Download or read book Demodulation of Angle modulated Telemetry Signals Volume Ii Review of Demodulation Methods written by J. J Spilker (Jr) and published by . This book was released on 1966 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents a review of the various methods available for the demodulation of the angle-modulated sinusoids. Three major sections are contained in this report: Demodulation of Analog Angle-Modulated Signals (Conventional FM Discriminators) (Phase-Locked Demodulation), Special Feedback and Feedforward Demodulators for Analog Modulated Signals, and Digital Signalling. In Section 2 conventional discriminator detection is discussed along with various forms of phase-locked demodulation. These areas have received the greatest attention in the literature and consequently are given the greatestspace in this report. Section 3 describes a wide variety of special feedback and feedforward demodulation methods for angle-modulated signals. The frequency-feedback demodulator is considered here along with the numerous forms of 'modified' phase-locked loops. Feedforward demodulation methods are also discussed. Nonlinear post-detection filtering, described in greater detail in Vol. I (AD-639 787), is reviewed here for completeness. Various binary and M-ary methods of digital signalling are reviewed in Section 4. Optimum and near-optimum detection methods are described for: PCM-FM, FSK, PSK, DPSK, MPSK, M-ary coded PSK, and MFSK. (Author).

Download or read book Demodulation of Angle modulated Telemetry Signals Volume I Advanced Demodulation Techniques written by D. C. Luby and published by . This book was released on 1966 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: A great deal of study has been given to the demodulation of FM and PM modulated signals. This report is the first of a two-volume series which reviews and contributes to the body of information on this subject. In this volume, three new techniques are discussed which are useful for the demodulation of angle-modulated signals. The three techniques analyzed are: (1) nonlinear post-detection filtering, (2) subharmonic phase-locked loop, and (3) feedforward deviation compression demodulator. The performance of these techniques is analyzed both with respect to noise effects and distortion. Emphasis is given to telemetry signal processing. Several computer (digital) programs were generated to carry out these investigations and nonlinear post-detection filters were simulated on an analog computer. In addition to the three new techniques studied in this report, several other topics are treated. One important topic is a precise analysis of the distortion in phase-locked loops. The second is a review of the effects of predetection recording on telemetry signals. (Author).

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966 with total page 1086 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1966-11 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 U S Government Research and Development Reports written by and published by . This book was released on 1966-10 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Advanced Techniques for the Demodulation of Angle modulated Signals Internal Research Account No 86 090 written by Cornell Aeronautical Laboratory and published by . This book was released on 1965 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1966 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1977 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1966-11 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Demodulation Techniques for Continuous Phase Modulated Signals written by Rachel E. Balsam and published by . This book was released on 2004 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Techniques for Eliminating Baseband Voice Interference with Telemetry for the Apollo Communication System written by G. Dickey Arndt and published by . This book was released on 1970 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excessive telemetry error rates caused by baseband voice interference occur in several modes of the Apollo communication system. Demodulation, using essentially nonlinear quadrature phase detection, causes voice terms to appear in the telemetry spectrum. In this report, two methods which effectively linearize the demodulation process are used to reduce the voice interference. One method uses a negative feedback loop incorporated around the present nonlinear phase detector. The other method uses a frequency-modulation demodulator preceded by a composite filter containing three band-pass filters in parallel. The theoretical development, construction, and testing of both methods are presented. Significant improvement in telemetry performance is obtained. Results show that voice interference to both the 1.6- and 51.2-kbps telemetry data is negligible for all spacecraft/ground-station conditions when using either of the two methods. It is recommended that the negative-feedback-loop method be implemented in the Manned Space Flight Network ground stations as a result of its relative simplicity and superior performance.

Download or read book A Nonlinear Analysis of Angle Demodulation written by Francis Shosaku Nakamoto and published by . This book was released on 1972 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The angle-demodulation problem is investigated from the viewpoint of nonlinear filtering theory. The mean square error criterion and state-variable representation of Kushner's classical nonlinear approach are adopted. The relationship between the optimum nonlinear filter and certain decoupled implementations is shown. The decoupled implementations are subsequently analyzed and nonlinear effects such as thresholding, cycle skipping, and phase locking are investigated by Fokker-Planck methods. The mean square estimation error is obtained exactly for the first-order signal-to-noise ratios (SNR) and demodulator gains. Linear methods of analysis are shown to lead to erroneous results even when the SNR is large. Since solutions to the Fokker-Planck equation for angle-modulation problems are usually difficult to obtain, an orthogonal projection technique is presented for obtaining approximate solutions. The approximate solutions are shown to compare favorably with simulations above and below threshold for the frequency demodulation of a message with a first-order spectrum. (Author).

Download or read book Lasers and Masers a Continuing Bibliography written by United States. National Aeronautics and Space Administration and published by . This book was released on 1965 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: