Self Interference Cancellation In Full Duplex Communication Systems

Download Self Interference Cancellation In Full Duplex Communication Systems full books in PDF, epub, and Kindle. Read online Self Interference Cancellation In Full Duplex Communication Systems ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Full-Duplex Wireless Communications Systems

Author : Tho Le-Ngoc
Publisher : Springer
ISBN 13 : 3319576909
Total Pages : 170 pages
Book Rating : 4.3/5 (195 download)

DOWNLOAD NOW!

Book Synopsis Full-Duplex Wireless Communications Systems by : Tho Le-Ngoc

Download or read book Full-Duplex Wireless Communications Systems written by Tho Le-Ngoc and published by Springer. This book was released on 2017-07-02 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the development of self-interference (SI)-cancellation techniques for full-duplex wireless communication systems. The authors rely on estimation theory and signal processing to develop SI-cancellation algorithms by generating an estimate of the received SI and subtracting it from the received signal. The authors also cover two new SI-cancellation methods using the new concept of active signal injection (ASI) for full-duplex MIMO-OFDM systems. The ASI approach adds an appropriate cancelling signal to each transmitted signal such that the combined signals from transmit antennas attenuate the SI at the receive antennas. The authors illustrate that the SI-pre-cancelling signal does not affect the data-bearing signal. This book is for researchers and professionals working in wireless communications and engineers willing to understand the challenges of deploying full-duplex and practical solutions to implement a full-duplex system. Advanced-level students in electrical engineering and computer science studying wireless communications will also find this book useful as a secondary textbook.

Self-interference Cancellation for Full-duplex Wireless Communication Systems

Author : Ahmed Masmoudi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (964 download)

DOWNLOAD NOW!

Book Synopsis Self-interference Cancellation for Full-duplex Wireless Communication Systems by : Ahmed Masmoudi

Download or read book Self-interference Cancellation for Full-duplex Wireless Communication Systems written by Ahmed Masmoudi and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Full-duplex operation for wireless communications can potentially double the spectral efficiency, compared to half-duplex operation, by using the same wireless resource to transmit and receive at the cost of a large power difference between the high-power self-interference (SI) from its own transmitted signal and the low-power intended signal received from the other distant transceiver. The SI can be gradually reduced by a combination of radiofrequency (RF) and baseband cancellation stages. Each stage requires the estimation of the different distortions that the SI endures such as the SI channel and the transceiver nonlinearities. This thesis deals with the development of SI-cancellation techniques that are well-adapted to the full-duplex operation.First, we recognize the sparseness of the SI channel and exploit it to develop a compressedsensing (CS) based SI channel estimator. The obtained estimate is used to reduce the SI at the RF prior to the receiver low-noise amplifier and analog-to- digital converter to avoid overloading them. To further reduce the SI, a subspace-based algorithm is developed to jointly estimate the residual SI channel, the intended channel between the two transceivers and the transmitter nonlinearities for the baseband cancellation stage. Including the unknown received intended signal in the estimation process represents the main advantage of the proposed algorithm compared to previous data-aided estimators that assume the intended signal as additive noise. By using the second-order statistics of the received signal, it is possible to obtain the noise subspace and then to estimate the different coefficients without knowing the intended signal. Depending on the number of transmit and receive antennas, we propose to use either the received signal or a combination of the received signal and its complex conjugate. Also, we develop a semi-blind maximum likelihood (ML) estimator that combines the known pilot and unknown data symbols from the intended transceiver to formulate the likelihood function. A closed-form expression of the ML solution is first derived, and an iterative procedure is developed to further improve the estimation performance at moderate to high signal-to-noise ratio. Simulations show significant improvement in SI-cancellation gain compared to the data-aided estimators. Moreover, we present two new SI-cancellation methods using active signal injection (ASI) for full-duplex MIMO-OFDM systems. The ASI approach adds an appropriate cancelling signal to each transmitted signal such that the combined signals from transmit antennas attenuate the SI at the receive antennas. In the first method, the SI-pre-cancelling signal uses some reserved subcarriers which do not carry data. In the second method, the constellation points are dynamically extended within the constellation boundary in order to minimize the received SI. Thus, the SI-pre-cancelling signal does not affect the data-bearing signal. Simulation results show that the proposed methods considerably reduce the SI at a modest computational complexity." --

Integrated Self-Interference Cancellation for Full-Duplex and Frequency-Division Duplexing Wireless Communication Systems

Author : Jin Zhou
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (982 download)

DOWNLOAD NOW!

Book Synopsis Integrated Self-Interference Cancellation for Full-Duplex and Frequency-Division Duplexing Wireless Communication Systems by : Jin Zhou

Download or read book Integrated Self-Interference Cancellation for Full-Duplex and Frequency-Division Duplexing Wireless Communication Systems written by Jin Zhou and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To enable experimental characterization of full-duplex MAC layer algorithms, a cross-layered software-defined full-duplex radio testbed has been developed. In collaboration with researchers from the field of micro-electro-mechanical systems, we demonstrate a multi-band frequency-division duplexing system using a cavity-filter-based tunable duplexer and our integrated widely-tunable self-interference-cancelling receiver.

Self-Interference Cancellation in Full-duplex Communication Systems

Author : Ruozhu Li
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (1 download)

DOWNLOAD NOW!

Book Synopsis Self-Interference Cancellation in Full-duplex Communication Systems by : Ruozhu Li

Download or read book Self-Interference Cancellation in Full-duplex Communication Systems written by Ruozhu Li and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Full-duplex (FD) wireless communications can potentially double the spectral efficiency by transmitting and receiving simultaneously over the same frequency at a cost of a large power difference between the high-power self-interference (SI), and the low-power intended signal received from the remote transmitter. SI can be reduced gradually by a combination of radio-frequency (RF) and baseband SI-cancellation stages. Each stage requires the estimation of various distortions that the SI endures, such as SI-channel and transceiver nonlinearities. This thesis deals with the development of SI-cancellation techniques that are well adapted to FD operations.We address SI-cancellation for FD operations in the presence of imperfect RF components. In particular, we develop a new scheme to jointly estimate the IQ mixer imbalance, power amplifier (PA) nonlinearities, up-/down-conversion phase-noise and SI-channel. First, we study and develop a baseband model that captures the most significant transceiver RF imperfections, for both separate- and common-oscillator structures used in the up- and down-conversions. A basis expansion model (BEM) is then derived to approximate the time-varying phase-noise, and to transform the problem of estimating the time-varying phase-noise into the estimation of a set of static coefficients. Using the method of maximum likelihood (ML) criterion, the likelihood function is derived in the presence of the unknown intended signal, which leads to the joint estimation of the intended channel, the SI-channel, the nonlinear impairments and the phase-noise. When the intended signal is unknown, an iterative procedure is developed to find the ML estimate of the different parameters based on its own known transmitted data, the known pilot symbols, and the statistic of the unknown intended signal received from the intended transmitter. We consider the two pilot-insertion structures used in LTE for the frequency-multiplexed pilots and the time-multiplexed pilots. Compared to training-based techniques, the full use of the received signal significantly reduces the required number of pilot symbols. Simulation results indicate that the proposed algorithms can offer a superior SI-cancellation performance, with the resulting signal-to-SI-and-noise ratio (SINR) being very close to the signal-to-noise ratio (SNR).Moreover, we study the power of SI after each cancellation stage, taking into account the transceiver impairments. One SI-cancellation scheme, which combines antenna cancellation, RF cancellation and digital cancellation, provides results from real world experiments that show the feasibility of an FD design. In general, it is difficult to assess the exact level of the SI reduction that is obtainable due to the interactions among factors such as transceiver impairments, wireless propagation channel and estimation error. We hereby identify the main factors that affect the cancellation performance. This allows for a better understanding of the obtained performance, and leads to the development of new methods that improves the cancellation capability of FD systems. We address the impact of each transceiver impairment in FD systems, and specify the limiting factors of the RF and baseband SI-cancellation stages for a given architecture. In addition, we demonstrate that reducing the SI before the LNA/ADC, via the RF SI-cancellation stage is necessary to avoid high quantization noise from the ADC. The analysis further reveals that the transmitter nonlinearities need to be modeled and canceled in the baseband SI-cancellation stage. Finally, in light of our simulation results, we discuss the trade-off between the amount of SI-cancellation and the number of cancellation stages, and propose the potential case scenarios for operations with one digital cancellation." --

Self-interference Cancellation in Full-duplex Radio

Author : Yifan Li
Publisher :
ISBN 13 : 9781369833393
Total Pages : 106 pages
Book Rating : 4.8/5 (333 download)

DOWNLOAD NOW!

Book Synopsis Self-interference Cancellation in Full-duplex Radio by : Yifan Li

Download or read book Self-interference Cancellation in Full-duplex Radio written by Yifan Li and published by . This book was released on 2017 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: With fast increasing demand of the wireless network, the current spectrum used for commercial wireless communication becomes very crowed. So it is critical to find an more efficient way to make the limited spectrum provide larger capacity and throughput. Full-duplex communication technology has caused much attention in the past ten years since it can double the spectrum efficiency theoretically. While the main challenge obstructing it promoting into the market is the self-interference problem in a full duplex system. This dissertation focus on the self-interference cancellation (SIC) theories. The RF impairments occurred in the practical full-duplex system will be discussed. Among them, the phase noise and I/Q imbalance are regarded as the bottleneck of the self-interference cancellation and a detailed analyzing will be included in this dissertation. The general self-interference cancellation methods can be divided into passive self-interference cancellation and active self-interference cancellation where the active cancellation can be further divided into digital cancellation, analog cancellation and hybrid cancellation. This dissertation will review the theories of the passive and active self-interference cancellation. For the analog cancellation, two models (quadratic model and affine model) will be explored to handle the I/Q imbalance and phase noise. Both of these two models are based on the blind tuning algorithm which has two procedures: training and optimizing. This dissertation will introduce the development of the algorithm. It contains the computer simulation results as well as the hardware experimental results to prove the validation of the proposed ideas.

Full-Duplex Communications for Future Wireless Networks

Author : Hirley Alves
Publisher : Springer Nature
ISBN 13 : 9811529698
Total Pages : 323 pages
Book Rating : 4.8/5 (115 download)

DOWNLOAD NOW!

Book Synopsis Full-Duplex Communications for Future Wireless Networks by : Hirley Alves

Download or read book Full-Duplex Communications for Future Wireless Networks written by Hirley Alves and published by Springer Nature. This book was released on 2020-04-21 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the multidisciplinary state-of-the-art of full-duplex wireless communications and applications. Moreover, this book contributes with an overview of the fundamentals of full-duplex communications, and introduces the most recent advances in self-interference cancellation from antenna design to digital domain. Moreover, the reader will discover analytical and empirical models to deal with residual self-interference and to assess its effects in various scenarios and applications. Therefore, this is a highly informative and carefully presented book by the leading scientists in the area, providing a comprehensive overview of full-duplex technology from the perspective of various researchers, and research groups worldwide. This book is designed for researchers and professionals working in wireless communications and engineers willing to understand the challenges and solutions full-duplex communication so to implement a full-duplex system.

In-Band Full-Duplex Wireless Systems Handbook

Author : Kenneth E Kolodziej
Publisher : Artech House
ISBN 13 : 1630817902
Total Pages : 440 pages
Book Rating : 4.6/5 (38 download)

DOWNLOAD NOW!

Book Synopsis In-Band Full-Duplex Wireless Systems Handbook by : Kenneth E Kolodziej

Download or read book In-Band Full-Duplex Wireless Systems Handbook written by Kenneth E Kolodziej and published by Artech House. This book was released on 2021-03-31 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many wireless systems could benefit from the ability to transmit and receive on the same frequency at the same time, which is known as In-Band Full-Duplex (IBFD). This technology could lead to enhanced spectral efficiency for future wireless networks, such as fifth-generation New Radio (5G NR) and beyond, and could enable capabilities and applications that were previously considered impossible, such as IBFD with phased array systems. In this exciting new book, experts from industry, academic, and federal research institutions discuss the various approaches that can be taken to suppress the inherent self-interference that is generated in IBFD systems. Both static and adaptive techniques that span across the propagation, analog and digital domains are presented. Details and measured results that encompass high-isolation antenna designs, RF, and photonic cancellation as well as signal processing approaches, which include beamforming and linear/non-linear equalization are detailed. Throughout this book, state-of-the-art IBFD systems that utilize these technologies will be provided as practical examples for various applications. Expert IBFD perspectives from multiple research organizations and companies, which would provide readers with the most accurate state-of-the-art approaches. This is the first book that dives into both the techniques that make IBFD systems possible as well as several different applications that use IBFD technology.

