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ICASSP
2008
IEEE

Cramer-Rao lower bound on doppler frequency of coherent pulse trains

9 years 4 months ago
Cramer-Rao lower bound on doppler frequency of coherent pulse trains
This paper derives the Cramer-Rao lower bound (CRLB) on estimates of the frequency of a coherent pulse-train passively intercepted at a moving antenna. Such estimates are used to locate the transmitting radar. Although frequency estimation algorithms for pulse trains have been proposed, no results were previously available for the CRLB; thus, it has been impossible to assess the complete potential of location. The derived CRLB is compared to previously published algorithm accuracy results. A general rule of thumb is found that the CRLB depends inversely on pulse on-time, number of pulses, variance of pulse times, and the product of signal-to-noise-ratio and sampling frequency; pulse shape and modulation have negligible impact on the result. When K pulses are equally spaced by the pulse repetition interval (PRI), then the CRLB decreases as 1/PRI2 and as 1/K3 .
J. Andrew Johnson, Mark L. Fowler
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICASSP
Authors J. Andrew Johnson, Mark L. Fowler
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