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Narrowband Interference Suppression Techniques Using Decision Feedback Filtering In Direct Sequence Spread Spectrum Systems
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Book Synopsis Narrowband Interference Suppression Techniques Using Decision Feedback Filtering in Direct Sequence Spread Spectrum Systems by : Katherine Jauregui Lovette
Download or read book Narrowband Interference Suppression Techniques Using Decision Feedback Filtering in Direct Sequence Spread Spectrum Systems written by Katherine Jauregui Lovette and published by . This book was released on 1994 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Narrowband Interference Rejection Techniques in Direct Sequence Spread Spectrum Systems by : Ronald Athelstan Iltis
Download or read book Narrowband Interference Rejection Techniques in Direct Sequence Spread Spectrum Systems written by Ronald Athelstan Iltis and published by . This book was released on 1984 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Excision Techniques in Direct Sequence Spread Spectrum Communication Systems by :
Download or read book Excision Techniques in Direct Sequence Spread Spectrum Communication Systems written by and published by . This book was released on 1990 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a comprehensive summary of a number of methods used in filtering narrowband jammers and interference out of direct sequence spread spectrum communication systems. The basic concept is presented first followed by a discussion of several analog techniques for interference suppression. Most of the emphasis is on digital adaptive methods, which rely on adaptive filtering algorithms. Many of these algorithms are highlighted. This is followed by a discussion on the research which has been conducted in digital excision over the past several years. Two cases based on the author's work are also presented. The first details the performance one can expect from the recursive least squares algorithm when the interferer is a stable tone. An analytical model, which predicts the bit error rate performance for the recursive algorithm under certain conditions, is derived. This model is compared to results obtained from computer simulation, the tracking and filtering capabilities of hte block and recursive least square algorithms when the interference is of the FM-type, i.e., a swept tone having a bandwidth which is approximately 20% of the chip rate. (Author).
Book Synopsis Suppression of Narrow-band Jammers in a Direct Sequence Spread Spectrum Receiver Using LMS Adaptive Filtering Techniques by : Gary J. Saulnier
Download or read book Suppression of Narrow-band Jammers in a Direct Sequence Spread Spectrum Receiver Using LMS Adaptive Filtering Techniques written by Gary J. Saulnier and published by . This book was released on 1985 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book BULLETIN TOME CIII written by and published by Srpska akademija nauka i umetnosti. This book was released on 1992-05-14 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONTENS 1. B. Bo2id, N. Vidojevid, N. Novovid-Simovid, R. Keredki — The influence of austenitization conditions on the correlation between the microstructure and mechanical properties of low-alloyed CrNiMo Steel 1 2. B. Bo2i6, Z. Cvijovie, D. Mihajlovid — An Analysis of the shape of intermetallic phases 9 3. M. M. Ristid, P. Kostio, Jong-I-lee Park — The possibility of obtaining YBa2Cu30), with required properties 17 4. L. J. Challis, A. J. Kent, V. W. Rampton — Listening to Electrons — 23 5. B. Bo06, Z. Cvijovid, D. Mihajlovid — Stereometric parameters of eutectic Microconsti:tuent in Al-Zn-Mg-Cu Alloys 37 6. I. S. Stojanovid, Zorka D. Stojanovie, M. L. Dukid — Analysis of new methods proposed for the narrow-band interference Isuppresion in telecommunication systems using spread spectrum technique — — — 45 Ово дело је лиценцирано под условима лиценце Creative Commons - Attribution-Noncommercial-No Derivative Works 3.0 Serbia http://creativecommons.org/licenses/by-nc-nd/3.0/rs/deed.en
Book Synopsis Narrowband Interference Rejection in Direct-sequence Spread-spectrum Systems Using Time Domain Adaptive Filters by : Cheryl L. Stutzmann
Download or read book Narrowband Interference Rejection in Direct-sequence Spread-spectrum Systems Using Time Domain Adaptive Filters written by Cheryl L. Stutzmann and published by . This book was released on 1998 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Filtering of Direct-sequence Spread Spectrum Systems with Frequency-hop Interference by : John Keelan Grosspietsch
Download or read book Filtering of Direct-sequence Spread Spectrum Systems with Frequency-hop Interference written by John Keelan Grosspietsch and published by . This book was released on 1984 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kalman Filtering of Narrowband Interference from Direct Sequence Spread Spectrum Communications Systems by : Brian William Kozminchuk
