LASER DOPPLER RADAR APPARATUS

WIPO Patent Application WO/2003/100458

A1

A laser Doppler radar apparatus capable of measurement with a high S&sol N ratio even when the phase of the received light fluctuates and detecting a wind speed in a measurement range even when signal components of a plurality of ranges are overlapped on the received light. The apparatus comprises a light source, a code series generator for generating a modulation signal in accordance with a code series, an optical modulation device for FSK−modulating a light signal from the light source by two frequencies in accordance with the modulation signal, an optical transmission&sol reception block for transmitting the FSK−modulated optical signal into the atmosphere and receiving a reception light from a plurality of ranges in the atmosphere, an optical divider for dividing the light signal from the light source and generating a local light, a heterodyne receiver for heterodyne−detecting the received light with the local light, a converter for A&sol D converting the detected signal, and a signal processing block for processing the converted signal. The signal processing block cancels a signal component from a range other than one measurement range in the atmosphere and detects a Doppler frequency in the measurement range.

KAMEYAMA SHUMPEI (JP)
ASAKA KIMIO (JP)
ANDO TOSHIYUKI (JP)
HIRANO YOSHIHITO (JP)

PCT/JP2002/005215

December 04, 2003

May 29, 2002

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MITSUBISHI ELECTRIC CORP (JP)
KAMEYAMA SHUMPEI (JP)
ASAKA KIMIO (JP)
ANDO TOSHIYUKI (JP)
HIRANO YOSHIHITO (JP)

G01P5/26; G01S17/58; (IPC1-7): G01S17/58; G01P3/36

JP2000338246A	2000-12-08
JPH02114241A	1990-04-26
JPH08304541A	1996-11-22
JPH06148326A	1994-05-27
US4167329A	1979-09-11

Soga, Michiteru (8th Floor Kokusai Building, 1-1, Marunouchi 3-chom, Chiyoda-ku Tokyo, JP)

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