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Blind digital modulation classification for STBC-OFDM system in presence of CFO and channels estimation errors

IET COMMUNICATIONS 2019年第17期13卷 2827-2833页

作者： Dehri, Brahim Besseghier, Mokhtar Djebbar, A. B. Dayoub, Iyad Univ Djillalil Liabes Sidi Bel Abbes Lab TTNS Sidi Bel Abbes Algeria Univ Mustapha Stambouli Mascara Mascara Algeria Univ Lille Univ Polytech Hautsde De France CNRS ISENCent LilleUMR 8520IEMNDOAE Valenciennes France

Here, the authors propose a robust blind digital modulation classification (BDMC) algorithm for space time block coding (STBC)-based MIMO-OFDM system in the presence of carrier frequency offset (CFO) and channel estimation errors. Previous papers published on the topic of modulation identification were limited to single-carrier systems operating over frequency-flat channels. The problem of joint channel and CFO estimation in conjunction with blind digital modulation classification for STBC-OFDM in frequency selective channel and in the presence of the impulsive noise has not been addressed before to the best of their knowledge. To cope with performance degradation of BDMC due to CFO and channels errors, they propose joint semi-blind CFO and channels estimation methods. Higher order statistics (HOS), used for feature extraction, are combined with pattern recognition methods to solve the modulation identification problem. The main contribution of their work is the development of estimators, the study of their impacts on the blind classification capability, and the use of simulations to demonstrate the superior performance of the proposed algorithms.

关键词： higher order statistics channel estimation feature extraction OFDM modulation signal classification MIMO communication space-time block codes impulse noise frequency selective channel modulation identification problem STBC-OFDM system channel estimation errors single-carrier systems frequency-flat channels carrier frequency offset robust blind digital modulation classification algorithm space time block coding MIMO-OFDM system semiblind CFO estimation BDMC algorithm higher order statistics HOS feature extraction impulsive noise pattern recognition methods

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Doppler Compensated space-time block coding for Multistatic Radar Systems

Doppler Compensated Space-Time Block Coding for Multistatic ...

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IEEE Radar Conference

作者： Jabran Akhtar Norwegian Defence Research Establishment (FFI)

ISBN: (纸本)9781467357920

space-time block coding techniques are useful for multistatic/MIMO radar systems as they allow for the use of non-orthogonal waveforms while providing waveform diversity with full signal separation. block coding, however, necessitates the assumption of no or negligible target motion. This paper attempts to alleviate the issue of target Doppler shifts by introducing an adaptive block coding scheme. The modified block code is appropriately tailored to make certain that the detection degradation caused by Doppler shift remains tolerable at the expense of lower emit antenna power. This work can be seen as bridging the gap between the usage of a full block code in the existence of no target Doppler and the emission of a single, but Doppler resilient, waveform with extensive object motion. Simulations are used to demonstrate how adaptation of a block code significantly reduces some of the issues caused by target motion providing detectional benefits.

关键词： block codes Doppler effect space time block coding waveform diversity multistatic radar non-orthogonal Codes Targets waveforms

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Performance evaluation of a downlink MIMO wideband code-division multiple access-based radio-over-fibre system using Alamouti space-time block code

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IET COMMUNICATIONS 2019年第8期13卷 955-962页

作者： Baghersalimi, Gholamreza Rahimi, Mohammad Nassiri, Mahdi Univ Guilan Dept Elect Engn Rasht Iran

In this work, the effect of a radio-over-fibre (RoF) subsystem on the bit error rate (BER), total degradation (TD) and system capacity performances of downlink multiple-input multiple-output (MIMO) wideband code division multiple access (WCDMA) are assessed. The research investigates the use of maximal ratio combining (MRC) in single-input multiple-output (SIMO) schemes and Alamouti space-time block coding (STBC) in MIMO systems to compensate for the collective effects of the optical subsystem and the radio channel for different channel conditions and number of users. Results show that the aforementioned techniques are effective methods to compensate for both the non-linearity of the optical subsystem and the time-varying wireless radio frequency (RF) channel. It is also demonstrated that by increasing the number of users for severe non-linearity conditions, the BER performance of the system is significantly affected. Also, an appropriate quiescent point can always be found for the optical subsystem which improves the system performance irrespective of different conditions.

关键词： System performance bit error rate performance multiple input multiple output systems space time block coding SUB-SYSTEM wireless channels nonlinearity WCDMA

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Application of Machine Learning to Multi Antenna Transmission and Machine Type Resource Allocation

Application of Machine Learning to Multi Antenna Transmissio...

