Frequency Estimation in Coherent, Periodic Pulse Trains

Radars use coherence to increase the signal-processing gain. In electronic support, that same coherence can be exploited to accurately estimate carrier frequency when measured modulo the pulse repetition frequency. Such estimates can be used for passive emitter geolocation, for example. In the pione...

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Bibliographic Details
Published inIEEE signal processing letters Vol. 27; p. 1
Main Authors Clarkson, Ian Vaughan, Sirianunpiboon, Songsri, Howard, Stephen D.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Carrier frequencies
Coherence
Emitters
Estimation
Frequency estimation
Frequency modulation
Integers
Pulse repetition frequency
Pulse repetition interval
Pulse shape
Shape
Signal processing
Signal to noise ratio
Transmitters
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Summary:Radars use coherence to increase the signal-processing gain. In electronic support, that same coherence can be exploited to accurately estimate carrier frequency when measured modulo the pulse repetition frequency. Such estimates can be used for passive emitter geolocation, for example. In the pioneering work of Howard & Lavoie on this topic, results are demonstrated only where the pulse repetition interval (PRI) is an integer and where pulses are sinusoidal. In this paper, we show how the results can be generalised to a broad class of pulse shapes, without needing to know the pulse shape in advance. We also show how the signals may be efficiently processed when the PRI is non-integer.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2020.3011834