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Performance Of Voice Communications Systems In The Presence Of Spread Spectrum Interference
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Book Synopsis Performance of Voice Communications Systems in the Presence of Spread Spectrum Interference by : Leonard Farber
Download or read book Performance of Voice Communications Systems in the Presence of Spread Spectrum Interference written by Leonard Farber and published by . This book was released on 1977 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer simulation model developed for determining the manner in which undesired spread spectrum signals affect the performance of conventional narrowband AM and FM voice communication systems is described. Direct-sequence, frequency-hopping and hybrid, frequency-hopping/direct-sequence, spread spectrum interference signals were modeled. Binary phase-shift keying and minimum-shift keying were included for the carrier modulation of the direct-sequence signals and the direct-sequence portion of the hybrid signals. In addition to the spread spectrum interference, pulsed interference and white Gaussian noise were modeled. Using articulation index as the measure of performance, comparisons are made between system performance for direct-sequence interference and white Gaussian noise. System performance for frequency-hopping or frequency-hopping/direct-sequence interference is compared with that for pulsed interference. (Author).
Book Synopsis Analysis of Wideband Interference in Spread Spectrum Communication Systems by : Giridhar Venkat
Download or read book Analysis of Wideband Interference in Spread Spectrum Communication Systems written by Giridhar Venkat and published by . This book was released on 2010 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increasing density of communications systems in the wireless spectrum, the ability for two communications systems to share the same frequency space will become critical. To accommodate this, it becomes necessary to understand the nature of impairments introduced when two systems share the same spectrum. Traditionally, the performance of a communication system is analyzed in the presence of random interfering noise (Gaussian, Rayleigh, etc.), specific channel impairments like multipath or fading, or narrowband interferers. This work will focus solely on the wideband interference of one communication system on another. Wireless communications systems are increasingly bifurcating along two primary paths: OFDM and Spread Spectrum. This thesis will analyze three parameters of an OFDM system to understand their impact on a forward-path, single-transmitter DSSS system, both analytically and empirically. Ultimately, the effect of these parameters on probability of error and a method to reject the interference of each system on the other will be presented.
Book Synopsis Federal Communications Commission Reports by : United States. Federal Communications Commission
Download or read book Federal Communications Commission Reports written by United States. Federal Communications Commission and published by . This book was released on 1981-07-18 with total page 1236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Communications Systems in the Presence of Interference by : G. B Hawthorne (Jr)
Download or read book Performance of Communications Systems in the Presence of Interference written by G. B Hawthorne (Jr) and published by . This book was released on 1959 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved Anti-Jam Performance in an Adaptive Spread Spectrum Communication System by : Emanuel R. Sive
Download or read book Improved Anti-Jam Performance in an Adaptive Spread Spectrum Communication System written by Emanuel R. Sive and published by . This book was released on 1978 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the anti-jam performance of an adaptive spread spectrum communication's system. The adaptive filter is assumed to be ideal in that it perfectly locates the jamming signal and adapts its bandwidth to exactly filter out the jamming signal. The colored-noise (jammer) and bandlimited white noise are considered to have flat power spectral densities within their respective bandwidths. The spread spectrum technique considered is that of direct sequence modulation. Three criteria are used to evaluate the system: autocorrelation peak degradation, signal-to-noise ratio, and intersymbol interference. The results indicate that an adaptive spread spectrum communication's system is able to provide an increased jam resistant communication system. (Author).
Book Synopsis Evaluation of Word Intelligibility of Two Modulator/Demodulator Systems of a Spread Spectrum Communication System in Presence of Simulated Cockpit Noise by : Thomas J. Moore
Download or read book Evaluation of Word Intelligibility of Two Modulator/Demodulator Systems of a Spread Spectrum Communication System in Presence of Simulated Cockpit Noise written by Thomas J. Moore and published by . This book was released on 1978 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The communication effectiveness of words processed through two modems of a spead spectrum radio system during various jamming conditions was measured in the presence of the simulated noise of an aircraft cockpit. Results indicate that the intelligibility of words processed through the two modems is differentially affected at various jammer-signal (J/S) power ratios by the presence of the simulated F-15A cockpit noise. Word intelligibility decreased with corresponding increases in the J/S power ratio, although the effect is not a simple one, i.e., it is not the same at all J/S levels. It is also indicated that high levels of the simulated cockpit noise produce greater decrements in word intelligibility than low levels for all the J/S power ratios evaluated. The importance of evaluating potential Air Force voice communication systems in as realistic an acoustical environment as practical is emphasized. (Author).
