Download or read book Threshold Improvement in F M Systems by the Use of Negative Frequency feedback written by Frank Altamond Lawton Subaran and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Threshold Improvement in F M Systems by the Use of Negative Frequency feedbacks written by F. A. L. Subaran and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Project Echo FM Demodulators with Negative Feedback written by Clyde L. Ruthroff and published by . This book was released on 1961 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of FM Threshold Extension Techniques written by G. D. Arndt and published by . This book was released on 1972 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations into the FM threshold phenomenon have resulted in the development of several signal processing techniques that can be implemented at the output of any FM demodulator, including phase lock loop and FM feedback demodulators, to provide improved system performance. These techniques are based on the distinguishing characteristics of the demodulator output noise below threshold. Performance improvement and threshold extension are achieved by operating on the demodulator output signal and noise such that the threshold noise impulses are eliminated. The characteristics of three postdetection threshold extension techniques are evaluated with respect to the ability of such techniques to improve the performance of a phase lock loop demodulator. These techniques include impulse-noise elimination, signal correlation for the detection of impulse noise, and delta modulation signal processing. Experimental results from signal-to-noise ratio data and bit error rate data indicate that a 2- to 3-decibel threshold extension is readily achievable by using the various techniques. This threshold improvement is in addition to the threshold extension that is usually achieved through the use of a phase lock loop demodulator.
Download or read book Communication Systems and Techniques written by Mischa Schwartz and published by John Wiley & Sons. This book was released on 1995-11-22 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introductory, graduate-level look at modern communications in general and radio communications in particular. This seminal presentation of the applications of communication theory to signal and receiver design brings you valuable insights into the fundamental concepts underlying today's communications systems, especially wireless communications. Coverage includes: AM, FM Phase Modulation, PCM, fading, and diversity receivers. This is a classic reissue of a book published by McGraw Hill in 1966.
Download or read book Phase Locked and Frequency Feedback Systems written by Jacob Klapper and published by Elsevier. This book was released on 2012-12-02 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase-Locked and Frequency-Feedback Systems: Principles and Techniques presents the operating principles and methods of design of phase-locked and frequency-feedback systems. This book is divided into 10 chapters that provide step-by-step design procedures and graphical aids, with illustrations bearing on real problems experienced in these systems. This work specifically tackles the application of these systems as FM demodulators with lowered thresholds. Chapters 1 and 2 deal briefly with the elements of linear systems, feedback theory, and noise, providing the minimum background for the material presented in the remainder of the text. Chapter 3 describes the characteristics of the major components that comprise the loops and the performance of the conventional and multi-loop FM demodulators. Chapters 4 to 7 present the basic describing equations and design for the FM feedback (FMFB) and phase-locked loop (PLL). These chapters further illustrate step-by-step design procedures with performance characteristics for low-threshold angle demodulation using typical design examples. Chapter 8 highlights the design principles, which are extended to the design of advanced demodulators featuring demodulation thresholds lower than those of the simple PLL or FMFB. Chapter 9 focuses on digital FM demodulation and PLL applications other than FM demodulation. Lastly, Chapter 10 presents the methods of testing and evaluating loop performance. Undergraduate and graduate level students, as well as practicing engineers, will find this book invaluable.
Download or read book An Analysis and Synthesis Procedure for Feedbak Fm Systems Part a Conventional Fm Systems Part B Feedback Fm Systems written by Andrzej Wojnar and published by . This book was released on 1963 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of frequency-compressive feedback FM systems was made, with emphasis placed on threshold behavior. A recent evaluation of the impulsive noise component by Rice is used. It is shown that this excess-noise component predominates in the threshold region of most conventional FM systems. A new analytical expression (which agrees with experimental evidence) has been found for the location of the noise threshold. Two possible mechanisms causing noise threshold in a feedback FM system are examined. It is shown that the feedback threshold results in an abrupt breakdown of system performance, and therefore should not be approached too closely. It is therefore recommended that feedback systems by designed with the conventional threshold predominant. In this case, the analysis of feedback systems approaches that of conventional systems. Some modified formulas for feedback FM system performance at threshold are proposed; new bounds on the performance of the systems with optimum feedback filters are derived. The maximum obtainable threshold power-bandwidth trade-off implied thereby is also determined. (Author).
Download or read book NASA Technical Note written by and published by . This book was released on 1962 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Fluctuations and Noise in Parametric Processes written by A. G. Fox and published by . This book was released on 1962 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Summary written by Jet Propulsion Laboratory (U.S.) and published by . This book was released on 1961 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Threshold Improvement in F M Detection by Use of Feedback written by Alan Robert Hamilton and published by . This book was released on 1961 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High performance Frequency demodulation Systems written by Michael Hendrikus Laurentius Kouwenhoven and published by . This book was released on 1998 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Telstar I written by Goddard Space Flight Center and published by . This book was released on 1963 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 1962 National Telemetering Conference written by and published by . This book was released on 1962 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Error Rates in Multiple FSK Systems and the Signal to noise Characteristics of FM and PCM FS Systems written by Hiroshi Akima and published by . This book was released on 1963 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Institution of Telecommunication Engineers written by Institution of Telecommunication Engineers (India) and published by . This book was released on 1969 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress Report written by Jet Propulsion Laboratory (U.S.) and published by . This book was released on 1959 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
