OBSERVATION DEVICE, OBSERVATION METHOD, AND PROGRAM

WIPO Patent Application WO/2018/174172

A1

[Problem] In radar observation and the like, to enable extraction of an actual radio wave source to make it possible to distinguish the same from information that is not an actual radio wave source, even if the signal-to-noise ratio is not sufficiently high. [Solution] A signal processing unit 15 performs a Fourier transform in an azimuth angle frequency domain of a distribution function of a received electric field signal from an antenna in which a beam is scanned within a prescribed azimuth angle, on the basis of the received electric field signal and an azimuth angle signal of the scanned beam, divides a signal resulting from a Fourier transformed first spectral function by a signal resulting from a second spectral function obtained by performing a Fourier transform in the azimuth angle frequency domain of an antenna pattern of the antenna, and uses Prony's method to fit the divided signal to parameters using an exponential function including a real part and an imaginary part.

SEZAI TOSHIHIRO (JP)

PCT/JP2018/011447

September 27, 2018

March 22, 2018

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JAPAN AEROSPACE EXPLORATION (JP)

G01S3/58; G01S7/02

JP2000114850A	2000-04-21
JP2000101325A	2000-04-07
JP2017096892A	2017-06-01
US4750147A	1988-06-07

KENJI INOMOTO: "Estimation of individual vehicle noise power by exponential approximation", ACOUSTICAL SOCIETY OF JAPAN, vol. 38, no. 1, 1981, pages 30 - 35, XP055608882, ISSN: 0369-4232
SEZAI, T.: "Improvement of Directional Resolution of Rotational Radar by Prony Analysis of Deconvolved Antenna Output", IEICE TECHNICAL REPORT, vol. 117, no. 182, 17 August 2017 (2017-08-17), pages 37 - 42, ISSN: 0913-5685

OMORI, Junichi (JP)

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