RADAR DEVICE
First Claim
1. A radar device configured to be installed in a moving body which travels on a road surface, comprising:
- radar transmitting circuitry which, in operation, transmits a radio-frequency radar transmission signal in a horizontal direction from a transmission antenna which is inclined in a predetermined direction; and
radar receiving circuitry which, in operation, estimates a distance to a stationary target and an azimuth of the target, using a reflected wave signal which is the radar transmission signal reflected from the target,wherein the radar receiving circuitry includes;
correlation calculation circuitry which, in operation, calculates a correlation value between the reflected wave signal and a transmission code of the radar transmission signal;
speed detecting circuitry which, in operation, detects a moving speed and a moving direction of the moving body;
template generating circuitry which, in operation, calculates a variation in a phase component of the reflected wave signal for each parameter set of N parameter sets of the distance to the target and the azimuth of the target to generate N templates, the azimuth being defined by the moving speed and the moving direction of the moving body;
N template correlation calculation circuitry which, in operation, calculates correlation values between the generated N templates and the correlation value output from the correlation calculation circuitry; and
output selection circuitry which, in operation, determines a type of the target, using the distance to the target and the azimuth of the target corresponding to any one of the generated N templates, on the basis of outputs from the N template correlation calculation circuitry.
2 Assignments
0 Petitions
Accused Products
Abstract
A radar transmitting unit Tx transmits a radio-frequency radar transmission signal from a transmission antenna which is inclined in the direction of a depression angle φ. A radar receiving unit Rx estimates the height and speed of a vehicle which travels on a road surface using a reflected wave signal from the vehicle. A template generating unit 19 generates a variation in a phase component of the reflected wave signal corresponding to N heights and speeds of the vehicle as N templates. N vehicle height/speed template correlation calculation units #1 to #Nrep calculate correlation on the basis of any one of the N templates and a correlation value between the reflected wave signal and a transmission code of the radar transmission signal.
6 Citations
6 Claims
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1. A radar device configured to be installed in a moving body which travels on a road surface, comprising:
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radar transmitting circuitry which, in operation, transmits a radio-frequency radar transmission signal in a horizontal direction from a transmission antenna which is inclined in a predetermined direction; and radar receiving circuitry which, in operation, estimates a distance to a stationary target and an azimuth of the target, using a reflected wave signal which is the radar transmission signal reflected from the target, wherein the radar receiving circuitry includes; correlation calculation circuitry which, in operation, calculates a correlation value between the reflected wave signal and a transmission code of the radar transmission signal; speed detecting circuitry which, in operation, detects a moving speed and a moving direction of the moving body; template generating circuitry which, in operation, calculates a variation in a phase component of the reflected wave signal for each parameter set of N parameter sets of the distance to the target and the azimuth of the target to generate N templates, the azimuth being defined by the moving speed and the moving direction of the moving body; N template correlation calculation circuitry which, in operation, calculates correlation values between the generated N templates and the correlation value output from the correlation calculation circuitry; and output selection circuitry which, in operation, determines a type of the target, using the distance to the target and the azimuth of the target corresponding to any one of the generated N templates, on the basis of outputs from the N template correlation calculation circuitry. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification