Radar beam scanning method, on-vehicle radar apparatus and radar scanning computer program
First Claim
1. A radar beam scanning method for scanning a radar beam for tracing a moving target, comprising the steps of:
- radiating a radar beam scanned along a second direction;
measuring an intensity distribution along said second direction of said radar beam reflected by said moving target;
estimating an angle along said second direction of said moving target;
setting up said radar beam to the estimated angle;
scanning along a first direction perpendicular to said second direction.
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Accused Products
Abstract
In the on-vehicle radar apparatus of the present invention, the vertical scanning width of the radar beam is narrowed, before the horizontal scanning, thereby avoiding unnecessary data processing and improving the data processing efficiently. Further, the S/N ratio of the target detection signal is increased, thereby stabilizing the distance detection and its accuracy. The vertical scanning antenna is a single travelling wave excitation antenna (TWEA) constructed by a plurality of antenna elements. At the same time, the horizontal scanning antenna is a multi-channel antenna wherein a plurality of TWEAs is assigned to a plurality of horizontal directions. The horizontal scanning angle is arbitrarily widened by increasing the number of TWEAs.
20 Citations
15 Claims
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1. A radar beam scanning method for scanning a radar beam for tracing a moving target, comprising the steps of:
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radiating a radar beam scanned along a second direction;
measuring an intensity distribution along said second direction of said radar beam reflected by said moving target;
estimating an angle along said second direction of said moving target;
setting up said radar beam to the estimated angle;
scanning along a first direction perpendicular to said second direction.
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2. An on-vehicle radar apparatus for scanning a radar beam for tracing a moving target, comprising:
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intensity distribution acquiring means for acquiring an intensity distribution along a second direction of said radar beam reflected by said moving target;
tilt angle setting-up means for setting up a tilt angle of said moving target on the basis of said intensity distribution; and
radar operating means for scanning along a first direction perpendicular to said second direction and for at least detecting distances between one or more moving target and said on-vehicle radar apparatus. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computer program for scanning a radar beam for tracing a moving target, comprising the subroutines of:
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radiating a radar beam scanned along a second direction;
measuring an intensity distribution along said second direction of said radar beam reflected by said moving target;
estimating an angle along said second direction of said moving target;
setting up said radar beam to the estimated angle;
scanning along a first direction perpendicular to said second direction.
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Specification