Carrier Tracking Loop Performance in the Presence of Strong CW Interference

In a coherent data link, narrow-band radio frequency interference (RFI) near the carrier frequency can degrade the link performance by impacting the carrier tracking loop behavior and producing a partial or complete loss of coherence. If the RFI is strong enough, this effect can occur even though th...

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Published in:I.R.E. transactions on communications systems 1981-01, Vol.29 (6), p.911-916
Main Author: Levitt, B.
Format: Article
Language:English
Subjects:
Bandwidth
Coherence
Degradation
Frequency
Narrowband
Performance analysis
Performance loss
Phase locked loops
Radiofrequency interference
Tracking loops
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description In a coherent data link, narrow-band radio frequency interference (RFI) near the carrier frequency can degrade the link performance by impacting the carrier tracking loop behavior and producing a partial or complete loss of coherence. If the RFI is strong enough, this effect can occur even though the frequency of the interference lies well beyond the carrier tracking loop bandwidth. In 1973, Bruno and Bianchard independently performed similar analyses of the response of a phase-locked loop (PLL) to a continuous wave (CW) interferor, and derived conditions under which the loop drops carrier lock and tracks the interference instead. This paper compares the contributions of these two analysts, and extends Bruno's closed form approximation for the loop phase error to the entire lock region.
doi_str_mv 10.1109/TCOM.1981.1095066
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ispartof I.R.E. transactions on communications systems, 1981-01, Vol.29 (6), p.911-916
issn 0090-6778
0096-2244
1558-0857
language eng
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source IEEE Xplore (Online service)
subjects Bandwidth
Coherence
Degradation
Frequency
Narrowband
Performance analysis
Performance loss
Phase locked loops
Radiofrequency interference
Tracking loops
title Carrier Tracking Loop Performance in the Presence of Strong CW Interference
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