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Coverage and reliability analysis of multi-IRS-aided distributed space-time block coding in MISO wireless communication systems

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PHYSICAL COMMUNICATION 2024年 63卷

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

Intelligent reflecting surface (IRS) can realize information manipulation and signal modulations to perform space-time coding wireless communication. This article introduces a novel model to perform space-time block coding (STBC), where the base station transmits multiple symbols to a destination through multiple IRS that are utilized to adjust the phase shift and establish strong links. To maximize the end-to-end SNR, we propose a graph theory based method to obtain the optimal transmit antenna selection (TAS) scheme. Based the optimal TAS scheme, we derive the statistical characterizations of the sum of independent generalized gamma random variables to obtain end-to-end signal-to-noise ratio expressions. Then, the closed-form expressions of outage probability (OP) and symbol error rate (SER) are formulated respectively to evaluate the coverage and reliability performance in wireless communication systems. Furthermore, the asymptotic expressions for OP and SER at a high transmission power are given, then the diversity order is discussed to observe the performance limit. To verify this theoretical performance analysis, extensive computer simulations are conducted to prove its effectiveness. The simulation results show that the multi-IRS-aided STBC system can attain the same or even better performance as the STBC system based on multiple amplify-and-forward relays using a little number of reflecting elements. More interestingly, the OP and SER of this system decrease more than that of the relays-aided system as transmission power increases.

关键词： Intelligent reflecting surface space-time block coding Outage probability Symbol error rate Phase shift Relay

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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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space-time block coding-Based Beamforming for Beam Squint Compensation

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IEEE WIRELESS COMMUNICATIONS LETTERS 2019年第1期8卷 241-244页

作者： Liu, Ximei Qiao, Deli East China Normal Univ Sch Informat Sci & Technol Shanghai 200241 Peoples R China East China Normal Univ Shanghai Key Lab Multidimens Informat Proc Shanghai 200241 Peoples R China

In this letter, the beam squint problem, which causes significant variations in radiated beam gain over frequencies in a millimeter wave communication system, is investigated. A constant modulus beamformer design, which is formulated to maximize the expected average beam gain within the bandwidth with limited variation over frequencies within the bandwidth, is proposed. A semidefinite relaxation method is developed to solve the optimization problem under the constant modulus constraints. Depending on the eigenvalues of the optimal solution, either direct beamforming or transmit diversity-based beamforming is employed for data transmissions. Through numerical results, the proposed transmission scheme can compensate for beam squint effectively and improve system throughput. Overall, a transmission scheme for beam squint compensation in wide-band wireless communication systems is provided.

关键词： Millimeter wave beamforming space-time block coding beam squint throughput

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Performance improvement of space diversity technique using space time block coding for time varying channels in wireless environment

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INTERNATIONAL JOURNAL OF INTELLIGENT UNMANNED SYSTEMS 2022年第2-3期10卷 278-286页

作者： Bagde, Vandana Dethe, C. G. Priyadarshini Inst Engn & Technol Dept E&C Nagpur Maharashtra India RTM Nagpur Univ UGC HRDC Nagpur Maharashtra India

Purpose A recent innovative technology used in wireless communication is recognized as multiple input multiple output (MIMO) communication system and became popular for quicker data transmission speed. This technology is being examined and implemented for the latest broadband wireless connectivity networks. Though high-capacity wireless channel is identified, there is still requirement of better techniques to get increased data transmission speed with acceptable reliability. There are two types of systems comprising of multi-antennas placed at transmitting and receiving sides, of which first is diversity technique and another is spatial multiplexing method. By making use of these diversity techniques, the reliability of transmitting signal can be improved. The fundamental method of the diversity is to transform wireless channel such as Rayleigh fading into steady additive white Gaussian noise (AWGN) channel which is devoid of any disastrous fading of the signal. The maximum transmission speed that can be achieved by spatial multiplexing methods is nearly equal to channel capacity of MIMO. Conversely, for diversity methods, the maximum speed of broadcasting is much lower than channel capacity of MIMO. With the advent of space-time block coding (STBC) antenna diversity technique, higher-speed data transmission is achievable for spatially multiplexed multiple input multiple output (SM-MIMO) system. At the receiving end, detection of the signal is a complex task for system which exhibits SM-MIMO. Additionally, a link modification method is implemented to decide appropriate coding and modulation scheme such as space diversity technique STBC to use two-way radio resources efficiently. The proposed work attempts to improve detection of signal at receiving end by employing STBC diversity technique for linear detection methods such as zero forcing (ZF), minimum mean square error (MMSE), ordered successive interference cancellation (OSIC) and maximum likelihood detection (MLD

关键词： Diversity space-time block coding Spatially multiplexed MIMO Maximum likelihood detection

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Construction of Polar Codes Concatenated to space-time block coding in MIMO System 84

Construction of Polar Codes Concatenated to Space-Time Block...

