Power control for improved near-far performance of radar systems
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 continuous wave radio signals, wherein the transmitter is configured to turn ON and transmit during a first time interval of a plurality of time intervals, and configured to turn OFF and not transmit during a second time interval of the plurality of time intervals that is after the first time interval;
a receiver configured for installation and use on the vehicle, and configured to receive continuous wave radio signals, wherein the received radio signals include the transmitted radio signals reflected from targets in the environment;
a processor, wherein the received radio signals are provided to the processor;
wherein the processor processes the received radio signals during the plurality of time intervals, wherein different time intervals of the plurality of time intervals contain different signal levels of radio signals reflected from first and second targets in the environment, wherein the first target is closer than a first threshold distance from the vehicle, and wherein the second target is farther than the first threshold distance from the vehicle; and
wherein, responsive to processing the received radio signals during the plurality of time intervals, the processor selects a particular time interval of the plurality of time intervals that is free of radio signals reflected off of the first target.
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Accused Products
Abstract
A radar system includes a transmitter, a receiver and a processor. The receiver receives radio signal that includes the transmitted radio signal reflected from targets in the environment. The received radio signal is provided to the processor. The processor samples the received radio signal during a plurality of time intervals to produce a sampled stream. The different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from the targets. The processor also selects a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the targets that are closer than a first threshold distance from an equipped vehicle. The transmitter and/or the receiver is adjusted such that samples of radio signals reflected off of targets that are farther than the first threshold distance are detected.
254 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 continuous wave radio signals, wherein the transmitter is configured to turn ON and transmit during a first time interval of a plurality of time intervals, and configured to turn OFF and not transmit during a second time interval of the plurality of time intervals that is after the first time interval; a receiver configured for installation and use on the vehicle, and configured to receive continuous wave radio signals, wherein the received radio signals include the transmitted radio signals reflected from targets in the environment; a processor, wherein the received radio signals are provided to the processor; wherein the processor processes the received radio signals during the plurality of time intervals, wherein different time intervals of the plurality of time intervals contain different signal levels of radio signals reflected from first and second targets in the environment, wherein the first target is closer than a first threshold distance from the vehicle, and wherein the second target is farther than the first threshold distance from the vehicle; and wherein, responsive to processing the received radio signals during the plurality of time intervals, the processor selects a particular time interval of the plurality of time intervals that is free of radio signals reflected off of the first target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. 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 continuous wave radio signals, wherein the transmitter is configured to pulse the transmitted radio signals with a duty cycle that reduces over time; a receiver configured for installation and use on the vehicle, and configured to receive continuous wave radio signals, wherein the received radio signals include the transmitted radio signals reflected from targets in the environment, wherein the targets in the environment comprise first and second targets, wherein the first targets are closer than a first threshold distance from the vehicle, and wherein the second targets are farther than the first threshold distance from the vehicle; wherein the received radio signals are provided to a processor; wherein the processor processes the received radio signals during a plurality of time intervals, and wherein different time intervals of the plurality of time intervals contain different signal levels of radio signals reflected from the targets in the environment; and wherein, responsive to processing the received radio signals during the plurality of time intervals, the processor selects a particular time interval of the plurality of time intervals that is free of radio signals reflected off of the first targets. - View Dependent Claims (20, 21, 22)
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23. 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 continuous wave radio signals; a receiver configured for installation and use on the vehicle, and configured to receive continuous wave radio signals, wherein the received radio signals include the transmitted radio signals reflected from targets in the environment, and wherein the targets in the environment comprise first and second targets, and wherein the first targets are closer than a first threshold distance from the vehicle, and wherein the second targets are farther than the first threshold distance from the vehicle; wherein the receiver receives radio signals during selected time intervals of a plurality of time intervals, and wherein a particular time interval of the plurality of time intervals is free of radio signals reflected from the first targets; wherein the received radio signals are provided to a processor; wherein the processor processes the received radio signals during the plurality of time intervals, and wherein different time intervals of the plurality of time intervals contain different signal levels of radio signals reflected from the targets in the environment. - View Dependent Claims (24, 25)
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Specification