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Author : Claude Jodoin
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (445 download)
Download or read book Detection of Direct-sequence Spread-spectrum Signals in a Multipath Fading Environment written by Claude Jodoin and published by . This book was released on 1999 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (227 download)
Download or read book Direct-Sequence Spread-Spectrum Performance in a Multipath Fading Environment written by and published by . This book was released on 1993 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of coherent direct-sequence spread-spectrum communication systems with specular multipath fading is analyzed in terms of average probability of error. Approximations to such are based on the characteristic-function method. The probability mass function of the correlation receiver output is also derived with this approach. Numerical results are presented for various multipath environments with deterministic gain coefficients and channel coding applications. Spread-spectrum communications, Multipath fading.
Author : Amer A. Hassan
Publisher : Springer Science & Business Media
ISBN 13 : 1461555310
Total Pages : 170 pages
Book Rating : 4.4/5 (615 download)
Download or read book Perspectives in Spread Spectrum written by Amer A. Hassan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perspectives in Spread Spectrum brings together studies and recent work on six exciting topics from the spread spectrum arts. The book gives a wide, collective view of trends, ideas, and techniques in the spread spectrum discipline, due to the authors' extensive work on spread spectrum techniques and applications from different vantage points. The inexorable march of electronics towards ever faster, ever smaller, and ever more powerful electronic and optical circuitry has wrought, and will continue to enable, profound changes in the spread spectrum arts, by allowing increasingly complex signalling waveforms and statistical tests to be implemented as the theory beyond spread spectrum continues to evolve. Perspectives in Spread Spectrum is divided into six chapters. The first chapter deals with sequence spreading design. There is not a single metric for design of spreading sequences; rather, the design is ideally tailored to the specific scenario of usage. This chapter delves into recent and very promising synthesis work. The second chapter deals with OFDM techniques. As channels become wider and trans-channel fading (or jamming) becomes frequency selective across the band, OFDM techniques may provide a powerful alternative design perspective. The third chapter is a generalization of the venerable Walsh functions. A new modulation scheme, Geometric Harmonic Modulation, GHM for short, is reviewed and characterized as a form of OFDM. From GHM, a further generalization of the Walsh functions is derived for non-binary signalling. The fourth chapter is concerned with some new and exciting results regarding the follower jammer paradigm. A counter-countermeasure technique is reviewed, notable for its counterintuitive characteristic which can be understood from a simple yet elegant game framework. The fifth chapter recounts some results pertaining to random coding for an optical spread spectrum link. The technique is based on laser speckle statistics and uses a coherent array of spatial light modulators at the transmitter but allows the receiver to be realized as a spatially distributed radiometric and therefore incoherent structure. The sixth and final chapter looks at an important and interesting application of spread spectrum to accurately locate a wideband, ‘bent pipe’, satellite transponder. It is, in a strong sense, an inverted GPS technique. Perspectives in Spread Spectrum serves as an excellent reference and source of ideas for further research, and may be used as a text for advanced courses on the topic.
Author : Gerald O. Venier
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (227 download)
Download or read book A Method for Combating Fading Multipath Conditions in a Direct-Sequence Spread-Spectrum System written by Gerald O. Venier and published by . This book was released on 1986 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The large bandwidth of a direct-sequence spread-spectrum communications system provides increased time-delay resolution which can resolve multipath components that would not be resolved by the system without spreading. However, normal direct-sequence systems do not fully exploit this capability. In these systems the received signal is despread by correlation with the reference signal (the spreading waveform) at a single delay. In a multipath situation where there are multiple resolvable delays one of these delays must be chosen for the correlation. If the path with that delay is fading then the signal may be lost at times, even when a strong signal exists at a different delay. In the system proposed here the despreading correlation is performed at a number of delays and the results are combined to provide the improvement expected from a diversity system under fading multipath conditions. The combining is simplified by the use of differential-phase-shift modulation of the data. An added advantage of the proposed system is that the outputs of the multiple-delay correlator are ideal inputs to a simple but effective code-delay tracking system based on keeping the centre of gravity of the values in the correlation window centred in the window. (Canada).