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84th IEEE Vehicular Technology Conference (VTC-Fall)

作者： Feng, Bowen Jiao, Jian Wang, Sha Wu, Shaohua Zhang, Qinyu Harbin Inst Technol Commun Engn Res Ctr Shenzhen Grad Sch Harbin Guangdong Peoples R China

ISBN: (纸本)9781509017010

To enhance the performance in practical communications, a novel construction of polar code is designed for a rational polar and space-time block coding (Polar-STBC) system. The Polar-STBC system can be equivalent to a single transmission channel for each polar code bit in Rayleigh fading MIMO channels, and the equivalent channel can be regarded as a fading channel, of which the gain coefficient and additive noise are studied. Moreover, the distribution of the additive noise is also derived. Finally, we show that the bit error rate performance of our Polar-STBC system in 2 x 2, 4 x 2 and 4 x 4 MIMOs.

关键词： Polar code space-time block coding fading channel construction algorithm

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Linear Precoding for Layered space-time block coding With Correlation Feedback 10

Linear Precoding for Layered Space-Time Block Coding With Co...

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10th International Conference on Information, Communications and Signal Processing (ICICS)

作者： Zhao, Lan Nanjing Inst Technol Sch Automat Nanjing 211167 Jiangsu Peoples R China

ISBN: (纸本)9781467372183

We propose a linear precoder for the layered space-time block coding system [2] over spatially correlated channels with channel covariance matrix feedback at the transmitter. The precoder is a combination of the well known waterfilling solution and the precoder for spatial multiplexing system that minimizes the probability of decoding error. At the receiver, decoding schemes of group zero-forcing and group minimum mean squared error with successive interference cancellation are utilized to decode the transmitted signals. Simulation results demonstrate the superiority of the combined linear precoder over the pure waterfilling solution or the spatial multiplexing precoder in correlated channel. This conclusion confirms the intuition that the optimal linear precoding should be robust to both the space-time block coding and spatial multiplexing systems.

关键词： space-time block coding V-BLAST precoding correlated channels

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Channel capacity and space-time block coding for coherent optical MIMO multi-mode fiber links

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OPTIK 2013年第10期124卷 922-927页

作者： Han, Jiawei Zhang, Jie Zhao, Yongli Gu, Wanyi Beijing Univ Posts & Telecommun State Key Lab Informat Photon & Opt Commun Beijing 100876 Peoples R China

The capacity enhancement for random coherent optical multiple-input multiple-output (MIMO) channels in multi-mode fiber (MMF) links is investigated theoretically. Additionally, the performance of space-time block coding (STBC) techniques for achieving high reliability optical MIMO transmission is numerically examined. A comparative study is performed by considering several schemes that employ multiple transmitters/receivers. Simulation results of these schemes, in terms of bit error rate (BER) as a function of optical signal to noise ratio (OSNR), are provided. (C) 2012 Elsevier GmbH. All rights reserved.

关键词： Coherent optical MIMO Multi-mode fiber links Channel capacity space-time block coding

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Power allocation for multi-antenna systems with space-time block coding in the presence of estimation error and delayed feedback

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AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 2013年第3期67卷 182-188页

作者： Yu, Xiangbin Yang, Ying Kuang, Quan Tan, Wenting Chen, Xiaomin Nanjing Univ Aeronaut & Astronaut Dept Elect Engn Nanjing Jiangsu Peoples R China City Univ Hong Kong Dept Elect Engn Kowloon Hong Kong Peoples R China Southeast Univ Natl Mobile Commun Res Lab Nanjing Jiangsu Peoples R China

