Download or read book Performance Evaluations of Fast Frequency hopped Spread spectrum Communication Systems with Partial band Noise Jamming and Multitone Jamming written by Kah Chan Teh and published by . This book was released on 1998 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hybrid Frequency phase Modulation written by Ibrahim Ghareeb and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studies the performance of joint frequency-phase modulation (JFPM) communication systems, it considers its spread spectrum as well as narrow band applications. JFPM signal has been mathematically modeled. Its power spectral density and bandwidth efficiency have been analyzed. A bit error rate performance of JFPM signals in AWGN as well as in Rayleigh fading channels is obtained. Assuming statistical independence of the diversity channels, we have analyzed the diversity combining reception of JFPM over Rayleigh fading channels. These analytical results show that, JFPM signals are characterized by relative simplicity in obtaining large set of waveforms, and thus by varying its parameters it can be suitable for either bandwidth-limited or power-limited applications. Compared to M-ary FSK signals that use the same number of tones, the needed minimum frequency separation between two adjacent tones for JFPM signals to satisfy the orthogonality condition is reduced. A spread spectrum system referred to as frequency hopped/joint frequency-phase modulation (FH/JFPM) has also been presented. The system model is described for both slow frequency hopping (SFH/JFPM) and fast frequency hopping (FFH/JFPM). Bit error rate performance for SFH/JFPM in the presence of broadband and partial-band noise jamming is analyzed, and the worst case jamming performance of this system is evaluated. It is shown that SFH/JFPM is less sensitive to broadband and partial-band noise jamming than the conventional frequency hopped systems. The design and analysis of the FFH/JFPM system over Rayleigh fading channels is presented. An expression for the probability of a bit error is obtained. Results have shown that the FFH/JFPM outperforms the conventional frequency hopped systems. A detailed analysis for the probability density function of the received signal phase in the presence of multitone jamming is provided. The probability density function is derived for any arbitrary transmitted signal phase. Based on this analysis, the probability of error for the FH/M-ary DPSK system in the presence of multitone jamming is obtained. The performance of coherent frequency hopped M-ary PSK system in multitone jamming environments has also been presented. Bit error rate performance of this system is analyzed. A simple expression for the probability of a bit error is obtained. The performance of this system in worst case jamming is also given.
Download or read book Performance Evaluation of Different Jamming Strategies Over Uncoded Noncoherent Fast Frequency Hopping MFSK Communication Systems written by Konstantinos Karkatzounis and published by . This book was released on 2004-09-01 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fast frequency hopping technique is considered one of the most effective Electronic Protective Measures (EPM) for military communications systems in order to mitigate the effect of a follower or repeat jammer. This thesis evaluates the performance of different jamming strategies as barrage noise jamming, partial band jamming and multitone band jamming against an uncoded noncoherent FFH/MFSK system with a conventional receiver. The theoretical and simulated results showed that the best jamming strategies for the examined modulation orders M=2,4,8 is the optimum case of multitone band jamming. As a second goal, this thesis also provides a preliminary analysis for an uncoded noncoherent FFH/MFSK system in a Rayleigh fading channel. This analysis includes the theoretical and simulated results for the influence in the performance from a barrage noise jammer along with AWGN. The results of the theoretical analysis and the simulation modeling for both cases can be used as guidelines to analyze more complicated jamming or combinations of jamming strategies against FFH/MFSK communication system.
