| 摘要 |
PROBLEM TO BE SOLVED: To maintain high-resolution performance, in distance measurement with an FM-CW frequency modulation-continuous wave radar installation and maintain and detect information on the intensity of a target. SOLUTION: After forming a usual beat signal Sbt0 added with zero-data prolonging sampling period and a half-reverse phase beat signal Sbti0 added with zero data using zero data adding circuits 40 and 42, a normal spectrum signal added with zero data Ssf0 and a half-revere phase spectrum signal added with zero data Ssfi0 are formed using Fourier transformation/amplitude calculating circuit 44 and 46 and the difference is taken with a subtractor 50. The intensity of difference signal Sub0 becomes a value close to the intensity of the beat signal Sbt and almost corresponds to the intensity of the target. Since the waveform shape of the difference signal Sub0 becomes steep, high resolution performance in the distance measurement is maintained. COPYRIGHT: (C)2006,JPO&NCIPI
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