Download or read book Kalman Filtering of Narrowband Interference from Direct Sequence Spread Spectrum Communications Systems written by Brian William Kozminchuk and published by . This book was released on 1992 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhanced Time Domain Interference Suppression Techniques by : Gary J. Saulnier
Download or read book Enhanced Time Domain Interference Suppression Techniques written by Gary J. Saulnier and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many methods have been proposed for suppressing interference in a direct sequence spread spectrum signal and a number of these utilize adaptive transversal suppression filters to remove a large portion of the interference prior to despreading. This report investigates the performance of predictive and two-sided adaptive filtering systems and presents a method to improve the performance of the predictive filter by compensating for the distortion introduced into the desired direct sequence signal during the adaptive filtering process. It is shown that the predictive filter acts as a pre-whitener and the two-sided filter acts as a power inverter. Additionally, the two-sided adaptive filter automatically performs the same function as the compensated predictive filter. The performance of the adaptive systems is also studied when there is multipath propagation and it is shown that the presence of multipath allows the filters to partially suppress the desired direct sequence signal, resulting in performance loss. A combination of simulation and analysis was used to perform this study. Simulations were performed using the Signal Processing Work System (SPW) from Alta Group of Cadence Design Systems, Inc.
Book Synopsis Wireless Personal Communications by : Brian D. Woerner
Download or read book Wireless Personal Communications written by Brian D. Woerner and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The area of personal and wireless communications is a burgeoning field. Technology advances and new frequency allocations for personal communication services (PCS) are creating numerous business and technical opportunities. It is becoming clear that an essential requirement for exploiting opportunities is the ability to track the dramatic changes in wireless technology, which is a principal aim of this book. Wireless Personal Communications: Research Developments places particular emphasis on the areas of signal processing, propagation and spread-spectrum, and emerging communication systems. This book contains new results on adaptive antennas for capacity improvements in wireless communication systems, as well as state-of-the-art information on the latest technical developments. Also included are several chapters which discuss the impact of defense conversion on the wireless industry, and related competitive issues. The six parts of the book each focus on a distinct issue in wireless communications. Part I contains several tutorial chapters on key areas in wireless communications. The first chapter is on radio wave propagation for emerging wireless personal communication systems. Chapter two contains a comprehensive study of emerging DSP-based interference rejection techniques for single channel (antenna) systems. Chapter three deals with spread spectrum wireless communications, explaining the concept of spread spectrum, modeling techniques for spread spectrum, and current applications and research issues for spread spectrum systems. Part II focuses on digital signal processing and spread spectrum, two means of creating interference and multipath robust communications. Part III concerns propagation aspects of wireless communications. Part IV discusses the performance of emerging wireless systems. Part V describes the opportunities and pitfalls of defense conversion from the perspective of several U.S. defense firms that have successfully made the transition to commercial wireless. The final section discusses a number of competitive issues regarding personal communication services.
Book Synopsis Kalman Filter-Based Architectures for Interference Excision by :
Download or read book Kalman Filter-Based Architectures for Interference Excision written by and published by . This book was released on 1991 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a novel Kalman filtering approach to the suppression of narrowband interference from direct sequence spread spectrum communications systems. The algorithm is based on the digital phase-locked loop Kalman filter. Because the interference is assumed to be much stronger than either the signal or noise, the Kalman filter locks onto a function related to the interference. The net result is an estimate of the phase of the interference and its amplitude. The algorithm is characterized through computer simulation for the case of narrowband Gaussian noise interference. Examples of the phase- and envelope-tracking capabilities of the algorithm are presented, followed by bit error rate curves for interference bandwidths ranging from 0.5% to 5.0% of the chip rate of the spread spectrum signal. The report concludes with three adaptive architectures.-The first is suitable for constant envelope interference; the second is a more general structure; and the third incorporate a decision-feedback structure accompanied with a training sequence.
