| 摘要 |
An on-vehicle radar system capable of detecting a range error from range data based on an echo from a target ( 6 ). Range error is detected when amplitudes of beat frequency components in two adjacent range gates are substantially equal. The system includes a transmitting unit ( 1, 2, 4, 5 ) for radiating a modulated wave having frequency increasing and decreasing repetitively after pulse modulation, a receiving unit ( 8, 9, 10, 11, 12 ) for receiving the echo, and an arithmetic unit ( 13 ) for detecting a range error ascribable to aberration of modulation band width due to frequency increase and decrease of transmission wave (W 1 ) by comparing a range corresponding to the range gate with that determined from a frequency difference between transmission wave and echo. The arithmetic unit ( 13 ) detects the range error on the basis of frequency difference components having substantially same amplitudes in adjacent range gates.
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