Wireless Mimo Ofdm Systems With Coherent And Non Coherent Detection
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Wireless Mimo Ofdm Systems With Coherent And Non Coherent Detection
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Author : Alexander Vanaev
language : en
Publisher: Cuvillier Verlag
Release Date : 2013-02-05
Wireless Mimo Ofdm Systems With Coherent And Non Coherent Detection written by Alexander Vanaev and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-02-05 with Technology & Engineering categories.
In this thesis the physical layer design of broadband MIMO-OFDM communication systems is considered taking into account the realistic multipath radio channel. The main focus is made on examining a number of coherent and non-coherent MIMO techniques both analytically and via computer simulations. Several proposals are made to assist intelligent selection of MIMO precoding and decoding algorithms. Additionally two novel improved differential transmission schemes are presented and analyzed. In dieser Arbeit wird der Entwurf der physikalischen Schicht für breitbandige MIMO-OFDM Kommunikationssysteme betrachtet. Dazu werden realistische Funkkanalmodelle mit Mehrwegeausbreitung berücksichtigt. Ein wesentlicher Schwerpunkt der Arbeit liegt auf Untersuchungen zu kohärenten und nichtkohärenten MIMO-Techniken, die sowohl analytisch als auch mit Hilfe von Computersimulationen durchgeführt werden. Es werden verschiedene Vorschläge erarbeitet, wie eine intelligente Auswahl von MIMO-Techniken zur Vorcodierung sowie zur Decodierung getroffen werden kann. Darüber hinaus werden zwei neuartige, verbesserte differentielle Übertragungsverfahren vorgestellt und analysiert.
Mimo Ofdm For Lte Wifi And Wimax
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Author : Lajos Hanzo
language : en
Publisher: John Wiley & Sons
Release Date : 2012-01-03
Mimo Ofdm For Lte Wifi And Wimax written by Lajos Hanzo and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-03 with Technology & Engineering categories.
MIMO-OFDM for LTE, WIFI and WIMAX: Coherent versus Non-Coherent and Cooperative Turbo-Transceivers provides an up-to-date portrayal of wireless transmission based on OFDM techniques augmented with Space-Time Block Codes (STBCs) and Spatial-Division Multiple Access (SDMA). The volume also offers an in-depth treatment of cutting-edge Cooperative Communications. This monograph collates the latest techniques in a number of specific design areas of turbo-detected MIMO-OFDM wireless systems. As a result a wide range of topical subjects are examined, including channel coding and multiuser detection (MUD), with a special emphasis on optimum maximum-likelihood (ML) MUDs, reduced-complexity genetic algorithm aided near-ML MUDs and sphere detection. The benefits of spreading codes as well as joint iterative channel and data estimation are only a few of the radical new features of the book. Also considered are the benefits of turbo and LDPC channel coding, the entire suite of known joint coding and modulation schemes, space-time coding as well as SDM/SDMA MIMOs within the context of various application examples. The book systematically converts the lessons of Shannon's information theory into design principles applicable to practical wireless systems; the depth of discussions increases towards the end of the book. Discusses many state-of-the-art topics important to today's wireless communications engineers. Includes numerous complete system design examples for the industrial practitioner. Offers a detailed portrayal of sphere detection. Based on over twenty years of research into OFDM in the context of various applications, subsequently presenting comprehensive bibliographies.
Signal Processing Channel Estimation And Link Adaptation In Mimo Ofdm Systems
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Author : Jianjun Ran
language : en
Publisher: Cuvillier Verlag
Release Date : 2008
Signal Processing Channel Estimation And Link Adaptation In Mimo Ofdm Systems written by Jianjun Ran and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Coherent Receiver For Turbo Coded Single User Massive Mimo Ofdm With Retransmissions
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Author : Kasturi Vasudevan
language : en
Publisher:
Release Date : 2019
Coherent Receiver For Turbo Coded Single User Massive Mimo Ofdm With Retransmissions written by Kasturi Vasudevan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Electronic books categories.
Single-user massive multiple-input multiple-output (MIMO) systems have a large number of antennas at the transmitter and receiver. This results in a large overall throughput (bit-rate), of the order of tens of gigabits per second, which is the main objective of the recent fifth-generation (5G) wireless standard. It is feasible to have a large number of antennas in mm-wave frequencies, due to the small size of the antennas. This chapter deals with the coherent detection of orthogonal frequency division multiplexed (OFDM) signals transmitted through frequency-selective Rayleigh fading MIMO wireless channels. Low complexity, discrete-time algorithms are developed for channel estimation, carrier and timing synchronization, and finally turbo decoding of the data at the receiver. Computer simulation results are presented to validate the theory.
Non Coherent Ofdm Techniques
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Author : Thanthulage Nirmal Chathura Fernando
language : en
Publisher:
Release Date : 2014
Non Coherent Ofdm Techniques written by Thanthulage Nirmal Chathura Fernando and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Future indoor wireless networks will need alternative RF spectral resources to support the multi-gigabit per second (Gb/s) data speeds demanded by next generation multimedia applications. Although RF spectra in millimeter-wave, terahertz and optical bands are relatively uncongested, the communication systems operating in these frequency bands are difficult to implement, since they often suffer from stability problems due to the very high carrier frequencies. Hence, new physical layer technologies that can offer stable and low-complexity transceivers need to be developed.In this research work, non-coherent orthogonal frequency division multiplexing (OFDM) is studied to meet this demand. Non-coherent OFDMs can mitigate inter-symbol interference caused by channel frequency selectivity and achieve high spectral efficiency. Moreover, compared to conventional OFDMs, non-coherent OFDM uses simple passive direct detection without the need of complex RF frontend components such as mixers and oscillators. In this study, various non-coherent OFDM schemes with new detection enhancements are proposed to improve the performance of millimeter-wave, terahertz, optical, and optical wireless communication systems. It is shown analytically and by simulation that the proposed non-coherent OFDMs offer better bit error rate performance with much lower complexity, when compared to conventional OFDMs. In addition, a simple non-linear pre-distortion technique is explored to further improve the spectral efficiency of non-coherent OFDMs. Finally, space-time block coded (STBC) multiple-input multiple-output (MIMO) transmissionschemes are incorporated with the proposed non-coherent OFDMs to offer improved system performance.
