Spread spectrum algorithm resistance to wideband non-stationary interference
نویسندگان
چکیده
منابع مشابه
A parametric method for non-stationary interference suppression in direct sequence spread-spectrum systems
The problem of non-stationary interference suppression in direct sequence spread-spectrum (DS-SS) systems is considered. The phase of interference is approximated by a polynomial within the considered interval. According to the local polynomial Fourier transform (LPFT) principle, the received signal is dechirped by using the obtained phase approximation and the interference is, in turn, suppres...
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Spread spectrum communication systems have many applications, including interference rejection, multiple accessing, multipath suppression, low probability of intercept transmission, and accurate ranging. Of all the potential applications, the ability of a spread spectrum system to withstand interference, both intentional and unintentional, is probably its greatest asset. Of course, any spread s...
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ID#: 1374 Manu Bansal, Elizabeth S. Pynadath, Lisimachos P. Kondi Department of Electrical Engineering, University at Buffalo, SUNY, Buffalo, NY 14260. Email:{mbansal,pynadath,lkondi}@eng.buffalo.edu and John D. Matyjas, Michael J. Medley, Stephen P. Reichhart, Kurt A. Turck Air Force Research Laboratory/IFGC, 525 Brooks Road, Rome, NY 13441. Email:{john.matyjas,medleym,reichharts,kurt.turck}@r...
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Due to the scarcity of frequency allocations for emerging personal communications services, it has been proposed that spread spectrum (SS) signals be used in such services so that they can be overlaid on existing frequency band occupants. Such SS signals would be constrained in power so as not to interfere with pre-existing, narrowband users. In view of this application, suppression of strong n...
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For a direct-sequence spread-spectrum (DS-SS) system we pose and solve the problem of maximum-likelihood (ML) sequence estimation in the presence of narrowband interference, using the expectation-maximization (EM) algorithm. It is seen that the iterative EM algorithm obtains at each iteration an estimate of the interference which is then subtracted from the data before a new sequence estimate i...
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ژورنال
عنوان ژورنال: The Journal of Engineering
سال: 2019
ISSN: 2051-3305
DOI: 10.1049/joe.2019.0714