve full diversity gain of MIMO systems with low decoding complexity. The receiver needs channel state information to detect the transmitted signals. Under fast-fading channel, Channel estimation errors are inevitable and greatly degrade the performance of space-time block coding. In this paper, we propose an adaptive receive antenna selection scheme, which adjusts the number of receive antennas according to the channel state. Then we give an analytical result on performance of the STBC with A(t) transmit antennas and A(T) receive antennas with or without the proposed scheme. From the performance evaluation and numerical example, the proposed scheme have better performance than the scheme using all the receive antennas under channel estimation errors.

关键词： space-time block coding channel estimation error receive antenna selection

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A novel scheme for space-time block coding with variable transmit diversity gain in OFDM systems

A novel scheme for space-time block coding with variable tra...

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6th IEEE Circuits and Systems Symposium on Emerging Technologies

作者： Ren, GL Zhang, H Chang, YL Xidian Univ State Key Lab ISN Xian 710071 Peoples R China

ISBN: (纸本)0780379381

A novel scheme for space-time block coding with a variable transmit diversity gain is proposed for OFDM systems. The OFDM symbols are divided into two groups of orthogonal sub-symbols with each group coded in Alamouli STBC in the coding, and the new scheme for STBC is constructed by differently combining the coded data of each group with the different transmit diversity gain able to be achieved by linearly processing and correspondingly combining the received data on the sub-carriers. The results of computer simulation show that the average SNR for the proposed scheme has been improved 6dB for the double diversity scheme and 10dB for the quadruple diversity scheme compared with the OFDM system without diversity when BER is 10(-2).

关键词： space-time block coding OFDM variable transmit diversity gain

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Symbol Error Rate Analysis of Multi-IRS-Aided Distributed space-time block coding in MISO Wireless Communication Systems 25

Symbol Error Rate Analysis of Multi-IRS-Aided Distributed Sp...

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IEEE Wireless Communications and Networking Conference (IEEE WCNC)

作者： Wang, Xudong Feng, Lei Zhou, Fanqin Li, Wenjing Beijing Univ Posts & Telecommun State Key Lab Networking & Switching Technol Beijing 100876 Peoples R China

ISBN: (纸本)9798350303582;9798350303599

The intelligent reflecting surface (IRS) serves to manipulate information and modulate signals, facilitating space-time coding in wireless communication. This study presents an innovative model for implementing space-time block coding (STBC), where the base station transmits multiple symbols to a user using multiple IRSs. These IRSs manipulate phase shifts to establish robust links. Initially, statistical characterizations are derived for the sum of independent generalized gamma (GG) random variables, providing expressions for the end-to-end signal-to-noise ratio (SNR). Subsequently, a closed-form expression for symbol error rate (SER) is developed to evaluate reliability performance. Additionally, an asymptotic expression for SER at high transmission power is supplied to outline performance limits. Simulation results reveal that the STBC system assisted by multiple IRSs attains comparable or superior performance when contrasted with the STBC system that employs multiple amplify-and-forward (AF) relays, utilizing a restricted number of reflecting units.

关键词： Intelligent reflecting surface space-time block coding phase shift relay

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Channel estimation for wireless communications using space-time block coding techniques

Channel estimation for wireless communications using space-t...

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IEEE International Symposium on Circuits and Systems

作者： Yang, J Sun, Y Senior, JM Pem, N Xidian Univ Xian Peoples R China

ISBN: (纸本)0780377613

This paper presents a. method of estimating channel parameters in wireless communications using space-time block coding (STBC). After reviewing the concept of STBC, the system model of radio communication with STBC is described and the estimation method is derived. System performances have been simulated using MATLAB. The results of the simulations show that the proposed algorithm of channel estimation is practicable and effective as there is only little discrepancy between the performances using the estimated and known channel parameters.

关键词： transmit diversity space-time block coding channel estimation wireless communications

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