Download or read book Design of High speed Adaptive Parallel Multi level Decision Feedback Equalizer written by Yihai Xiang and published by . This book was released on 1997 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-level decision feedback equalization (MDFE) is an effective technique to remove inter-symbol interference (ISI) from disk readback signals, which uses the simple architecture of decision feedback equalization. Parallelism which doubles the symbol rate can be realized by setting the first tap of the feedback filter to zero. A mixed-signal implementation has been chosen for the parallel MDFE, in which coefficients for the 9-tap feedback filter are adapted in the digital domain by 10-bit up/ down counters; 6-bit current mode D/A converters are used to convert digital coefficients to differential current signals which are summed with the forward equalizer (FE) output, and a flash A/D is used to make decisions and generate error signals for adaptation. In this thesis, a description of the parallel structure and the adaptation algorithm are presented with behavioral level verification. The circuit design and layout were carried out in HP 1.2um n-well CMOS process. The design of the high-speed counter and the current-mode D/A are discussed. HSPICE simulations show that a symbol rate of 100Mb/s for the feedback equalizer is readily achieved.
Download or read book Dynamic Power saving Adaptive Decision Feedback Equalizer Design for High speed Communication Systems written by 王博民 and published by . This book was released on 2003 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Decision Feedback Equalization With Continuous time Infinite Impulse Response Filters written by Shayan Shahramian and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In high-speed (10+Gb/s) chip-to-chip links, the primary impairments to signal integrity are noise, crosstalk, and a smooth tail in the pulse response resulting in inter-symbol interference (ISI) sometimes spanning more than 10 unit intervals (UIs). Although often simple in their implementation, continuous time linear equalizers amplify high-frequency noise and crosstalk and consume extra power. A conventional discrete-time (DT) decision feedback equalizer (DFE) is well-suited and power efficient for channels with a few dominant post-cursor ISI terms, however, the power can become prohibitive for channels with many post-cursor ISI terms. Infinite impulse response (IIR) DFEs can equalize post-cursor ISI persisting 10 or more UIs while consuming low-power comparable to just one DT tap. DFE architectures with varying numbers of DT and IIR taps are compared for use in typical wireline channels, and it is found that 2 IIR taps can offer an excellent compromise between power consumption and performance. However, an IIR DFEâ s performance degrades significantly as the feedback loop delay increases. Fortunately, adding a single DT tap can eliminate the degradation. The first ever hybrid DFE combining 1 DT and multiple (2) IIR taps is presented equalizing 24dB loss at half the bitrate while consuming 4.1mW at 10Gb/s. A novel edge based adaptation algorithm is also presented for DT DFEs which converges faster than previous algorithms while using the same high-speed circuitry and signals required for clock recovery. The edge based algorithm is extended to work for a 1 DT + 1 IIR DFE. The 1 DT + 1 IIR DFE along with integrated clock recovery and adaptation is demonstrated in 28nm FD-SOI CMOS. At 16Gb/s with a 30dB-loss channel, a BER below 10â 12 is measured over a 0.3UI timing window. The novel edge-based algorithm adapts both IIR and discrete-tap equalizer coefficients using the same high-speed circuitry and signals required for clock recovery. The adaptive DFE converges within 5us and is robust in the presence of poorly-conditioned data.
Download or read book Design of 20Gbps Adaptive Linear Equalizer and Decision Feedback Equalizer written by 陳冠宇 and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Area Efficient 4Gb s 3 tap Decision Feedback Equalizer with Current Integrating Summer written by Chen Zhang and published by . This book was released on 2016 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the requirement of wire line applications increases, the demand for higher data transmission bandwidth is continuously exploding. While the on-chip speed has led to a growing interest in developing faster I/O for chip-to-chip and backplane communication, bandwidth limitation has not shown dramatic improvement over the years. Consequently, it presents great challenges to achieving multi-gigabits per second signaling rate. The inherent undesirable electrical characteristics of channel and issues induced by neighboring channels such as crosstalk severely degrade the transmitted signal. According to prior research works, Intersymbol Interference (ISI) is the dominant noise for high-speed backplane transmission, which makes one data bit broaden to greater than one Unit Interval (UI). High possibility of error is shown in data detecting at receiver due to the interference between the current data bit and the accumulated "tail"s which come from its preceding bits. Nowadays, there are number of equalization methods that are applied to both transmitter and receiver to eliminate the effect of ISI. Among these equalizers, Decision Feedback Equalizer (DFE) is the most widely-used discrete-time equalizer, which stores and feeds back the decisions it has made for the previous bits and subtracts the ISI of these stored bits from the current signal. The DFE shows a good advantage that it reduces signal distortion without amplifying noise or crosstalk. In this research, an area efficient decision feedback equalizer with a new current-integrating summer in standard CMOS 180nm technology node is designed and simulated in Cadence. Since the feedback timing constraint for the first tap is one of the greatest challenge in DFE design, first-tap speculative architecture is commonly used to relax this timing margin. For conventional first-tap speculative half-rate DFE, four parallel paths have exactly the same hardware and the main part of summer in two speculative paths is redundant. In order to optimize the structure, a new current-integrating summer with switched-capacitors is proposed. Unlike the conventional one, the proposed summer separates the first speculative tap which allows two parallel paths for speculation to be driven by a single summer instead of two. The proposed DFE consumes 17.4mW with 1.8V supply voltage when equalizing 4Gb/s data passed over a channel with 28dB loss at 2GHz. Simulation result shows that a horizontal 40% eye opening at BER less than 10^(-6) is derived.
Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design of a Decision Feedback Equalizer Using Adaptive Lattice Filters written by Aristos Orpheas Dimitriou and published by . This book was released on 1990 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pipelined Adaptive Digital Filters written by Naresh R. Shanbhag and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive filtering is commonly used in many communication applications including speech and video predictive coding, mobile radio, ISDN subscriber loops, and multimedia systems. Existing adaptive filtering topologies are non-concurrent and cannot be pipelined. Pipelined Adaptive Digital Filters presents new pipelined topologies which are useful in reducing area and power and in increasing speed. If the adaptive filter portion of a system suffers from a power-speed-area bottleneck, a solution is provided. Pipelined Adaptive Digital Filters is required reading for all users of adaptive digital filtering algorithms. Algorithm, application and integrated circuit chip designers can learn how their algorithms can be tailored and implemented with lower area and power consumption and with higher speed. The relaxed look-ahead techniques are used to design families of new topologies for many adaptive filtering applications including least mean square and lattice adaptive filters, adaptive differential pulse code modulation coders, adaptive differential vector quantizers, adaptive decision feedback equalizers and adaptive Kalman filters. Those who use adaptive filtering in communications, signal and image processing algorithms can learn the basis of relaxed look-ahead pipelining and can use their own relaxations to design pipelined topologies suitable for their applications. Pipelined Adaptive Digital Filters is especially useful to designers of communications, speech, and video applications who deal with adaptive filtering, those involved with design of modems, wireless systems, subscriber loops, beam formers, and system identification applications. This book can also be used as a text for advanced courses on the topic.
Download or read book VLSI Implementations for Image Communications written by P. Pirsch and published by Elsevier. This book was released on 2014-06-28 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past few years have seen a rapid growth in image processing and image communication technologies. New video services and multimedia applications are continuously being designed. Essential for all these applications are image and video compression techniques. The purpose of this book is to report on recent advances in VLSI architectures and their implementation for video signal processing applications with emphasis on video coding for bit rate reduction. Efficient VLSI implementation for video signal processing spans a broad range of disciplines involving algorithms, architectures, circuits, and systems. Recent progress in VLSI architectures and implementations has resulted in the reduction in cost and size of video signal processing equipment and has made video applications more practical. The topics covered in this volume demonstrate the increasingly interdisciplinary nature of VLSI implementation of video signal processing applications, involving interactions between algorithms, VLSI architectures, circuit techniques, semiconductor technologies and CAD for microelectronics.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Index to IEEE Publications written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1998 with total page 1234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues for 1973- cover the entire IEEE technical literature.
Download or read book EDN written by and published by . This book was released on 1990 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Circular written by and published by . This book was released on 1994 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Integrated Circuits for Optical Communications written by Behzad Razavi and published by John Wiley & Sons. This book was released on 2012-09-14 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only book on integrated circuits for optical communications that fully covers High-Speed IOs, PLLs, CDRs, and transceiver design including optical communication The increasing demand for high-speed transport of data has revitalized optical communications, leading to extensive work on high-speed device and circuit design. With the proliferation of the Internet and the rise in the speed of microprocessors and memories, the transport of data continues to be the bottleneck, motivating work on faster communication channels. Design of Integrated Circuits for Optical Communications, Second Edition deals with the design of high-speed integrated circuits for optical communication transceivers. Building upon a detailed understanding of optical devices, the book describes the analysis and design of critical building blocks, such as transimpedance and limiting amplifiers, laser drivers, phase-locked loops, oscillators, clock and data recovery circuits, and multiplexers. The Second Edition of this bestselling textbook has been fully updated with: A tutorial treatment of broadband circuits for both students and engineers New and unique information dealing with clock and data recovery circuits and multiplexers A chapter dedicated to burst-mode optical communications A detailed study of new circuit developments for optical transceivers An examination of recent implementations in CMOS technology This text is ideal for senior graduate students and engineers involved in high-speed circuit design for optical communications, as well as the more general field of wireline communications.
Download or read book Conference Record written by and published by . This book was released on 1991 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The IEEE Asia Pacific Conference on ASICs written by and published by . This book was released on 2000 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
