Radar apparatus
First Claim
1. A radar apparatus that acquires a target data set of a target near a host vehicle, the radar apparatus comprising:
- a signal processor configured to;
derive the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from an environment including the target;
detect presence of a wall along a current lane in which the host vehicle is traveling;
determine whether or not there is a temporal continuity between a previous target data set and a latest target data set, in a case where there is the latest target data set that has a continuity with the previous target data set, use the latest target data set, and in a case where there is no latest target data set that has the temporal continuity with the previous target data set, use a prediction target data set derived based on the previous target data set as the latest target data set; and
determine, based on a frequency of use of the prediction target data set, whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide, whereineven if there is the latest target data set that has the continuity with the previous target data set, in a case where (i) the target is associated with the previous target data set is a stationary object in the current lane and (ii) the target associated with the latest target data set is within a predetermined threshold distance of the wall, the signal processor uses the prediction target data set instead of the latest target data set.
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Accused Products
Abstract
A radar apparatus includes a signal processor configured to: derive the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from the target; detect, based on the target data set, a side wall along a current lane in which the host vehicle is traveling; determine whether or not there is a continuity between a previous target data set and a latest target data set, and in a case where there is no continuity between the previous target data set and the latest target data set, perform “extrapolation;” determine based on a frequency of the “extrapolation” whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide.
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Citations
12 Claims
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1. A radar apparatus that acquires a target data set of a target near a host vehicle, the radar apparatus comprising:
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a signal processor configured to; derive the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from an environment including the target; detect presence of a wall along a current lane in which the host vehicle is traveling; determine whether or not there is a temporal continuity between a previous target data set and a latest target data set, in a case where there is the latest target data set that has a continuity with the previous target data set, use the latest target data set, and in a case where there is no latest target data set that has the temporal continuity with the previous target data set, use a prediction target data set derived based on the previous target data set as the latest target data set; and determine, based on a frequency of use of the prediction target data set, whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide, wherein even if there is the latest target data set that has the continuity with the previous target data set, in a case where (i) the target is associated with the previous target data set is a stationary object in the current lane and (ii) the target associated with the latest target data set is within a predetermined threshold distance of the wall, the signal processor uses the prediction target data set instead of the latest target data set. - View Dependent Claims (2, 3, 4)
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5. A radar apparatus that acquires a target data set of a target near a host vehicle, the radar apparatus comprising:
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a signal processor configured to; derive the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from an environment including the target; determine whether or not there is a temporal continuity between a previous target data set and a latest target data set, in a case where there is the latest target data set that has a continuity with the previous target data set, use the latest target data set, and in a case where there is no latest target data set that has the temporal continuity with the previous target data set, use a prediction target data set derived based on the previous target data set as the latest target data set; determine, based on a frequency of use of the prediction target data set, whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide, and in a case where;
(1) the target associated with the target data set is a stationary object;
(2) a time to collision of the host vehicle with the target is equal to or less than a threshold; and
(3) there is another vehicle detected between the target and the host vehicle, change a condition that is used to determine whether or not the target associated with target data set is the upper object, so as to increase a probability that the target is determined as the upper object. - View Dependent Claims (6)
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7. A signal processing method of acquiring a target data set of a target near a host vehicle, the signal processing method comprising the steps of:
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(a) a signal processor deriving the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from an environment including the target; (b) the signal processor detecting presence of a wall along a current lane in which the host vehicle is traveling; (c) the signal processor determining whether or not there is a temporal continuity between a previous target data set and a latest target data set, in a case where there is the latest target data set that has a continuity with the previous target data set, use the latest target data set, and in a case where there is no latest target data set that has the continuity with the previous target data set, use a prediction target data set derived based on the previous target data set as the latest target data set; and (d) the signal processor determining, based on a frequency of use of the prediction target data set, whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide, wherein even if there is the latest target data set that has the continuity with the previous target data set, in a case where (i) the target is associated with the previous target data set is a stationary object in the current lane and (ii) the target associated with the latest target data set is within a predetermined threshold distance of the wall, the signal processor uses the prediction target data set instead of the latest target data set. - View Dependent Claims (8, 9, 10)
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11. A signal processing method of acquiring a target data set of a target near a host vehicle, the signal processing method comprising the steps of:
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(a) a signal processor deriving the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from an environment including the target; (b) the signal processor determining whether or not there is a temporal continuity between a previous target data set and a latest target data set, in a case where there is the latest target data set that has a continuity with the previous target data set, use the latest target data set, and in a case where there is no latest target data set that has the temporal continuity with the previous target data set, use a prediction target data set derived based on the previous target data set as the latest target data set; (c) the signal processor determining based on a frequency of use of the prediction target data set whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide, and (d) in the case where;
(1) the target associated with the target data set is a stationary object;
(2) a time to collision of the host vehicle with the target is equal to or less than a threshold; and
(3) there is another vehicle detected between the target and the host vehicle, the signal processor changing a condition that is used by the step (c), to increase a probability that the target is determined as the upper object. - View Dependent Claims (12)
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Specification