Suppression of Weather Clutter by Means of Log-Normal/CFAR Circuit Modified from CA LOG/CFAR Circuit

Autor:	Shuji Sayama, Seishiro Ishii
Rok vydání:	2014
Předmět:	Energy Engineering and Power Technology Constant false alarm rate law.invention Beamwidth law Log-normal distribution Clutter Electrical and Electronic Engineering Antenna (radio) Akaike information criterion Radar Algorithm Remote sensing Weibull distribution Mathematics
Zdroj:	Electrical Engineering in Japan. 187:1-9
ISSN:	0424-7760
DOI:	10.1002/eej.22514
Popis:	SUMMARY We have observed weather clutter including targets (ships) using an S-band radar with a frequency of 3.05 GHz, a beamwidth of 1.8°, and a pulse width of 0.5 μs. To investigate weather clutter amplitude statistics, we introduce the Akaike information criterion (AIC). We have found that the weather clutter amplitudes obey log-normal, Weibull, and log-Weibull distributions with shape parameters of 0.329 to 0.477, 4.40 to 4.55, and 11.93 to 16.44, respectively, for data within the beamwidth of an antenna. We propose the log-normal/CFAR circuit, modified from a cell-averaging (CA) LOG/CFAR circuit. It is found that weather clutter is suppressed with improvement of 51.58 dB by log-normal/CFAR.
Databáze:	OpenAIRE
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