NDLI: The effects of slotting, burstiness, and jamming in frequency-hopped random access systems

Content Provider	IEEE Xplore Digital Library
Author	Clare, L.P. Sastry, A.R.K.
Copyright Year	1989
Description	Author affiliation: Rockwell Int. Sci. Center, Thousand Oaks, CA, USA (Clare, L.P.; Sastry, A.R.K.)
Abstract	A model is defined for a frequency-hopped spread-spectrum system, and performance is derived for the aspects of system variables by both mathematical analysis and simulation. Interference is characterized at both the symbol level and the packet levels. Values for the jamming parameters a, rho /sub t/ and rho /sub f/ that cause maximum degradation in the users' throughput are determined. A number of specific examples are presented to illustrate the results. It is shown that, unlike the case of unspread systems, performance does not depend heavily on the burstiness of the user traffic or on whether slotted operation is used. As the number of frequency bins q increases, the difference in performance between slotted and unslotted operation becomes insignificant. For large q, only slightly less throughput is obtainable when the traffic is bursty as compared with continuous transmission by the users; this fact justifies the consideration of random-access techniques in a spread-spectrum environment. The effect of the jamming pulse length a is closely related to gamma , the amount of the interference that a symbol can tolerate. If the jamming pulse length is large, the effect of the jammer is similar to additional user traffic of an equal load.
Starting Page	154
Ending Page	160
File Size	661551
Page Count	7
File Format	PDF
DOI	10.1109/MILCOM.1989.103917
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-10-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Jamming Spread spectrum communication Interference Intelligent networks Telecommunication traffic Throughput Frequency conversion Traffic control Degradation Forward contracts
Content Type	Text
Resource Type	Article

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