Full Duplex CMOS Transceiver with On-chip Self-interference Cancelation

Author : Seyyed Amir Ayati
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

DOWNLOAD NOW!

Book Synopsis Full Duplex CMOS Transceiver with On-chip Self-interference Cancelation by : Seyyed Amir Ayati

Download or read book Full Duplex CMOS Transceiver with On-chip Self-interference Cancelation written by Seyyed Amir Ayati and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for the higher data rate in the wireless telecommunication is increasing rapidly. Providing higher data rate in cellular telecommunication systems is limited because of the limited physical resources such as telecommunication frequency channels. Besides, interference with the other users and self-interference signal in the receiver are the other challenges in increasing the bandwidth of the wireless telecommunication system. Full duplex wireless communication transmits and receives at the same time and the same frequency which was assumed impossible in the conventional wireless communication systems. Full duplex wireless communication, compared to the conventional wireless communication, doubles the channel efficiency and bandwidth. In addition, full duplex wireless communication system simplifies the reusing of the radio resources in small cells to eliminate the backhaul problem and simplifies the management of the spectrum. Finally, the full duplex telecommunication system reduces the costs of future wireless communication systems. The main challenge in the full duplex wireless is the self-interference signal at the receiver which is very large compared to the receiver noise floor and it degrades the receiver performance significantly. In this dissertation, different techniques for the antenna interface and self-interference cancellation are proposed for the wireless full duplex transceiver. These techniques are designed and implemented on CMOS technology. The measurement results show that the full duplex wireless is possible for the short range and cellular wireless communication systems.

2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Author : IEEE Staff
Publisher :
ISBN 13 : 9781728175874
Total Pages : pages
Book Rating : 4.1/5 (758 download)

DOWNLOAD NOW!

Book Synopsis 2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) by : IEEE Staff

Download or read book 2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) written by IEEE Staff and published by . This book was released on 2021-09-13 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) is one of the premier conferences in the wireless research arena and has a long history of bringing together academia, industry and regulatory bodies Today, it has become one of the IEEE Communication Society s major conferences in wireless communications and networks The topics cover the physical layer (PHY) and fundamentals of wireless communications, medium access control (MAC) and cross layer design, mobile and wireless networks, as well as services, applications, and business

RF Imperfections in High-rate Wireless Systems

Author : Tim Schenk
Publisher : Springer Science & Business Media
ISBN 13 : 1402069030
Total Pages : 323 pages
Book Rating : 4.4/5 (2 download)

DOWNLOAD NOW!

Book Synopsis RF Imperfections in High-rate Wireless Systems by : Tim Schenk

Download or read book RF Imperfections in High-rate Wireless Systems written by Tim Schenk and published by Springer Science & Business Media. This book was released on 2008-01-29 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is one of the first books on the emerging research topic of digital compensation of RF imperfections. The book presents a new multidisciplinary vision on the design of wireless communication systems. In this approach the imperfections of the RF front-ends are accepted and digital signal processing algorithms are designed to suppress their impact on system performance. The book focuses on multiple-antenna orthogonal frequency division multiplexing (MIMO OFDM).

2021 IEEE 6th International Conference on Computer and Communication Systems (ICCCS)

Author : IEEE Staff
Publisher :
ISBN 13 : 9781665429511
Total Pages : pages
Book Rating : 4.4/5 (295 download)

DOWNLOAD NOW!

Book Synopsis 2021 IEEE 6th International Conference on Computer and Communication Systems (ICCCS) by : IEEE Staff

Download or read book 2021 IEEE 6th International Conference on Computer and Communication Systems (ICCCS) written by IEEE Staff and published by . This book was released on 2021-04-23 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ICCCS as an IEEE conference from 2015 2020, which was born in Kanyakumari, India aiming to serve as a premier forum for the presentation of technological advances and research results in the fields of theoretical, experimental, and applied Computer and Communication Systems The second edition ICCCS was held in Kracow, Poland in July of 2017 The third edition was held in Nagoya Institute of Technology, Nagoya, Japan in April of 2018, and the fourth edition was held in Singapore in February of 2019 In 2020, due to the severe impact of COVID 19, ICCCS2020 became the first virtual conference, which created a web platform for all the authors to attend all the sessions and activities Even in such a difficult time, around 250 authors still attended the whole conference full of passion

Technological Innovation for Life Improvement

Author : Luis M. Camarinha-Matos
Publisher : Springer Nature
ISBN 13 : 3030451240
Total Pages : 456 pages
Book Rating : 4.0/5 (34 download)

DOWNLOAD NOW!