Book Synopsis Interference Effects in Direct Sequence Spread Spectrum Communications Systems by : Ward James Davies
Download or read book Interference Effects in Direct Sequence Spread Spectrum Communications Systems written by Ward James Davies and published by . This book was released on 1989 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress in Spread Spectrum Communications by :
Download or read book Progress in Spread Spectrum Communications written by and published by . This book was released on 1982 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Degradation of the Performance of Communication Systems in the Presence of Interference by : Shaw-Yueh Lin
Download or read book Degradation of the Performance of Communication Systems in the Presence of Interference written by Shaw-Yueh Lin and published by . This book was released on 1981 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relationship between measures of degradation (for digital systems: error probability; and for analog systems: articulation score) has been examined for the purpose of establishing quantitative criteria for satisfactory performance of various modulation systems in the presence of various types of interference. Two empirical relationships are proposed which, with adjustment of only two parameter values, provide good correspondence between signal-to-interference ratio and the performance measure for each case. (Author).
Book Synopsis Performance of Spectral-encoded Ultra-wideband Communication Systems in the Presence of Narrow-band Interference by : Claudio Rafael Da Silva
Download or read book Performance of Spectral-encoded Ultra-wideband Communication Systems in the Presence of Narrow-band Interference written by Claudio Rafael Da Silva and published by . This book was released on 2005 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spread Spectrum, an Annotated Bibliography by : E. J. Haakinson
Download or read book Spread Spectrum, an Annotated Bibliography written by E. J. Haakinson and published by . This book was released on 1978 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recommendations and Reports of the CCIR, 1978: Spectrum utilization and monitoring by : International Radio Consultative Committee
Download or read book Recommendations and Reports of the CCIR, 1978: Spectrum utilization and monitoring written by International Radio Consultative Committee and published by . This book was released on 1978 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Multitone Direct Sequence Spread Spectrum in the Presence of Narrowband and Partialband Interference by : Virat Deepak
Download or read book Performance of Multitone Direct Sequence Spread Spectrum in the Presence of Narrowband and Partialband Interference written by Virat Deepak and published by . This book was released on 2002 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Theodore S. Rappaport Publisher :Springer Science & Business Media ISBN 13 :1461313317 Total Pages :223 pages Book Rating :4.4/5 (613 download)
Book Synopsis Wireless Personal Communications by : Theodore S. Rappaport
Download or read book Wireless Personal Communications written by Theodore S. Rappaport and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless personal communications, or wireless as it is now being called, has arrived. The hype is starting to fade, and the hard work of deploying new systems and services for personal communications is underway. In the United States, the FCC propelled the wireless era from infancy to mainstream with a $7.7 billion auction of 60 MHz of radio spectrum in the 180011900 MHz band. With the largest single sale of public property in the history of mankind mostly complete, the resources of the entire world are being called upon to develop inexpensive, rapidly deployable wireless systems and sub scriber units for an industry that is adding subscribers at greater than 50% annual rate. This growth is commonplace for wireless service companies throughout the world, and in the U.S., where as many as 7 licensed wireless service providers may be competing for cellularfPCS customers within the next couple of years, differentiators in cost, qual ity, service, and coverage will become critical to customer acceptance and use. Many of these issues are discussed in the papers included in this book.
Book Synopsis Cellular Communication Networks and Standards by : Wei Jiang
Download or read book Cellular Communication Networks and Standards written by Wei Jiang and published by Springer Nature. This book was released on with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Direct Sequence Spread Spectrum Communication Systems in Different Jamming Environments by : Gwo-Liang Chen
Download or read book Performance of Direct Sequence Spread Spectrum Communication Systems in Different Jamming Environments written by Gwo-Liang Chen and published by . This book was released on 1989 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
