Method and apparatus for recognizing stationary objects with a m

Details Method and apparatus for recognizing stationary objects with a m Method and apparatus for recognizing stationary objects with a m

1999-07-16

2000-09-19

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

Radar mounted on and controls land vehicle

342 71, 342114, 342115, G01S 1393, G01S 1352

Patent

active

061219169

ABSTRACT:
A radar system including a means for distinguishing signals returned from (i.e., reflected by) objects that are stationary with respect to earth (i.e., "stationary objects") from signals returned from objects that are moving along with a host vehicle (i.e., the vehicle upon which the radar system is mounted). The system includes a radar antenna having a relatively narrow beam width centered at a "squint" angle .theta.. When the antenna is aimed such that the center of the beam is at a squint angle of .theta.=60.degree., the Doppler frequency of signals that are reflected from targets that are stationary along the roadside is significantly higher than the frequency of signals reflected from targets that are in the blind spot to the right-rear of the host vehicle and which are moving along with the host vehicle.

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