Based on imperfect channel state information with channel estimation error at the receiver and delayed feedback at the transmitter, a suboptimal power allocation (PA) scheme to minimize bit error rate (BER) under a power constraint is developed for beamforming multi-antenna systems with space-time block coding. The proposed scheme is based on a so-called compressed signal-to-noise ratio criterion, where a single compressed factor is utilized, and it can be used to generalize some existing schemes by setting the compressed factor to different forms. A closed-form compressed factor is derived to minimize the BER, and the resultant close-form expression of power allocation is attained. This closed-form expression is computational efficient and can obtain the BER performance close to the existing optimal approach which requires numerical search. Simulation results show that the proposed scheme can provide BER lower than the equal power allocation scheme. However, due to the impact of both estimation error and delayed feedback, it has performance degradation when compared to the PA scheme with estimation error or delayed feedback only. (C) 2012 Elsevier GmbH. All rights reserved.

关键词： Power allocation MIMO space-time block coding Estimation error Delayed feedback

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Low-Complexity Detectors for space-time block Coded Differential Spatial Modulation

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2024年第8期73卷 12231-12236页

作者： Yang, Yukun Hai, Han Jiang, Xue-Qin Wu, Yun Mumtaz, Shahid Donghua Univ Coll Informat Sci & Technol Shanghai 201620 Peoples R China Silesian Tech Univ Dept Appl Informat PL-44100 Gliwice Poland Nottingham Trent Univ Dept Comp Sci Nottingham NG1 4FQ England

space-time block coded differential spatial modulation (STBC-DSM) is a recently proposed DSM-based multiple-input-multiple-output (MIMO) transmission technique with high diversity gain. The existing low-complexity detectors for STBC-DSM can be further designed to reduce complexity. In this paper, we propose an ordered antenna index vector detector (OVD) for STBC-DSM, and an OV-low repetition detector (OV-LRD) for further simplification. The OVD detects the symbols in a designed order, and the OV-LRD fully uses the STBC structure to simplify the OVD. Simulation results show that the OVD achieves near-optimal performance, and the OV-LRD significantly reduces complexity with negligible performance loss.

关键词： Vectors Detectors Artificial intelligence Symbols Transmitting antennas Complexity theory Slot antennas space-time block coding differential spatial modulation ordered block minimum mean squared error tree search

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Diversity Combining Scheme for time-Varying STBC NGSO Multi-Satellite Systems

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IEEE COMMUNICATIONS LETTERS 2024年第4期28卷 882-886页

作者： Singh, Vibhum Eappen, Geoffrey Martins, Wallace A. Palisetty, Rakesh Rojas, Carlos Luis Marcos Gonzalez-Rios, Jorge Luis Vasquez-Peralvo, Juan A. Krivochiza, Jevgenij Merlano-Duncan, Juan Carlos Socarras, Luis Garces Chatzinotas, Symeon Ottersten, Bjorn Univ Luxembourg Interdisciplinary Ctr Secur Reliabil Trust SnT L-1855 Luxembourg City Luxembourg Univ Toulouse ISAE SUPAERO F-31400 Toulouse France Eminence Deemed be Univ Shiv Nadar Inst Dept Elect Engn Delhi NCR Greater Noida 201314 India

Current trends in non-geostationary orbit (NGSO) satellite communications pose the challenge of attaining high spectral efficiency with low-complexity user terminals (UTs). In this context, this letter investigates the downlink/forward transmission of linear space-time block coded (STBC) signals through multiple geographically distributed NGSO satellites. As such, by combining the signals through multiple satellites, STBC provides a diversity advantage, which helps in combating the adverse effects of fading and interference at the UT. The main challenge of implementing such a scheme is the lack of time synchronization and the interference effect through a multi-satellite system toward the UT. To address this issue, we propose a digital receiver structure with multiple branches specifically designed to lock onto each satellite of the multi-satellite system, thus providing a solution for simple UT without requiring additional complexity in terms of radio-frequency components. Herein, we consider the zero-forcing (ZF) based diversity combining scheme while deriving the signal-to-interference-plus-noise ratio (SINR) expression at UT. Our results demonstrate the SINR improvement brought by the ZF combiner.

关键词： Satellite broadcasting Diversity reception Interference Satellites Symbols Signal to noise ratio Satellite antennas Diversity combining non-geostationary orbit satellite communication systems space-time block coding time misalignment zero-forcing

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