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作者： Emenonye, Don-Roberts Ugochukwu Virginia Tech | University

Wireless communication systems is a well-researched area in electrical engineering that has continually evolved over the past decades. This constant evolution and development have led to well-formulated theoretical baselines in terms of reliability and efficiency. However, most communication baselines are derived by splitting the baseband communications into a series of modular blocks like modulation, coding, channel estimation, and orthogonal frequency modulation. Subsequently, these blocks are independently optimized. Although this has led to a very efficient and reliable process, a theoretical verification of the optimality of this design process is not feasible due to the complexities of each individual block. In this work, we propose two modifications to these conventional wireless systems. First, with the goal of designing better space-time block codes for improved reliability, we propose to redesign the transmit and receive blocks of the physical layer. We replace a portion of the transmit chain - from modulation to antenna mapping with a neural network. Similarly, the receiver/decoder is also replaced with a neural network. In other words, the first part of this work focuses on jointly optimizing the transmit and receive blocks to produce a set of space-time codes that are resilient to Rayleigh fading channels. We compare our results to the conventional orthogonal space-time block codes for multiple antenna configurations. The second part of this work investigates the possibility of designing a distributed multiagent reinforcement learning-based multi-access algorithm for machine type communication. This work recognizes that cellular networks are being proposed as a solution for the connectivity of machine type devices (MTDs) and one of the most crucial aspects of scheduling in cellular connectivity is the random access procedure. The random access process is used by conventional cellular users to receive an allocation for the uplink transmissions. This proc

关键词： Machine Type Communication space time block coding Deep Learning Reinforcement Learning Thesis

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On the Application of MIMO space-time coding to Physical Layer Security in sub-6 GHz 5G 14

On the Application of MIMO Space-Time Coding to Physical Lay...

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14th Annual Conference System of Systems Engineering (SoSE)

作者： Ormond, Patrick Yerrapragada, Anil Kumar Kelley, Brian Univ Texas San Antonio Dept Elect & Comp Engn San Antonio TX 78249 USA

ISBN: (纸本)9781728104577

This paper investigates the application and performance improvement of MIMO space time block coding (STBC) for Physical Layer Security. The paper analyzes a Precoder Matrix Index (PMI) based scheme called Private Random Pre-coding (PRP). Key-based Physical Layer Security protects against eavesdroppers in wireless communication links, invaluable in emerging SG and IoT networks. This paper derives improvements in PRP based on STBC. Also presented are simulation results which show as much as 7 dB improvement in Key bit Error Rate performance vs SINR of the enhanced PRP-STBC scheme for a 1-bit codebook at the cost of decreased transmission rate. In addition, the paper derives a closed form expression for the Key bit Error Rate for both the PRP and enhanced PRP-STBC schemes as a function of dense SG cellular geometries. Furthermore, we present the effective information rate of the PRP key based communication framework in low SNR scenarios.

关键词： 5G mobile communication error statistics matrix algebra MIMO communication precoding space-time block codes telecommunication security space time block coding telecommunication security MIMO communication prediction coding matrix algebra Physical layer MSMB gene POTENTIALLY RESPONSIBLE PARTIES Error analysis time coding Information rates bit error rate performance

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Closed form Capacity expression of Spatial modulation using Hypergeometric series

Closed form Capacity expression of Spatial modulation using ...

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International Conference on Computation, Automation and Knowledge Management (ICCAKM)

作者： Hanumantharao Bitra Palanisamy Ponnusamy National Institute of Technology Tiruchirappalli Tamil Nadu India

ISBN: (数字)9781728106663

ISBN: (纸本)9781728106670

The spatial modulation (SM) scheme is one of the prominent techniques in a multi-input multi-output (MIMO) system that attracted major studies in 5G technology. It gives an additional spatial dimension such as an antenna index, which can be used by both signal space and spatial dimension for data transmission. In this paper, closed-form capacity expression of SM for 2 × 1 system is derived based on the hypergeometric series. Results demonstrate that closed-form capacity expression gives superior performance when compared to numerical results of SM and space-time block codes (STBC).

关键词： 5G mobile communication channel capacity MIMO communication space-time block codes wireless channels MIMO communication wireless channels hypergeometric series space time block coding Channel capacity Samarium SPATIAL MODULATION signal space data transmission closed forms

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A Novel Cooperative MIMO Transmission Scheme Based on STBC for Event-Driven WSNs

A Novel Cooperative MIMO Transmission Scheme Based on STBC f...