Coherent And Non Coherent Data Detection Algorithms In Massive Mimo
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Author : Haider Ali Jasim Alshamary
language : en
Publisher:
Release Date : 2017
Coherent And Non Coherent Data Detection Algorithms In Massive Mimo written by Haider Ali Jasim Alshamary and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Algorithms categories.
Over the past few years there has been an extensive growth in data traffic consumption devices. Billions of mobile data devices are connected to the global wireless network. Customers demand revived services and up-to-date developed applications, like real-time video and games. These applications require reliable and high data rate wireless communication with high throughput network. One way to meet these requirements is by increasing the number of transmit and/or receive antennas of the wireless communication systems. Massive multiple-input multiple-output (MIMO) has emerged as a promising candidate technology for the next generation (5G) wireless communication. Massive MIMO increases the spatial multiplexing gain and the data rate by adding an excessive number of antennas to the base station (BS) terminals of wireless communication systems. However, building efficient algorithms able to decode a coherently or non-coherently large flow of transmitted signal with low complexity is a big challenge in massive MIMO. In this dissertation, we propose novel approaches to achieve optimal performance for joint channel estimation and signal detection for massive MIMO systems. The dissertation consists of three parts depending on the number of users at the receiver side. In the first part, we introduce a probabilistic approach to solve the problem of coherent signal detection using the optimized Markov Chain Monte Carlo (MCMC) technique. Two factors contribute to the speed of finding the optimal solution by the MCMC detector: The probability of encountering the optimal solution when the Markov chain converges to the stationary distribution, and the mixing time of the MCMC detector. First, we compute the optimal value of the "temperature'' parameter such that the MC encounters the optimal solution in a polynomially small probability. Second, we study the mixing time of the underlying Markov chain of the proposed MCMC detector.
Non Coherent Detection For Ofdm System With Transmit Diversity
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Author : Wahidah Hashim
language : en
Publisher:
Release Date : 2008
Non Coherent Detection For Ofdm System With Transmit Diversity written by Wahidah Hashim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Orthogonal frequency division multiplexing categories.
Broadband Access Networks
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Author : Abdallah Shami
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-01-23
Broadband Access Networks written by Abdallah Shami and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-23 with Technology & Engineering categories.
Considering the key evolutions within the access network technologies as well as the unprecedented levels of bandwidth demands by end users, this book condenses the relentless research, design, and deployment experience of state-of-the-art access networks. Furthermore, it shares the critical steps and details of the developments and deployment of these emergent technologies; which is very crucial particularly as telecommunications vendors and carriers are looking for cost-effective ultra-broadband “last-mile” access solutions to stay competitive in the “post bubble” era. The book is written to provide a comprehensive overview of the major broadband access technologies and deployments involving internationally recognized authors and key players. Due to its scope and depth, the proposed book is able to fill an important gap of today’s available literature.
Mimo Communications
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Author : Ahmed Kishk
language : en
Publisher: BoD – Books on Demand
Release Date : 2023-12-20
Mimo Communications written by Ahmed Kishk and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-12-20 with Technology & Engineering categories.
Multiple-input, multiple-output (MIMO) communication technology has become a critical enabler for high-speed wireless communication systems. This edited volume, MIMO Communications – Fundamental Theory, Propagation Channels, and Antenna Systems, is a comprehensive resource for researchers, graduate students, and practicing engineers in wireless communication. The volume is divided into four parts that cover the foundations of wireless communications, antenna techniques, channel modeling, autonomous driving and radars. Experts in the field have authored chapters covering various topics, including capacity analysis of MIMO channels, antenna array design and beamforming techniques, channel modeling and estimation, and the applications of autonomous driving and radars. This book provides a detailed and accessible introduction to the latest research and practical applications in MIMO communication technology. It is an essential resource for anyone interested in learning about MIMO communication technology or looking to deepen their understanding of existing systems.
Advanced Wireless Communications
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Author : Savo G. Glisic
language : en
Publisher: John Wiley & Sons
Release Date : 2007-06-13
Advanced Wireless Communications written by Savo G. Glisic and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-13 with Technology & Engineering categories.
Fully revised and updated version of the successful "AdvancedWireless Communications" Wireless communications continue to attract the attention ofboth research community and industry. Since the first edition waspublished significant research and industry activities have broughtthe fourth generation (4G) of wireless communications systemscloser to implementation and standardization. "Advanced Wireless Communications" continues to provide acomparative study of enabling technologies for 4G. This secondedition has been revised and updated and now includes additionalinformation on the components of common air interface, includingthe area of space time coding , multicarrier modulation especiallyOFDM, MIMO, cognitive radio and cooperative transmission. Ideal for students and engineers in research and development inthe field of wireless communications, the second edition ofAdvanced Wireless Communications also gives an understanding tocurrent approaches for engineers in telecomm operators, governmentand regulatory institutions. New features include: Brand new chapter covering linear precoding in MIMO channelsbased on convex optimization theory. Material based on game theory modelling encompassing problemsof adjacent cell interference, flexible spectra sharing andcooperation between the nodes in ad hoc networks. Presents and discusses the latest schemes for interferencesuppression in ultra wide band (UWB) cognitive systems. Discusses the cooperative transmission and more details onpositioning.