SHERP

Median-prefiltering-based robust acquisition of direct-sequence spread spectrum signals in wide-band pulse jamming

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Authors
Lee, Yong-Hwan; Kim, Seung-Jun
Issue Date
2002-01
Publisher
Institute of Electrical and Electronics Engineers
Citation
IEEE Transactions on Vehicular Technology, vol. 51, no.1, pp. 171-197, January 2002
Keywords
Median filterrobust acquisitionspread spectrumwide-band jamming
Abstract
We propose robust acquisition schemes for chip
time-synchronous direct-sequence spread-spectrum (DS/SS)
signals in wide-band pulse jamming. To mitigate the performance
degradation due to the impulse-like wide-band jamming signal,
the received signal is preprocessed by employing simple order
statistic filters.We consider the use of two types of median filtering
schemes: a running median filter operating at a chip rate and a
block median filter processing the received signal sampled at an
oversampling rate. For analytic design, the partial correlation
of median filtered pseudonoise (PN) signals is approximated by
a piecewise linear model using an upper bound. The analytic
design is verified by computer simulation. Finally, the acquisition
performance of the proposed schemes is compared to that of
conventional schemes.
ISSN
0018-9545
Language
English
URI
http://hdl.handle.net/10371/6737
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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