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2000 International Conference on Communication Technology(WCC2000·ICCT2000)

作者： Luo Cheng Li Gang Zhao Ming Yao Yan State Key Lab on Digital and Microwave Communications Tsinghua University

ISBN: (纸本)0780363949

In the IMT2000 DS-CDMA scheme,space time block coding based Transmit antenna Diversity(STTD ) is adopted as an anti-fading *** discussed the mathematics model of the STTD,and deduced an optimum demodulation algorithm for practical *** the end of this paper,we analyzed the performance of the optimum demodulator we bring *** scheme based on this model is easy to implement and has a good performance.

关键词： space time block coding STTD antenna diversity optimum demodulator mobile communications

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A Pipelined Schnorr - Euchner Sphere Decoder Architecture for MIMO Systems

A Pipelined Schnorr - Euchner Sphere Decoder Architecture fo...

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International Conference on Advanced Technologies for communications (ATC)

作者： Xuan-Nghia Nguyen Minh-Tuan Le Ngoc-Nam Pham Vu-Duc Ngo Hanoi Univ Sci & Technol Hanoi Vietnam Ha Noi Dept Sci & Technol Hanoi Vietnam Mobifone Cooperat Hanoi Vietnam

ISBN: (纸本)9781467383745

The combination of multiple-input multiple-output (MIMO) and space-time block coding (STBC) is a potential solution for increasing throughput and reliability in data transmission. A pipelined architecture for a Schnorr-Euchner algorithm based sphere decoder used in STBC systems is proposed in this paper. The architecture was designed for a 2x2 antenna system with 16-quadrature amplitude modulation (16-QAM). The architecture was synthesized and implemented on a Xilinx Virtex-7 FPGA. The implementation results have shown that the proposed architecture outperforms existing ones in terms of throughput and maximum clock frequency thanks to pipelined processing.

关键词： multiple input multiple output systems space time block coding ARCHITECTURE Building construction decoders Throughput data transmission Spheres

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Transceiver design for STBC transmission over MIMO multiple-access SC-FDE systems

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TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES 2018年第6期29卷 e3304-e3304页

作者： Sheikh-Hosseini, Mohsen Grad Univ Adv Technol Inst Sci & High Technol & Environm Sci Dept Comp & Informat Technol Kerman Iran

This paper investigates the transceiver design for a multiple-input multiple-output multiple-access system, J cochannel users each having Q antennas and an array-processing receiver employing M receive antennas, in which the single-carrier frequency-domain equalization technique is used as the physical layer solution for the transmission of different space-time block coding (STBC) schemes. Assuming quasi-static fading model and no channel state information at the user terminals, a transceiver design is provided for this system utilizing M=J receive antennas for interference cancellation, frequency-domain equalization, and detection of the users. First, this design is considered for orthogonal and generalized coordinate interleaved orthogonal design STBCs as 2 single-symbol decodable STBC schemes and then extended to quasi-orthogonal STBC as a double-symbol decodable STBC scheme. For this extension, each quasi-orthogonal system of J users and Q transmit antennas is converted to 2 orthogonal subsystems of J cochannel users each having Q antennas and then each subsystem is detected using the proposed method for orthogonal STBC transmission. Finally, the average bit error rate of the obtained designs is numerically illustrated for different STBC schemes with various numbers of users and transmitting antennas.

关键词： Orthogonal Channel state information transmitting antennas space time block coding generalized coordinates SUB-SYSTEM Transceivers

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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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A Near-Optimum Multiuser Receiver for STBC MC-CDMA Systems Based on Minimum Conditional BER Criterion and Genetic Algorithm-Assisted Channel Estimation

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EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2011年第unknown期2011卷 351494-351494页

作者： D'Orazio, Leandro Sacchi, Claudio Donelli, Massimo Louveaux, Jerome Vandendorpe, Luc Univ Trento Informat Engn & Comp Sci Dept DISI I-38123 Trento Italy Ctr Ric FIAT CRF Trento Branch I-38123 Trento Italy Catholic Univ Louvain Lab Telecommun & Teledetect B-1348 Louvain Belgium

