Download or read book Integrated Tunable Duplexer in CMOS Technology for Multiband Cellular Transceivers written by Sherif H. Abdelhalem and published by . This book was released on 2013 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frequency division duplex (FDD) cellular standards, like WCDMA and LTE, require the simultaneous operation of the transmitter and receiver while sharing the same antenna. A duplexer, currently implemented as two highly selective off-chip SAW filters separates the transmit and receive signals. A high isolation is required to avoid saturating the receiver and keep its noise and linearity requirements feasible. The need for high-Q resonators to implement these filters prohibits duplexer integration in a CMOS process. For each band of a modern multi-band transceiver, an off-chip duplexer is required. With over forty bands currently envisioned for mobile applications, the system cost and complexity rises significantly. Replacing the bank of off-chip duplexers with a single integrated tunable duplexer would enable a fully integrated and reconfigurable multiband transceiver. In this dissertation, the performance of hybrid transformer based integrated duplexer was significantly improved, making it suitable for reliable multiband operation. A hybrid transformer relies on electrical balance rather than frequency selectivity to achieve isolation, making duplexer integration in a CMOS process that lacks high-Q passives possible. Prior demonstrations of integrated hybrid transformer duplexers suffered from high insertion loss, poor common-mode isolation and isolation sensitivity to antenna mismatch. Novel solutions were reached in this research to solve most of these issues. Power recovery by using an RF-DC converter can effectively reduce the loss in the duplexer. A discrete prototype that achieves 60% power recycling efficiency with constant input impedance over wide dynamic range was demonstrated. A differential implementation of the hybrid transformer allows for both high differential and common-mode isolation. Implemented in a 90nm CMOS process, it maintains more than 60 dB of differential to common-mode isolation. And finally, an antenna impedance tracking loop was demonstrated to track any antenna impedance variation and maintain high isolation. Together with a novel high power balance network, that allows high isolation in both the transmit and receive bands, this 65nm CMOS chip achieves an isolation of more than 50 dB in the transmit and receive bands, with an antenna VSWR within 2:1. This work is the first implementation of a CMOS integrated, high-power and antenna mismatch tolerant duplexer.

Download or read book Distributed CMOS Bidirectional Amplifiers written by Ziad El-Khatib and published by Springer Science & Business Media. This book was released on 2012-05-02 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes methods to design distributed amplifiers useful for performing circuit functions such as duplexing, paraphrase amplification, phase shifting power splitting and power combiner applications. A CMOS bidirectional distributed amplifier is presented that combines for the first time device-level with circuit-level linearization, suppressing the third-order intermodulation distortion. It is implemented in 0.13um RF CMOS technology for use in highly-linear, low-cost UWB Radio-over-Fiber communication systems.

Download or read book Design of Integrated Full Duplex Wireless Transceivers written by Sameet Ramakrishnan and published by . This book was released on 2016 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for mobile data traffic is projected to exceed 30 exabytes per month in 2020, representing an over 100x increase since 2010. Prior generations of cellular deployments have serviced increased demand largely through use of more bandwidth - from 200KHz in GSM, to now 100MHz in CA-LTE. This method of scaling is closed, as low frequency spectrum has crowded and saturated. A proposed technique to enhance spectrum access in 5G deployments is agile full-duplex (FD) transceivers, which can transmit and receive at overlapped frequencies, or tune to arbitrarily spaced transmit/receive(TX/RX) frequency division duplexed (FDD) channels, to make use of available spectrum. The key problem in such a system is mitigating the interference the system's own transmitter creates for its receiver during simultaneous operation. Current implementations mitigate TX to RX interference at the antenna interface using off-chip, fixed-frequency duplexers, limiting a device's spectrum access to a handful of pre-defined, widely separated TX/RX band combinations. Accordingly, a universal mobile device tunable across global carrier band combinations does not exist. This work develops a transceiver architecture enabling simultaneous transmission and reception on a single single shared antenna, over a wide frequency tuning range, for FD/FDD systems. The architecture is enabled by an active TX replica which cancels interference at the RX input, a highly linear passive-mixer first receiver design based on class-AB transconductors which operates linearly in the presence of residual TX interference, and digital adaptation techniques which match the interference over time-varying operating conditions. Analysis is presented for the system's fundamental performance bounds in power and sensitivity, leading to noise mitigation techniques which minimize receiver degradation in the presence of the cancellation circuits. The analysis is validated by two chip prototypes, which demonstrate over $>$50dB cancellation of a +16dBm peak 20MHz TX signal, from 1GHz to 2GHz, up to an antenna VSWR of 5:1. This work demonstrates the potential for a fully integrated, frequency-tunable FD/FDD transceiver system, which could ultimately double existing mobile network capacity, and enable a universal duplexer-less radio.

Download or read book RF System Design of Transceivers for Wireless Communications written by Qizheng Gu and published by Springer Science & Business Media. This book was released on 2006-05-03 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is for RF Engineers and, in particular, those engineers focusing mostly on RF systems and RFIC design. The author develops systematic methods for RF systems design, complete with a comprehensive set of design formulas. Its focus on mobile station transmitter and receiver system design also applies to transceiver design of other wireless systems such as WLAN. This comprehensive reference work covers a wide range of topics from general principles of communication theory, as it applies to digital radio designs to specific examples on implementing multimode mobile systems.

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.

Download or read book Millimeter Wave Circuits for 5G and Radar written by Gernot Hueber and published by Cambridge University Press. This book was released on 2019-06-20 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the concepts, architectures, components, tools, and techniques needed to design millimeter-wave circuits for current and emerging wireless system applications. Focusing on applications in 5G, connectivity, radar, and more, leading experts in radio frequency integrated circuit (RFIC) design provide a comprehensive treatment of cutting-edge physical-layer technologies for radio frequency (RF) transceivers - specifically RF, analog, mixed-signal, and digital circuits and architectures. The full design chain is covered, from system design requirements through to building blocks, transceivers, and process technology. Gain insight into the key novelties of 5G through authoritative chapters on massive MIMO and phased arrays, and learn about the very latest technology developments, such as FinFET logic process technology for RF and millimeter-wave applications. This is an essential reading and an excellent reference for high-frequency circuit designers in both academia and industry.

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.

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.

Download or read book White Space Communication Technologies written by Nuno Borges Carvalho and published by Cambridge University Press. This book was released on 2014-10-09 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to describe RF hardware design for white space applications, including both analog and digital approaches.

Download or read book Science Abstracts written by and published by . This book was released on 1993 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book mm Wave Silicon Technology written by Ali M. Niknejad and published by Springer Science & Business Media. This book was released on 2008-01-03 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles and presents the research results from the past five years in mm-wave Silicon circuits. This area has received a great deal of interest from the research community including several university and research groups. The book covers device modeling, circuit building blocks, phased array systems, and antennas and packaging. It focuses on the techniques that uniquely take advantage of the scale and integration offered by silicon based technologies.

Download or read book 2021 IEEE Radio Frequency Integrated Circuits Symposium RFIC written by IEEE Staff and published by . This book was released on 2021-06-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: RFIC is the premier IC Conference focused on the latest developments in RF Microwave, and Millimeter Wave Integrated Circuit Technology and Innovation

Download or read book The Design of CMOS Radio Frequency Integrated Circuits written by Thomas H. Lee and published by Cambridge University Press. This book was released on 2004 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, first published in 2004, is an expanded and revised edition of Tom Lee's acclaimed RFIC text.

Download or read book Radio Frequency Integrated Circuits and Systems written by Hooman Darabi and published by Cambridge University Press. This book was released on 2020-03-12 with total page 783 pages. Available in PDF, EPUB and Kindle. Book excerpt: Equips students with essential industry-relevant knowledge through in-depth explanations, practical applications, examples, and exercises.

Download or read book Circuit Design for RF Transceivers written by Domine Leenaerts and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applicable for bookstore catalogue

Download or read book Radio Design in Nanometer Technologies written by Mohammed Ismail and published by Springer. This book was released on 2010-10-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio Design in Nanometer Technologies is the first volume that looks at the integrated radio design problem as a "piece of a big puzzle", namely the entire chipset or single chip that builds an entire wireless system. This is the only way to successfully design radios to meet the stringent demands of today’s increasingly complex wireless systems.

Download or read book Wireless Communications written by Andrea Goldsmith and published by Cambridge University Press. This book was released on 2005-08-08 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless technology is a truly revolutionary paradigm shift, enabling multimedia communications between people and devices from any location. It also underpins exciting applications such as sensor networks, smart homes, telemedicine, and automated highways. This book provides a comprehensive introduction to the underlying theory, design techniques and analytical tools of wireless communications, focusing primarily on the core principles of wireless system design. The book begins with an overview of wireless systems and standards. The characteristics of the wireless channel are then described, including their fundamental capacity limits. Various modulation, coding, and signal processing schemes are then discussed in detail, including state-of-the-art adaptive modulation, multicarrier, spread spectrum, and multiple antenna techniques. The concluding chapters deal with multiuser communications, cellular system design, and ad-hoc network design. Design insights and tradeoffs are emphasized throughout the book. It contains many worked examples, over 200 figures, almost 300 homework exercises, over 700 references, and is an ideal textbook for students.