Book Synopsis Interference Rejection Techniques to Aid Coarse Acquisition in Direct-sequence Spread-spectrum by : Lynn Denise Gottesman
Download or read book Interference Rejection Techniques to Aid Coarse Acquisition in Direct-sequence Spread-spectrum written by Lynn Denise Gottesman and published by . This book was released on 1993 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhanced Time Domain Interference Suppression Techniques by : Gary J. Saulnier
Download or read book Enhanced Time Domain Interference Suppression Techniques written by Gary J. Saulnier and published by . This book was released on 1998 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many methods have been proposed for suppressing interference in a direct sequence spread spectrum signal and a number of these utilize adaptive transversal suppression filters to remove a large portion of the interference prior to despreading. This report investigates the performance of predictive and two-sided adaptive filtering systems and presents a method to improve the performance of the predictive filter by compensating for the distortion introduced into the desired direct sequence signal during the adaptive filtering process. It is shown that the predictive filter acts as a pre-whitener and the two-sided filter acts as a power inverter. Additionally, the two-sided adaptive filter automatically performs the same function as the compensated predictive filter. The performance of the adaptive systems is also studied when there is multipath propagation and it is shown that the presence of multipath allows the filters to partially suppress the desired direct sequence signal, resulting in performance loss. A combination of simulation and analysis was used to perform this study. Simulations were performed using the Signal Processing Work System (SPW) from Alta Group of Cadence Design Systems, Inc.
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 39 (thesis year 1994) a total of 13,953 thesis titles from 21 Canadian and 159 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 39 reports theses submitted in 1994, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Book Synopsis New Directions in Wireless Communications Research by : Vahid Tarokh
Download or read book New Directions in Wireless Communications Research written by Vahid Tarokh and published by Springer Science & Business Media. This book was released on 2009-08-19 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: New Directions in Wireless Communications Research addresses critical issues in the design and performance analysis of current and future wireless system design. Intended for use by system designers and academic researchers, the contributions are by acknowledged international leaders in their field. Topics covered include: (1) Characterization of wireless channels; (2) The principles and challenges of OFDM; (3) Low-correlation sequences for communications; (4) Resource allocation in wireless systems; (5) Signal processing for wireless systems, including iterative systems collaborative beamforming and interference rejection and network coding; (6) Multi-user and multiple input-multiple output (MIMO) communications; (7) Cooperative wireless networks, cognitive radio systems and coded bidirectional relaying in wireless networks; (8) Fourth generation standards such as LTE and WiMax and standard proposals such as UMB. With chapters from some of the leading researchers in the field, this book is an invaluable reference for those studying and practicing in the field of wireless communications. The book provides the most recent information on topics of current interest to the research community including topics such as sensor networks, coding for networks, cognitive networks and many more.
Book Synopsis Suppression of Narrowband Interference in Pseudo-Noise Spread Spectrum Systems by : John G. Proakis
Download or read book Suppression of Narrowband Interference in Pseudo-Noise Spread Spectrum Systems written by John G. Proakis and published by . This book was released on 1981 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes results of an investigation of narrowband interference suppression in a pseudo-noise (PN) spread spectrum digital communication system in which the signal is also distorted by channel multipath and fading. Techniques for determining the coefficients of a linear, interference suppression filter are described, which are based on linear prediction and conventional spectral analysis methods. Numerical results are presented on the effectiveness of the linear filter in suppressing the interference. Error rate results, obtained via Monte Carlo simulation are presented for a receiver that employs interference suppression and equalization for a fading multipath channel. (Author).
Book Synopsis Narrowband and Multiple-Access Interference Suppression for Direct Sequence Spread Spectrum Communication Receivers by :
Download or read book Narrowband and Multiple-Access Interference Suppression for Direct Sequence Spread Spectrum Communication Receivers written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents research results focused on the mitigation of both narrowband and multiple access interference in direct sequence spread spectrum communication systems. Both linear and nonlinear adaptive algorithmic approaches are developed and reported. Specific attention has been paid to making the algorithmic practicable. In addition to the algorithmic development, a software simulation for a code division multiple access system is developed using a commercially available programming environment.
