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 a radio signal, wherein the transmitter is further configured to decrease a power level of the transmitted radio signal over a plurality of time intervals;
a receiver configured for installation and use on the vehicle, and configured to receive radio signals, wherein the received radio signals include the transmitted radio signal reflected from targets in the environment;
a processor, wherein the received radio signals are provided to the processor, and wherein the processor is configured to produce a stream of samples from the received radio signals;
wherein the processor is configured to process the stream of samples during the plurality of time intervals, and wherein different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from first and second targets in the environment, and 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 the processor is configured to select a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the first targets.
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Accused Products
Abstract
A radar sensing system includes at least one transmitter, at least one receiver and a processor. The at least one transmitter transmits a power shaped radio signal. The at least one 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.
219 Citations
29 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 a radio signal, wherein the transmitter is further configured to decrease a power level of the transmitted radio signal over a plurality of time intervals; a receiver configured for installation and use on the vehicle, and configured to receive radio signals, wherein the received radio signals include the transmitted radio signal reflected from targets in the environment; a processor, wherein the received radio signals are provided to the processor, and wherein the processor is configured to produce a stream of samples from the received radio signals; wherein the processor is configured to process the stream of samples during the plurality of time intervals, and wherein different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from first and second targets in the environment, and 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 the processor is configured to select a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the first targets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. 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 a radio signal, wherein the transmitter is configured to power shape the transmitted radio signal; a receiver configured for installation and use on the vehicle, and configured to receive radio signals, wherein the received radio signals include the transmitted radio signal 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 received radio signals are provided to a processor; wherein the processor is configured to sample the received radio signals to produce a stream of samples from the received radio signals; wherein the processor is configured to process the stream of samples during a plurality of time intervals, and wherein different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from the targets in the environment; and wherein the processor is configured to select a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the first targets. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. 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 a radio signal during a plurality of time intervals; a receiver configured for installation and use on the vehicle, and configured to receive radio signals, wherein the received radio signals include the transmitted radio signal reflected from first and second targets in the environment, 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 transmitter is configured to at least one of (i) transmit the radio signal on a selected frequency during a selected time interval of the plurality of time intervals, and (ii) power shape the transmitted radio signal such that the transmitted radio signal decreases in power over the plurality of time intervals; wherein the received radio signals are provided to a processor; wherein the processor is configured to sample the received radio signals to produce a stream of samples from the received radio signals; wherein the processor is configured to process the stream of samples during a plurality of time intervals, and wherein different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from the targets in the environment; and wherein the processor is configured to select a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the first targets. - View Dependent Claims (28, 29)
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Specification