The implementation of efficient baseband receivers characterized by affordable computational load is a crucial point in the development of transmission systems exploiting diversity in different domains. This would be a crucial point in the future development of 4G systems, where space, time, and frequency diversity will be combined together in order to increase system throughput. In this framework, a linear multiuser detector for MC-CDMA systems with Alamouti's space-time block coding (STBC), which is inspired by the concept of Minimum Conditional Bit Error Rate (MCBER), is proposed. The MCBER combiner has been implemented in adaptive way by using Least-Mean-Square (LMS) optimization. The estimation of Channel State Information (CSI), necessary to make practically feasible the MCBER detection, is aided by a Genetic Algorithm (GA). The obtained receiver scheme is near-optimal, as both LMS-based MCBER and GA-assisted channel estimation perform closely to optimum in fulfilling their respective tasks. Simulation results evidenced that the proposed receiver always outperforms state-of-the-art receiver schemes based on EGC and MMSE criterion exploiting the same degree of channel knowledge.

关键词： Multicarrier code division multiple access Transmission systems Receivers channel estimation Frequency diversity Conditional space time block coding multiuser receiver CDMA mobile communications

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Performance of Cross-Layer Design with Antenna Selection and Imperfect Feedback Information inMIMO Systems

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INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION 2012年第unknown期2012卷 328457.1-328457.9页

作者： Dang, Xiaoyu Yu, Xiangbin Chen, Xiaomin Nanjing Univ Aeronaut & Astronaut Coll Elect & Informat Engn Nanjing 210016 Jiangsu Peoples R China

By combining adaptive modulation and automatic repeat request, a cross-layer design (CLD) scheme for MIMO system with antenna selection (AS) and imperfect feedback is presented, and the corresponding performance is studied. Subject to a target packet loss rate and fixed power constraint, the variable switching thresholds of fading gain are derived. According to these results, and using mathematical manipulation, the average spectrum efficiency (SE) and packet error rate (PER) of the system are further derived. As a result, closed-form expressions of the average SE and PER are obtained, respectively. These expressions include the expressions under perfect channel state information as special cases and provide good performance evaluation for the system. Numerical results show that the proposed CLD scheme with antenna selection has higher SE than the existing CLD scheme with space-time block coding, and the CLD scheme with variable switching thresholds outperforms that with conventional-fixed switching thresholds.

关键词： Error analysis Channel state information ANTENNA multiple input multiple output systems Imperfect space time block coding feedback information Variable Performance Evaluation layer design Cross layer design Selenium antennae

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A diversity guarantee and SNR performance for unitary limited feedback MIMO systems

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EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2008年第unknown期2008卷 594928-1-594928-15-0页

作者： Mondal, Bishwarup Heath, Robert W., Jr. Univ Texas Austin Dept Elect & Comp Engn Austin TX 78712 USA

A multiple-input multiple-output (MIMO) wireless channel formed by antenna arrays at the transmitter and at the receiver offers high capacity and significant diversity. Linear precoding may be used, along with spatial multiplexing (SM) or space-time block coding (STBC), to realize these gains with low-complexity receivers. In the absence of perfect channel knowledge at the transmitter, the precoding matrices may be quantized at the receiver and informed to the transmitter using a feedback channel, constituting a limited feedback system. This can possibly lead to a performance degradation, both in terms of diversity and array gain, due to the mismatch between the quantized precoder and the downlink channel. In this paper, it is proven that if the feedback per channel realization is greater than a threshold, then there is no loss of diversity due to quantization. The threshold is completely determined by the number of transmit antennas and the number of transmitted symbol streams. This result applies to both SM and STBC with unitary precoding and confirms some conjectures made about antenna subset selection with linear receivers. A closed form characterization of the loss in SNR (transmit array gain) due to precoder quantization is presented that applies to a precoded orthogonal STBC system and generalizes earlier results for single-stream beamforming. Copyright (C) 2008 B. Mondal and R. W. Heath, Jr.