Book Synopsis Technological Innovation for Life Improvement by : Luis M. Camarinha-Matos

Download or read book Technological Innovation for Life Improvement written by Luis M. Camarinha-Matos and published by Springer Nature. This book was released on 2020-04-29 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 11th IFIP WG 5.5/SOCOLNET Advanced Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2020, held in Costa de Caparica, Portugal, in July 2020. The 20 full papers and 24 short papers presented were carefully reviewed and selected from 91 submissions. The papers present selected results produced in engineering doctoral programs and focus on technological innovation for industry and service systems. Research results and ongoing work are presented, illustrated and discussed in the following areas: collaborative networks; decisions systems; analysis and synthesis algorithms; communication systems; optimization systems; digital twins and smart manufacturing; power systems; energy control; power transportation; biomedical analysis and diagnosis; and instrumentation in health.

Signal Processing for 5G

Author : Fa-Long Luo
Publisher : John Wiley & Sons
ISBN 13 : 1119116465
Total Pages : 611 pages
Book Rating : 4.1/5 (191 download)

DOWNLOAD NOW!

Book Synopsis Signal Processing for 5G by : Fa-Long Luo

Download or read book Signal Processing for 5G written by Fa-Long Luo and published by John Wiley & Sons. This book was released on 2016-10-17 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and invaluable guide to 5G technology, implementation and practice in one single volume. For all things 5G, this book is a must-read. Signal processing techniques have played the most important role in wireless communications since the second generation of cellular systems. It is anticipated that new techniques employed in 5G wireless networks will not only improve peak service rates significantly, but also enhance capacity, coverage, reliability , low-latency, efficiency, flexibility, compatibility and convergence to meet the increasing demands imposed by applications such as big data, cloud service, machine-to-machine (M2M) and mission-critical communications. This book is a comprehensive and detailed guide to all signal processing techniques employed in 5G wireless networks. Uniquely organized into four categories, New Modulation and Coding, New Spatial Processing, New Spectrum Opportunities and New System-level Enabling Technologies, it covers everything from network architecture, physical-layer (down-link and up-link), protocols and air interface, to cell acquisition, scheduling and rate adaption, access procedures and relaying to spectrum allocations. All technology aspects and major roadmaps of global 5G standard development and deployments are included in the book. Key Features: Offers step-by-step guidance on bringing 5G technology into practice, by applying algorithms and design methodology to real-time circuit implementation, taking into account rapidly growing applications that have multi-standards and multi-systems. Addresses spatial signal processing for 5G, in particular massive multiple-input multiple-output (massive-MIMO), FD-MIMO and 3D-MIMO along with orbital angular momentum multiplexing, 3D beamforming and diversity. Provides detailed algorithms and implementations, and compares all multicarrier modulation and multiple access schemes that offer superior data transmission performance including FBMC, GFDM, F-OFDM, UFMC, SEFDM, FTN, MUSA, SCMA and NOMA. Demonstrates the translation of signal processing theories into practical solutions for new spectrum opportunities in terms of millimeter wave, full-duplex transmission and license assisted access. Presents well-designed implementation examples, from individual function block to system level for effective and accurate learning. Covers signal processing aspects of emerging system and network architectures, including ultra-dense networks (UDN), software-defined networks (SDN), device-to-device (D2D) communications and cloud radio access network (C-RAN).

Signal Processing Techniques for Power Efficient Wireless Communication Systems

Author : Fernando Gregorio
Publisher : Springer Nature
ISBN 13 : 3030324370
Total Pages : 269 pages
Book Rating : 4.0/5 (33 download)

DOWNLOAD NOW!

Book Synopsis Signal Processing Techniques for Power Efficient Wireless Communication Systems by : Fernando Gregorio

Download or read book Signal Processing Techniques for Power Efficient Wireless Communication Systems written by Fernando Gregorio and published by Springer Nature. This book was released on 2019-11-23 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a synthesis of the research carried out in the Laboratory of Signal Processing and Communications (LaPSyC), CONICET, Universidad Nacional del Sur, Argentina, since 2003. It presents models and techniques widely used by the signal processing community, focusing on low-complexity methodologies that are scalable to different applications. It also highlights measures of the performance and impact of each compensation technique. The book is divided into three parts: 1) basic models 2) compensation techniques and 3) applications in advanced technologies. The first part addresses basic architectures of transceivers, their component blocks and modulation techniques. It also describes the performance to be taken into account, regardless of the distortions that need to be compensated. In the second part, several schemes of compensation and/or reduction of imperfections are explored, including linearization of power amplifiers, compensation of the characteristics of analog-to- digital converters and CFO compensation for OFDM modulation. The third and last part demonstrates the use of some of these techniques in modern wireless-communication systems, such as full-duplex transmission, massive MIMO schemes and Internet of Things applications.

Integrated Wideband Self-interference Cancellation Techniques for FDD and Full-duplex Wireless Communication

Author : Tong Zhang
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (1 download)

DOWNLOAD NOW!

Book Synopsis Integrated Wideband Self-interference Cancellation Techniques for FDD and Full-duplex Wireless Communication by : Tong Zhang

Download or read book Integrated Wideband Self-interference Cancellation Techniques for FDD and Full-duplex Wireless Communication written by Tong Zhang and published by . This book was released on 2017 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Self Interferometry

Author : Dinesh Bharadia
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (945 download)

DOWNLOAD NOW!

Book Synopsis Self Interferometry by : Dinesh Bharadia

Download or read book Self Interferometry written by Dinesh Bharadia and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless radios are typically half-duplex radios, and hence, the current wireless networks are Time Division Duplex(TDD) or Frequency Division Duplex (FDD). Full-duplex for wireless communications is considered impossible i.e. radios cannot transmit and receive at the same frequency at the same time. If we could achieve full duplex radios we won't need TDD or FDD strategy, we could potentially double the spectral efficiency. The fundamental challenge in achieving full duplex radios, when a radio is transmitting while simultaneously trying to receive (hear another radio) on the same frequency, it cannot. It's own transmission acts as a very strong self-interference. In this dissertation, we present the design, prototype and implementation of full duplex mimo radios. In particular, we built the first single antenna per chain full-duplex MIMO radios for 2.4 GHz WiFi-PHY i.e. to achieve an m-chain MIMO transceiver we need only m antenna. We design novel cancellation algorithms and circuits that reduce all self-interference to the noise floor and enable full-duplex MIMO PHY with almost no loss. The cancellation algorithms designed for full duplex themselves are of independent interest and apply to many other interference problems in wireless. We exploit this to build a full duplex relay which is the first one to provide both range extension and increase the capacity, is oblivious to ongoing transmission the source and the destination don't even realise that relay exist. Further, we build on top of the cancellation BackFi; a system that provides high throughput connectivity using backscatter to IoT devices at a very lower power. BackFi backscatters all ubiquitous ongoing WiFi signals to provide connectivity. Thus, providing connectivity without using extra spectrum just leveraging full duplex link. The cancellation, in essence, cancels all the reflections from the environment of self transmitted signal, inferring the reflection from cancellation provides us information about the environment. Towards the end, we abstract this information with a platform of Self-Interferometry, which provides with a unique way of looking at environment using wireless signals instead of light. Thus building a camera with wireless radios.

Weighted Sum-Rate Maximization in Wireless Networks

Author : Pradeep Chathuranga Weeraddana
Publisher : Now Pub
ISBN 13 : 9781601985828
Total Pages : 174 pages
Book Rating : 4.9/5 (858 download)

DOWNLOAD NOW!

Book Synopsis Weighted Sum-Rate Maximization in Wireless Networks by : Pradeep Chathuranga Weeraddana

Download or read book Weighted Sum-Rate Maximization in Wireless Networks written by Pradeep Chathuranga Weeraddana and published by Now Pub. This book was released on 2012-09-04 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Weighted Sum-Rate Maximization in Wireless Networks: A Review, a cohesive discussion of the existing solution methods associated with the WSRMax problem, including global, fast local, as well as decentralized methods, is presented.