Download or read book A Simulation Analysis of Interference Induced by a Frequency Hopping Signal to an FM Signal written by Ghulam H. Raz and published by . This book was released on 1992 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Compatibility Analysis of Spread spectrum and FM Land Mobile Systems written by John R. Juroshek and published by . This book was released on 1979 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Co site Interference Rejection Effect of Frequency Hopping NCFSK Spread Spectrum written by Lee Changho and published by . This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this thesis consider the co-site interference problem and the rejection method. The Frequency Hopping spread spectrum has the interference rejection capability. To find the effect in this thesis use four interference model, 1) Non-Hopping to Non-Hopping signal interference. 2) Non-Hopping to FH signal interference. 3) FH to Non-Hopping signal interference. 4) FH to FH signal interference. Also the interference models change the interference power, and the number of hopping slots. The analysis results show the interference rejection effect of FHSS."--Abstract.

Download or read book Interference Analysis written by John Pahl and published by John Wiley & Sons. This book was released on 2016-04-13 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes how interference can be managed so that radio systems co-exist, without harmful mutual effects, within a finite amount of spectrum. This is timely in view of the increasing proliferation of wireless systems. It covers both the processes, such as regional or international coordination, as well as the engineering principles. Written by an author with extensive experience in the industry, it describes in detail the main methodologies for calculating or computing the interference between radio systems of the same type, and also between radio systems of different types

Download or read book Performance Enhancements in a Frequency Hopping GSM Network written by Thomas Toftegaard Nielsen and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the explosive global growth in the number of mobile subscribers, as well as the growth predicted in the mobile data segment, the need for improved spectrum efficiency on the radio interface becomes more and more important. Frequency hopping (FH) is an effective method for improving the spectrum efficiency. One of the advantages of FH is that it can be combined with other spectral efficiency improving features like power control, handover and reuse partitioning. Performance Enhancements in a Frequency Hopping GSM Network covers FH and some of the additional features in detail. It begins with an in-depth description of the basic concept of FH on link level as well as on system level. Different methods have been used for analysis, such as link level simulations, network level simulations and classic tele-traffic theory. Special features of Performance Enhancements in a Frequency Hopping GSM Network: Combines the practical experiences of operator and vendor with more theoretical research methods. An in-depth treatment of prevailing problems in GSM networks; Presentation of a new method, computer-aided network design (CAND), which has been developed to analyse the complex network structures of a GSM network. CAND provides the possibility for more realistic performance evaluations than conventional methods; Provides GSM-specific analysis of functionality improvements in power control, discontinuous transmission, and several handover algorithms; Explanation of the quality and capacity gains of features like the combination of FH and reuse partitioning, referred to as intelligent frequency hopping; A frequency planning method for FH GSM networks is presented. This method exploits the benefits from FH directly in the allocation process, increasing the overall frequency plan.

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).

Download or read book Measurements of an FM Receiver in FM Interference written by John R. Juroshek and published by . This book was released on 1979 with total page 52 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 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Fast Frequency hopping Diversity Combiners in Multiple Access Interference for Ad Hoc Networks written by Helene Ejenyi Tayong and published by . This book was released on 2006 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this work is to evaluate the performance of fast frequency-hopping diversity combiners in multiple access interference for ad hoc networks. Multiple access interference (MAI) is the interference that is common in a network with many devices sharing the channel. A model developed in, i.e. the alpha-stable distribution suggested for modeling impulsive signals, is investigated to characterize MAI for an ad hoc network. Impulsive processes are characterized by the presence of spikes or extreme outliers. As such, their probability density functions (pdfs) have heavier tails. Such impulsive behaviors have been verified experimentally in various radio and underwater acoustic channels. The characteristic exponent (the parameter alpha) controls the impulsive behavior of the process. Techniques based on characteristic functions, the Fourier transform of the probability density function (pdf), are used to calculate the probability of error since no-closed form exists for their distributions. Frequency-hopping spread spectrum (FHSS) multiple access radio networks using the same modulation and power is considered. FHSS is a powerful technique used in communication systems to provide protection against jamming and fading. The problem is applicable in wireless random-access communication systems where information about transmitters' positions is not provided. The signal strength attenuates with distance. The focus is on Fast Frequency-hopping (FFH) in order to exploit frequency diversity; a condition where the same data bit is transmitted on multiple independently faded hops. A modulation technique called frequency hopping multilevel frequency shift keying (FH-MFSK) is used to allow many users to effectively share the same frequency band. The Reduced Fuzzy Rank Order Detector (R-FROD), a FFH diversity combiner is studied in this interference environment and its performance is compared with that of hard decision majority vote (HDMV) detector, maximum rank sum receiver (MRSR) and order statistic normalized envelope detector (OS-NED). Simulation results show that the R-FROD is able to outperform the MRSR, OS-NED and HDMV detectors across a range of values for alpha. R-FROD is analyzed in alpha-stable environment using Gaussian and Cauchy membership functions. Simulation results show that either membership function can be used in R-FROD to analyze its performance in an alpha-stable environment. Increasing the hop sequence length reduces the probability of error. The analysis presented is important in the design of efficient interference suppression techniques and in solving mobile wireless communication systems. -- Abstract.

Download or read book Demystifying Radio Frequency Interference written by Donald J. Arndt and published by Trafford on Demand Pub. This book was released on 2009 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more and more wireless devices comes more interference, this book shows engineers how to locate, reduce and eliminate the source!

Download or read book Wireless Personal Communications written by William H. Tranter and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Personal Communications: Bluetooth Tutorial and Other Technologies presents a broad range of topics in wireless communications, including perspectives from both industry and academia. The book serves as a reflection of emerging technologies in wireless communications and features papers from world-renowned authors on the subject. A new tutorial on the emerging Bluetooth technology is also presented. Wireless Personal Communications: Bluetooth Tutorial and Other Technologies serves as an excellent reference and may be used as a text for advanced courses on the subject. It is an essential tool for graduate students, postgraduate researchers, academics, and anyone working in the research aspect of the wireless communications industry.

Download or read book Conference Record written by and published by . This book was released on 1986 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Report written by and published by . This book was released on 1997 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Communications computers Teamed for the 90 s written by and published by . This book was released on 1986 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Digital Communication System Using System VUE written by Denis Silage and published by Firewall Media. This book was released on 2006 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radio Frequency System Architecture and Design written by John W. M. Rogers and published by Artech House. This book was released on 2013-10-01 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communication devices such as smart phones, GPS systems, and Bluetooth, are now part of our daily lives more than ever before. As our communication equipment becomes more sophisticated, so do the radios and other hardware required to enable that technology. Common radio architectures are required to make this technology work seamlessly. This resource describes practical aspects of radio frequency communications systems design, bridging the gap between system-level design considerations and circuit-level design specifications. Industry experts not only provide detailed calculations and theory to determine block level specifications, but also discuss basic theory and operational concepts. This resource also includes extensive, up-to-date application examples.