关键词： transmitting antennas Feedback degradation of performance Transmitter prediction coding Unitary multiple input multiple output systems Samarium Antenna arrays space time block coding Receivers feedback channel signal to noise ratios

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Performance Analysis of Two-Hop OSTBC Transmission over Rayleigh Fading Channels

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EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2010年第unknown期2010卷 649541-649541页

作者： Li, Guangping Blostein, Steven D. Qin, Jiayin Queens Univ Dept Elect & Comp Engn Kingston ON K7L 3N6 Canada Guangdong Univ Technol Fac Informat Engn Guangzhou 510006 Guangdong Peoples R China Sun Yat Sen Univ Dept Elect & Commun Engn Guangzhou 510275 Guangdong Peoples R China

A two-hop amplify and forward (AF) relay system is considered where source and destination are each equipped with multiple antennas while the relay has a single antenna. Orthogonal space-time block coding (OSTBC) is employed at the source. New exact expressions for outage probability in Rayleigh fading as well as symbol error rate (SER) expressions for a variety of modulation schemes are derived. The diversity order of the system is evaluated. Monte Carlo simulations demonstrate the accuracy of the analyses presented. Results that can be extended to relay systems with a direct source-destination link are also highlighted. To put the results in context, the two-hop system performance is then compared to that of a MIMO point-to-point system. Finally, the new analysis is applied to evaluate two-hop system performance as a function of relay location.

关键词： Raleigh fading channels System performance relay Rayleigh fading destination multiple antenna space time block coding Monte Carlo technique Instruction repertory POINT TO POINT SYSTEMS accuracy analysis Relay systems

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An inter user interference cancellation scheme for two users in full-duplex MIMO system

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EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2018年第1期2018卷 1页

作者： Na, Hyunjong Lee, Chungyong Yonsei Univ Dept Elect & Elect Engn C418 Seoul 03722 South Korea Yonsei Univ Dept Elect & Elect Engn C527 Seoul 03722 South Korea

The inter-user interference is a critical performance degradation factor in a full-duplex multi-user system. However, the conventional pre-processing filters, such as null space projection filter and regularized channel inversion filter, are unsuitable for user pre-processing filter when each user has the same number of transmit and receive antennas. Thus, we propose an inter-user-interference cancellation scheme applicable to the users with the same number of transmit and receive antennas. By summing the received signals for two symbol periods, the proposed scheme can cancel inter-user interference and obtain a twofold diversity order. The simulation results show that the proposed scheme obtains higher spectral efficiency than the half-duplex system.

关键词： Full duplex Inter-user interference space time block coding Adaptive modulation

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Performance of Source transmit Antenna selection for MIMO cooperative communication System Based DF protocol: Symbol Error Rate and Diversity order

Performance of Source transmit Antenna selection for MIMO co...

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International Conference on Wireless Networks and Mobile Communications (WINCOM)

作者： Bouteggui, Mokhtar Merazka, Fatiha USTHB Univ Telecommun Dept LISIC Lab Algiers Algeria

ISBN: (纸本)9781538621233

In this work, we study the performance of a single relay Multiple Input Multiple Output (MIMO) cooperative communication system based on Decode and Forward (DF) relaying protocol for two strategies using transmit antenna selection at the source. The first strategy uses one antenna between the relay and the destination, and the second strategy uses space time block coding (STBC). All channels follow the Rayleigh fading distribution. We derive the expression and Upper Bound for Symbol Error Rate (SER) for M-ary Phase Shift Keying (M-PSK), and the diversity order for both strategies. The analytical results show that the second strategy performs better than the first one for the same diversity order and the same Rate R.

关键词： MIMO Cooperative Communication Antenna Selection space time block coding

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