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International Conference on Electronics Technology (ICET)

作者： Li Jun Xie Wujun Aviation Key Laboratory of Science and Technology on Life-support Technology AVIC Aerospace Life-support Industries LTD. Xiangyang China

ISBN: (数字)9781728162836

ISBN: (纸本)9781728162843

The cooperative MIMO (CMIMO) technology having characteristics of low energy expended and high reliability can be very well suited to resource-constrained event-driven wireless sensor networks (WSNs), in which collecting date is unpredictable for space and time. A novel energy-efficient STBC-based CMIMO transmission scheme is put forward for event-driven WSNs in this letter, which adopts cross-layer design and dynamic event cluster. Detailed energy models are developed to maximize energy saving by the joint optimization for the number of cooperative nodes and constellation size. Through computer simulation, It can be found that the novel transmission scheme saves more energy in comparison with the traditional transmission protocol.

关键词： CMIMO event-driven WSNs energy-efficient STBC the joint optimization even-driven program space time block coding Energy efficiency transport protocols ENERGY MODELS multiple input multiple output systems

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Incremental relaying cooperative networks with dual transmit diversity

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COMPUTERS & ELECTRICAL ENGINEERING 2018年 65卷 496-515页

作者： Khodeir, Mahmoud Hayajneh, Ali Pourvali, Mahsa Ghani, Nasir Jordan Univ Sci & Technol Dept Elect Engn Irbid Jordan Univ S Florida Dept Elect Engn Tampa FL 33620 USA

This paper studies the performance of cooperative wireless networks using incremental relaying and dual transmit diversity with the simple orthogonal space time block coding (OSTBC) scheme. The proposed model is studied by utilizing different relaying schemes including decode and forward (DF), amplify and forward (AF), and adaptive incremental relaying (i.e., best relay selection) with DF relaying. In particular, upper-bounded expressions are derived for the averagebit error rate (BER), signal to noise ratio (SNR) outage probability, average achievable rate, and normalized throughput. Detailed results show that the dual transmit diversity approach outperforms the regular incremental relaying cooperative diversity scheme in terms of transmission power and channel efficiency for the same transmit power. Moreover, best relay selection with multiple relaying nodes outperforms fixed incremental DF relaying, especially for lower transmitted SNR values. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： Incremental-relaying Maximal ratio combining Error performance Outage probability space time block coding Rayleigh fading

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Spectral efficiency analysis of rate-adaptive user selection diversity in orthogonal space time block coding multiple-input multiple-output systems with antenna selection

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IET COMMUNICATIONS 2011年第5期5卷 629-643页

作者： Torabi, M. Haccoun, D. Ajib, W. Ecole Polytech Dept Elect Engn Montreal PQ H3T 1J4 Canada Univ Quebec Dept Comp Sci Montreal PQ H3C 3P8 Canada

In this study, the performance of user selection diversity for rate-adaptive multiuser multiple-input multiple-output (MIMO) systems employing orthogonal space time block coding (OSTBC) is analysed and evaluated. An antenna selection scheme is used to overcome the drawback of channel hardening effects in multiuser MIMO systems. Closed-form expressions for the average spectral efficiency and outage probability of the system are derived. Using numerical evaluations the considered schemes are compared in terms of outage probability and spectral efficiency. The effects of antenna correlation at the receiver ends on the performance of the system are analysed and evaluated, indicating that spatial correlation may be beneficial for the spectral efficiency of the multiuser OSTBC MIMO systems employing user selection.

关键词： spectral efficiency output system spacetime multiple input multiple output systems space time block coding

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Scalable and Adaptable Diversity/Multiplexing Trade-Off in a Multi-User Massive-MIMO Environment

Scalable and Adaptable Diversity/Multiplexing Trade-Off in a...

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Signal, Control and Communication (SCC), International Conference on

作者： Halima Bergaoui Yosra Mlayah Fethi Tlili Fatma Rouissi Sup’Com/Grescom

ISBN: (数字)9781728135960

ISBN: (纸本)9781728135977

This paper inquires into the deployment of a scalable and adaptable diversity/multiplexing trade-off in a multi-user massive MIMO context. It studies the BER of an embedded switching between the ZF spatial multiplexing and the Alamouti STBC when it is combined with three beamforming techniques: the ZF-beamforming, the STBC-adaptive beamforming, and the spatial multiplexing-adaptive beamforming. It is shown that the embedded switching technique is efficient when it is combined with the STBC-adaptive beamforming as well as the spatial multiplexing-adaptive beamforming. Besides, it offers an improvement of SNR=8db compared to when it is combined with the ZF-beamforming.

关键词： Adaptation Massive MIMO Beamforming STBC Spatial Multiplexing Beamforming space division multiplexing space time block coding Scalability embedding tradeoffs

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