Author : E. A. Geraniotis
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effects of Specular Multipath Fading on Noncoherent Direct-Sequence Spread-Spectrum Communications written by E. A. Geraniotis and published by . This book was released on 1982 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kun-wah Yip
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (513 download)
Download or read book A Study of Direct-sequence Spread-spectrum Multiple-access Communications Over Multipath Rayleigh Fading Channels written by Kun-wah Yip and published by . This book was released on 1995 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacobus David Vlok
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (117 download)
Download or read book Detection of Direct Sequence Spread Spectrum Signals written by Jacobus David Vlok and published by . This book was released on 2014 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dong-Chang Shiue
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (154 download)
Download or read book Detection of Direct-sequence Spread Spectrum Signals written by Dong-Chang Shiue and published by . This book was released on 1985 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robin A. Dillard
Publisher : Artech House Radar Library (Ha
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (318 download)
Download or read book Detectability of Spread-spectrum Signals written by Robin A. Dillard and published by Artech House Radar Library (Ha. This book was released on 1989 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: A desktop reference for designers of military communication systems using spread-spectrum techniques to achieve a low probability of intercept. Shows how to evaluate the detectability of candidate signal structures mathematically, and to select signal parameters that minimize the probability of dete
Author : Mamdouh Gouda
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (594 download)
Download or read book Detection and Characterisation of Direct Sequence Spread Spectrum Signals written by Mamdouh Gouda and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marvin K. Simon
Publisher :
ISBN 13 : 9780881750157
Total Pages : 456 pages
Book Rating : 4.7/5 (51 download)
Download or read book Spread Spectrum Communications written by Marvin K. Simon and published by . This book was released on 1985 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Saeed S. Ghassemzadeh
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (318 download)
Download or read book Effects of Channel Fading on a Direct Sequence-spread Spectrum Signal at 2 GHz written by Saeed S. Ghassemzadeh and published by . This book was released on 1994 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Edward Borth
Publisher :
ISBN 13 :
Total Pages : 366 pages
Book Rating : 4.:/5 (227 download)
Download or read book Performance Analysis of Direct-sequence Spread-spectrum Multiple-access Communication Via Fading Channels written by David Edward Borth and published by . This book was released on 1979 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of biphase direct-sequence spread-spectrum multiple-access (SSMA) communication for a general class of fading channels is investigated. The channels considered are those for which the channel output consists of a strong stable specular signal plus a faded version of this signal. Such channels are the result of a transmission medium which gives rise to a major stable communication path and a number of additional weaker communication paths. The fading channel is modeled as a general is modeled as a general wide-sense-stationary uncorrelated-scattering (WSSUS) channel -- a model which is general enough to exhibit both time and frequency selectivity and to impose no restrictions on the fading rate. A discussion of the important parameters of the WSSUS channel is given and two important classes of WSSUS channels are developed from the general fading channel model; time-selective fading channels and frequency-selective fading channels. In analyzing the performance of direct-sequence SSMA communications via fading channels two measures of system performance that are considered are average signal-to-noise ratio at the receiver output and the average probability of error. (Author).
Author : Narender Reddy Mannem
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (712 download)
Download or read book Adaptive Data Rate Multicarrier Direct Sequence Spread Spectrum in Rayleigh Fading Channel written by Narender Reddy Mannem and published by . This book was released on 2005 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : Computer Science Press, Incorporated
ISBN 13 : 9780881750140
Total Pages : 392 pages
Book Rating : 4.7/5 (51 download)
Download or read book Spread Spectrum Communications written by and published by Computer Science Press, Incorporated. This book was released on 1985 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Reidar Skaug
Publisher : IET
ISBN 13 : 9780863410345
Total Pages : 228 pages
Book Rating : 4.4/5 (13 download)
Download or read book Spread Spectrum in Communication written by Reidar Skaug and published by IET. This book was released on 1985 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is devoted to advanced radiocommunication, discussing the merits and operational aspects of spread spectrum signalling. Spread spectrum modulation is emerging as one of the most important tools for combatting a wide range of problems usually encountered in radiocommunication. For military applications the signalling is able to resist difficulties deliberately introduced by an enemy, such as jamming and eavesdropping. For civil application, the efficient signal multiplexing and multipath rejection capability is of great interest. The price paid however is the need for very complex processing of the radio signals. This task put great challenges on new technologies and design, and it is only recently that operational systems have started to emerge from the laboratories. The book starts by comparing spread spectrum modulation and conventional modulation methods, and then discusses demodulation, which requires both special acquisition and synchronisation techniques. The electronic warfare scenario is introduced, discussing the principles of various spreading techniques and possible countermeasures. The coding for bandwidth spreading in a direct sequence spread spectrum system is treated by discussing the most common codes and their different figures of merit with respect to multipath, code division multiplexing and signal concealment. The book also illustrates the possible benefits, as well as limits to the use of new hardware technology to accomplish the various functions necessary for successful operation of a spread spectrum system. The effect of the propagation environment on spread spectrum is treated both analytically and through reported experiments and simulations. Finally the book considers the task of designing a complete communication network and discusses the usefulness and technology for additional interference suppressing techniques suitable to work with spread spectrum systems.
Author : Don Torrieri
Publisher : Springer Science & Business Media
ISBN 13 : 1441995951
Total Pages : 589 pages
Book Rating : 4.4/5 (419 download)
Download or read book Principles of Spread-Spectrum Communication Systems, Second Edition written by Don Torrieri and published by Springer Science & Business Media. This book was released on 2011-07-15 with total page 589 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a concise but lucid explanation of the fundamentals of spread-spectrum systems with an emphasis on theoretical principles. Throughout the book, learning is facilitated by many new or streamlined derivations of the classical theory. Problems at the end of each chapter are intended to assist readers in consolidating their knowledge and to provide practice in analytical techniques. The choice of specific topics is tempered by the author’s judgment of their practical significance and interest to both researchers and system designers. The evolution of spread spectrum communication systems and the prominence of new mathematical methods in their design provided the motivation to undertake this new edition of the book. This edition is intended to enable readers to understand the current state-of-the-art in this field. More than 20 percent of the material in this edition is new, including a chapter on systems with iterative channel estimation, and the remainder of the material has been thoroughly revised.
