Adaptive transmission and interference cancellation for MIMO radar
First Claim
1. A method for mitigating self-interference in a radar system for a vehicle, the method comprising:
- providing a radar system comprising (i) a plurality of transmitters configured for installation and use on a vehicle and configured to transmit radio signals, and (ii) 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;
transmitting radio signals with only a first transmitter of the plurality of transmitters and receiving radio signals transmitted from the first transmitter with at least one receiver of the plurality of receivers;
correlating the received radio signals with each receiver of the at least one receiver to estimate interference that the first transmitter will represent at each receiver of the at least one receiver; and
mitigating at each receiver of the at least one receiver the estimated interference that is due to interfering radio signals transmitted by the first transmitter.
1 Assignment
0 Petitions
Accused Products
Abstract
A radar system has different modes of operation. In one mode the radar operates as a single-input, multiple-output (SIMO) radar system utilizing one transmitted signal from one antenna at a time. Codes with known excellent autocorrelation properties are utilized in this mode. At each receiver the response after correlating with various possible transmitted signals is measured in order to estimate the interference that each transmitter will represent at each receiver. The estimated effect of the interference from one transmitter on a receiver that correlates with a different code is used to mitigate the interference. In another mode, the radar operates as a MIMO radar system utilizing all the antennas at a time. Interference cancellation of the non-ideal cross correlation sidelobes when transmitting in the MIMO mode are employed to remove ghost targets due to unwanted sidelobes.
237 Citations
30 Claims
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1. A method for mitigating self-interference in a radar system for a vehicle, the method comprising:
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providing a radar system comprising (i) a plurality of transmitters configured for installation and use on a vehicle and configured to transmit radio signals, and (ii) 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; transmitting radio signals with only a first transmitter of the plurality of transmitters and receiving radio signals transmitted from the first transmitter with at least one receiver of the plurality of receivers; correlating the received radio signals with each receiver of the at least one receiver to estimate interference that the first transmitter will represent at each receiver of the at least one receiver; and mitigating at each receiver of the at least one receiver the estimated interference that is due to interfering radio signals transmitted by the first transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A radar sensing system for a vehicle, the radar sensing system comprising:
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a transmit pipeline configured for installation and use on a vehicle, wherein the transmit pipeline comprises a plurality of transmitters configured to transmit radio signals; a receive pipeline configured for installation and use on the vehicle, wherein the receive pipeline comprises a plurality of receivers configured to receive radio signals that include the transmitted radio signals reflected from objects in the environment; a controller configured to direct during a first operational mode only a first transmitter of the plurality of transmitters to transmit, wherein radio signals transmitted from only the first transmitter are received by at least one receiver of the plurality of receivers; wherein, during the first operational mode, each receiver of the at least one receiver is configured to correlate the received radio signals to estimate interference that the first transmitter will represent at each receiver of the at least one receiver; and wherein, during a second operational mode, each receiver of the at least one receiver is configured to mitigate the estimated interference that is due to the interfering radio signals transmitted by the first transmitter. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 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 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; a controller configured to direct during a first operational mode the plurality of transmitters and the plurality of receivers to operate in a single-input, multiple-output mode, wherein, during the first operational mode, at least a first portion of transmitters of the plurality of transmitters individually transmits in sequence, each during a separate period of time, and wherein the sequence of transmitted radio signals is received by a first portion of receivers of the plurality of receivers; wherein, during the first operational mode, each receiver of the first portion of receivers is configured to correlate the received radio signals to estimate interference that each individual transmitter of the first portion of transmitters will represent at each receiver of the first portion of receivers; and wherein the controller is configured to direct during a second operational mode the plurality of transmitters and the plurality of receivers to operate in a multiple-input, multiple-output mode, wherein, during the second operational mode, each receiver of the first portion of receivers is configured to mitigate the estimated interference that is due to the interfering radio signals transmitted by each individual transmitter of the first portion of transmitters. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification