Author: Michael Quynh LePublisher:
ISBN:
Category :
Languages : en
Pages : 316
Book Description
Adaptive Noise-predictive Decision-feedback Equalization
Author: Michael Quynh LeAdaptive Decision Feedback Equalization With Continuous-time Infinite Impulse Response Filters
Author: Shayan ShahramianPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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.
Precoding and Signal Shaping for Digital Transmission
Author: Robert F. H. FischerPublisher: John Wiley & Sons
ISBN: 0471727725
Category : Technology & Engineering
Languages : en
Pages : 506
Book Description
Eine praktisch orientierte, schrittweise Einführung in die Grundlagen der Präcodierung und der Signalformung, wie es sie bisher noch nicht gab! - mit steigender Datenmenge in Kommunikationsnetzwerken wird die dispersive Natur der Kanäle (Kupfer, Faseroptik oder drahtlos) für die Qualität des Signals immer bedeutender - Algorithmen zur Präcodierung und Signalformung spielen eine zunehmende Rolle in der modernen Telekommunikation - ihre Implementation erlaubt eine effizientere Nutzung der Bandbreite; so kann ein gegebenes Netzwerk eine größere Datenmenge oder eine größere Anzahl von Benutzern unterstützen, ohne physikalisch erweitert zu werden - der Band illustriert die Theorie mit Beispielen aus der drahtgebundenen und drahtlosen Kommunikation
Adaptive Techniques for Mixed Signal System on Chip
Author: Ayman FayedPublisher: Springer Science & Business Media
ISBN: 0387321551
Category : Technology & Engineering
Languages : en
Pages : 186
Book Description
This book is devoted to the subject of adaptive techniques for smart analog and mixed signal design whereby fully functional first-pass silicon is achievable. To our knowledge, this is the first book devoted to this subject. The techniques described should lead to quantum improvement in design productivity of complex analog and mixed signal systems while significantly cutting the spiraling costs of product development in emerging nanometer technologies.
Proceedings
Author: Algorithms for Communications Systems and their Applications
Author: Nevio BenvenutoPublisher: John Wiley & Sons
ISBN: 9780470843895
Category : Technology & Engineering
Languages : en
Pages : 1324
Book Description
This volume presents the logical arithmetical or computational procedures within communications systems that will ensure the solution to various problems. The authors comprehensively introduce the theoretical elements that are at the basis of the field of algorithms for communications systems. Various applications of these algorithms are then illustrated with particular attention to wired and wireless network access technologies. * Provides a complete treatment of algorithms for communications systems, rarely presented together * Introduces the theoretical background to digital communications and signal processing * Features numerous applications including advanced wireless modems and echo cancellation techniques * Includes useful reference lists at the end of each chapter Graduate students in the fields of Telecommunications and Electrical Engineering Researchers and Professionals in the area of Digital Communications, Signal Processing and Computer Engineering will find this book invaluable.
Adaptive Filtering
Author: Lino Garcia MoralesPublisher: IntechOpen
ISBN: 9789533071589
Category : Computers
Languages : en
Pages : 412
Book Description
Adaptive filtering is useful in any application where the signals or the modeled system vary over time. The configuration of the system and, in particular, the position where the adaptive processor is placed generate different areas or application fields such as prediction, system identification and modeling, equalization, cancellation of interference, etc., which are very important in many disciplines such as control systems, communications, signal processing, acoustics, voice, sound and image, etc. The book consists of noise and echo cancellation, medical applications, communications systems and others hardly joined by their heterogeneity. Each application is a case study with rigor that shows weakness/strength of the method used, assesses its suitability and suggests new forms and areas of use. The problems are becoming increasingly complex and applications must be adapted to solve them. The adaptive filters have proven to be useful in these environments of multiple input/output, variant-time behaviors, and long and complex transfer functions effectively, but fundamentally they still have to evolve. This book is a demonstration of this and a small illustration of everything that is to come.
Conference Record
Author: CMOS Continuous-Time Adaptive Equalizers for High-Speed Serial Links
Author: Cecilia Gimeno GascaPublisher: Springer
ISBN: 3319105639
Category : Technology & Engineering
Languages : en
Pages : 164
Book Description
This book introduces readers to the design of adaptive equalization solutions integrated in standard CMOS technology for high-speed serial links. Since continuous-time equalizers offer various advantages as an alternative to discrete-time equalizers at multi-gigabit rates, this book provides a detailed description of continuous-time adaptive equalizers design - both at transistor and system levels-, their main characteristics and performances. The authors begin with a complete review and analysis of the state of the art of equalizers for wireline applications, describing why they are necessary, their types, and their main applications. Next, theoretical fundamentals of continuous-time adaptive equalizers are explored. Then, new structures are proposed to implement the different building blocks of the adaptive equalizer: line equalizer, loop-filters, power comparator, etc. The authors demonstrate the design of a complete low-power, low-voltage, high-speed, continuous-time adaptive equalizer. Finally, a cost-effective CMOS receiver which includes the proposed continuous-time adaptive equalizer is designed for 1.25 Gb/s optical communications through 50-m length, 1-mm diameter plastic optical fiber (POF).
Fundamentals of DSL Technology
Author: Philip GoldenPublisher: CRC Press
ISBN: 0203317491
Category : Computers
Languages : en
Pages : 472
Book Description
The DSL arena is expanding rapidly, making it highly unlikely that any single author can adequately address the breadth and depth of the subject. Responding to the demand of designers worldwide, Fundamentals of DSL Technology combines the strengths of the field's most renowned DSL experts, providing a foundation of all aspects of DSL system design.