Download or read book Performance Analysis of Diversity Combining for Frequency hop Communications Under Partial band and Multitone Interference written by Gang Li and published by . This book was released on 1992 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spread Spectrum Communications Handbook Electronic Edition written by Marvin K. Simon and published by McGraw Hill Professional. This book was released on 2001-09-22 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The acknowledged Spread-Spectrum Bible the most complete reference in the field! INCLUDESCD-ROM CONTAININGTHE ENTIRE BOOKIN FULLY-SEARCHABLE PDF Spread-spectrum systems have found important commercial applications in CDMA cellular networks and wireless personal communication networks. Communications engineers and technicians now have ready access to a wealth of spread-spectrum information in this exhaustive handbook the most comprehensive and authoritative compendium on spread-spectrum systems available anywhere. Written by recognized authorities in the field, the Handbook presents both theoretical basics and practical applications, providing succinct, results-oriented solutions to engineering problems. Starting with basic concepts and system models, the book covers: Anti-jamming communication systems Coherent direct-sequence systems Non-coherent frequency-hopped systems Coherent and differentially coherent modulation techniques Pseudonoise acquistion and tracking in direct sequence receivers Time and frequency synchronization of frequency-hopped receivers Low probability of intercept communications In addition, it offers an in-depth look at multiple access communications and positioning systems and discusses the growth of spread-spectrum applications. INCLUDES CD-ROM CONTAINING THE ENTIRE BOOK IN FULLY SEARCHABLE PDF
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis of Both Hybrid and Frequency Hopped Phase coherent Spread Spectrum Systems written by Giovanni Cherubini and published by . This book was released on 1986 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coded FH SS Frequency Hopped Spread Spectrum Communications in the Presenceof Combined Partial Band Noise Jamming Rician Nonselective Fading and Multiuser Interference written by Evaggelos Geraniotis and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report, we address the problem of combatting combined interference in spread-spectrum communication links. We consider frequency-hopped spread-spectrum systems with M-ary FSK modulation and noncoherent demodulation that use forward-error control coding. The interference consists of partial-band noise jamming, nonselective Rician fading, other-user interference, and thermal noise. The coding schemes that we analyze include: Reed-Solomon codes (with or without diversity and error/only), erasure-error or parallel erasure/error decoding); binary, nonbinary, and dual-k convolutional codes with or without side information (information about the state of the channel); and concatenated schemes (Reed-Solomon outer codes with either inner detection-only block codes or inner convolutional codes). In all cases, we derive the minimum signal-to-jammer energy ratio required to guarantee a desirable bit error rate as a function of the fraction of the band that is jammed when the number of interfering users is fixed, and the maximum number of users that can be supported by the system as a function of the fraction of the band that is jammed, when the signal-to-jammer energy ratio is fixed. (Author).
Download or read book Spread Spectrum Communications written by Marvin K. Simon 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:
Download or read book Principles of Spread Spectrum Communication Systems written by Don Torrieri and published by Springer. This book was released on 2018-05-03 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thoroughly revised textbook provides the fundamentals of spread-spectrum systems with a continued emphasis on theoretical principles. The revision includes new sections and appendices on characteristic functions and LaPlace transforms, orthonormal expansions of functions, the SNR wall in detection, multiple-input multiple-output systems, multicode and multirate systems, interference cancelers, complementary codes, chaos and ultrawideband systems, and the normalized LMS algorithm. As with previous editions, the author presents topics in a practical way that is of interest to both researchers and system designers. He includes updated problems at the end of each chapter, which are intended to assist readers in consolidating their knowledge and to provide practice in analytical techniques. In addition to the new and revised material, the author adds 50 new pages to make the book more accessible to graduate students in electrical engineering.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Partial band Noise Jamming on BER Performance of Spread Spectrum System written by Evelyn Sok Hoon Tan and published by . This book was released on 2003 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference Record written by and published by . This book was released on 1994 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Fast Frequency Hopped MFSK Spread Spectrum Communication in the Presence of AWGN and Tone Jamming written by Robert Ward White and published by . This book was released on 1989 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Suppression of Partial band Noise Jamming on FFH FSK Spread spectrum Communication Systems written by Keh Hoe Low and published by . This book was released on 2003 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Diversity ECCM Performance of Frequency Hopping CPFSK in Partial Band Noise Jamming written by L. E. Miller and published by . This book was released on 1988 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough analysis is made of the uncoded probability of error achieved by by a hopped CPFSK (narrowband digital FM) radio link while subject to partial band noise jamming. Included in the analysis are the effects of thermal noise, FM clicks, and intersymbol interference, in addition to the jamming. For both limiter-discriminator and differential detection, it is shown that a repeat diversity combining method of summing detector samples does not yield a diversity gain against worst-case partial-band noise jamming, despite the nonlinearity of the receiver. The analytical procedures formulated, and computer programs, developed, can be modified to treat other CPFSK combining metrics; it is recommended that other soft-decision metrics be evaluated for ECCM properties, since it is known that at diversity gain is theoretically possible using perfect side information. In the report, easily calculated approximations and short-cut expressions for the error probability are assessed for accuracy, using the more complicated exact formulas. Keywords: Frequency shift keyers; Continuous phase, Frequency hopping, Digital FM radio, ECCM, jamming, Statistical communication theory; Phase distributions. (JD/RH).
Download or read book Bridging the Gap Interoperability Survivability Security written by and published by . This book was released on 1989 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:
