Successive signal interference mitigation
First Claim
1. A radar sensing system for a vehicle, the radar sensing system comprising:
- a transmitter configured for installation and use on a vehicle, and configured to transmit radio signals;
a receiver configured for installation and use on the vehicle, and configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment;
an interference mitigation processor;
wherein the receiver is configured to process and digitize the received radio signals to produce a sample stream;
wherein the sample stream is provided to the interference mitigation processor;
wherein the interference mitigation processor is configured to successively (i) generate respective signals corresponding to selected signals of the received radio signals that are the transmitted radio signals reflected from respective ones of a selected plurality of objects, and (ii) add the respective signals to the sample stream to form a modified sample stream, and wherein the addition of the respective signals removes from the sample stream those selected signals that are the transmitted radio signals reflected from the selected plurality of objects; and
wherein the receiver is configured to use the modified sample stream to detect a first object at a first range which is more distant than respective ranges of the selected plurality of objects because interfering radio signals, which are the transmitted radio signals reflected from the selected plurality of objects, have been removed from the modified sample stream.
1 Assignment
0 Petitions
Accused Products
Abstract
A radar system for a vehicle includes a transmitter, a receiver, and an interference mitigator. The transmitter transmits radio signals. The receiver receives radio signals. The received radio signals include transmitted radio signals reflected from objects. The receiver also processes the received radio signals to produce a sample stream. The interference mitigator successively (i) generates respective signals corresponding to the transmitted radio signals that are reflected from each of a plurality of objects, and (ii) adds the respective signals to the sample stream to form a modified sample stream. The addition of the respective signals removes interference from the sample stream due to the transmitted radio signals reflected from the plurality of objects. The receiver is configured to use the modified sample stream to detect a first object at a first range which is more distant than respective ranges of the plurality of objects.
268 Citations
25 Claims
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1. A radar sensing system for a vehicle, the radar sensing system comprising:
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a transmitter configured for installation and use on a vehicle, and configured to transmit radio signals; a receiver configured for installation and use on the vehicle, and configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment; an interference mitigation processor; wherein the receiver is configured to process and digitize the received radio signals to produce a sample stream; wherein the sample stream is provided to the interference mitigation processor; wherein the interference mitigation processor is configured to successively (i) generate respective signals corresponding to selected signals of the received radio signals that are the transmitted radio signals reflected from respective ones of a selected plurality of objects, and (ii) add the respective signals to the sample stream to form a modified sample stream, and wherein the addition of the respective signals removes from the sample stream those selected signals that are the transmitted radio signals reflected from the selected plurality of objects; and wherein the receiver is configured to use the modified sample stream to detect a first object at a first range which is more distant than respective ranges of the selected plurality of objects because interfering radio signals, which are the transmitted radio signals reflected from the selected plurality of objects, have been removed from the modified sample stream. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radar sensing system for a vehicle, the radar sensing system comprising:
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a transmitter configured for installation and use on a vehicle, and configured to transmit radio signals; a receiver configured for installation and use on the vehicle, and configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment; an interference mitigation processor; wherein the receiver is configured to process and digitize the received radio signals to produce a sample stream; wherein the sample stream is provided to the interference mitigation processor; wherein the interference mitigation processor is configured to successively (i) generate respective signals corresponding to selected signals of the received radio signals that are the transmitted radio signals reflected from respective ones of a selected plurality of objects, and (ii) add the respective signals to the sample stream to form a modified sample stream, and wherein the addition of the respective signals removes from the sample stream those selected signals that are the transmitted radio signals reflected from the selected plurality of objects; wherein the receiver is configured to use the modified sample stream to detect a first object at a first range which is more distant than respective ranges of the selected plurality of objects; and wherein the interference mitigation processor only modifies the sample stream for transmitted radio signals reflected from objects at ranges that are greater than a first threshold range value, and wherein the interference mitigation processor is bypassed for the effect of transmitted radio signals reflected from objects that are at ranges below a second threshold range value. - View Dependent Claims (9)
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10. A radar sensing system for a vehicle, the radar sensing system comprising:
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a plurality of transmitters configured for installation and use on a vehicle, and configured to transmit radio signals; a plurality of receivers configured for installation and use on the vehicle, and configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment; an interference mitigation processor; wherein a first receiver of the plurality of receivers is configured to process and digitize the received radio signals to produce a sample stream; wherein the sample stream is provided to the interference mitigation processor; wherein the interference mitigation processor is configured to successively (i) generate respective signals corresponding to selected signals of the received radio signals that are the transmitted radio signals reflected from a first object at a first selected range, and (ii) add the respective signals to the sample stream to form a modified sample stream, and wherein the addition of the respective signals removes from the sample stream those selected signals that are the transmitted radio signals reflected from the first object; and wherein the first receiver is configured to use the modified sample stream to detect a second object at a second range that is more distant than the first range of the first object because interfering radio signals, which are the transmitted radio signals reflected from the first object, have been removed from the modified sample stream. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. A radar sensing system for a vehicle, the radar sensing system comprising:
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a plurality of transmitters configured for installation and use on a vehicle, and configured to transmit radio signals; a plurality of receivers configured for installation and use on the vehicle, and configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment; an interference mitigation processor; wherein a first receiver of the plurality of receivers is configured to process and digitize the received radio signals to produce a sample stream; wherein the sample stream is provided to the interference mitigation processor; wherein the interference mitigation processor is configured to successively (i) generate respective signals corresponding to selected signals of the received radio signals that are the transmitted radio signals reflected from a first object at a first selected range, and (ii) add the respective signals to the sample stream to form a modified sample stream, and wherein the addition of the respective signals removes from the sample stream those selected signals that are the transmitted radio signals reflected from the first object; wherein the first receiver is configured to use the modified sample stream to detect a second object at a second range that is more distant than the first range of the first object; and wherein the interference mitigation processor is configured to only modify the sample stream for transmitted signals reflected from objects at ranges that are greater than a first threshold range value.
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21. A method for removing interference from a radio signal received by a vehicle radar sensing system, said method comprising:
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providing a transmitter for installation and use on a vehicle, wherein the transmitter is configured to transmit radio signals; providing a receiver configured for installation and use on the vehicle and configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment; processing the received radio signals to produce a sample stream; successively (i) generating respective signals corresponding to the transmitted radio signals that are reflected from respective ones of a selected plurality of objects, and (ii) adding the respective signals to the sample stream to form a modified sample stream, wherein the addition of the respective signals removes from the sample stream those signals that correspond to the transmitted radio signals reflected from the selected plurality of objects; and using the modified sample stream, detecting a first object at a first range which is more distant than respective ranges of the selected plurality of objects because interfering radio signals, which are the transmitted radio signals reflected from the selected plurality of objects, have been removed from the modified sample stream. - View Dependent Claims (22, 23, 24, 25)
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Specification