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 Coded FH SS Communications in the Presence of Combined Partial Band Noise Jamming Rician Nonselective Fading and Multi User Interference written by and published by . This book was released on 1987 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we address the problem of combating combined interference in spread-spectrum communication links. We consider frequency-hopped spread-spectrum systems with M-ary FSK modulation and noncoherent demodulation which employ forward-error-control coding. The interference consists of partial-hand noise jamming, nonselective Rician fading, other-user interference and thermal noise. The coding schemes which we analyze include: Reed-Solomon codes (with or without diversity and error-only; erasure-only or parallel erasure/error decoding), binary, nonbinary, and dual- k convolutional codes with and 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 (i) the minimum signal-to-jammer energy ratio required to guarantee a desirable bit error rate as a function of p, the fraction of the band which is jammed, when the number of interfering users is fixed, and (ii) the maximum number of users that can be supported by the system as a function of p, when the signal-to-jammer energy ratio is fixed.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

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Download or read book Wireless Applications of Spread Spectrum Systems written by Sawasd Tantaratana and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1998 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: These selected readings bring together introductory and advanced papers on various wireless applications of spread spectrum technology. The papers are grouped into sections according to the application areas: spread-spectrum technology, cellular mobile systems, satellite communications, wireless local area networks, and the global positioning system (GPS).

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Download or read book Performance Analysis of a Coherent Frequency Hopped Spread Spectrum Receiver in the Presence of Jamming Phase Uncertainty and Non ideal Channel Response written by Chun-Meng Su and published by . This book was released on 1989 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: