Neural network-based radar system
AssigneesNidec Elesys Corporation, National University Corporation Shizuoka University
InventorsHiroyuki KAMO, Yoshihiko KUWAHARA
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Abstract
A radar system includes an array antenna including antenna elements that each output a reception signal in response to one or plural arriving waves, and a signal processing circuit in which a learned neural network has been established. The signal processing circuit receives the reception signals, inputs the reception signals or a secondary signal generated from the reception signals to the neural network, performs computation by using the reception signals or secondary signal and learned data of the neural network, and outputs a signal indicating the number of arriving waves from the neural network.
Claims38
A radar system comprising:
- an array antenna including a plurality of antenna elements each of which outputs a reception signal in response to at least one arriving wave;
- and
- a signal processing circuit in which a learned neural network has been established;
- wherein
- the signal processing circuit:
- receives the reception signals;
- inputs the reception signals or a secondary signal generated from the reception signals, to the neural network;
- performs computation by using the reception signals or the secondary signal, and data of the learned neural network;
- and
- output a signal indicating a number of the at least one arriving wave from the neural network.
A radar signal processing apparatus to be mounted in a driver's vehicle, the radar signal processing apparatus comprising:
- a first terminal to acquire, from an array antenna including a plurality of antenna elements each of which outputs a reception signal in response to at least one arriving wave, the reception signals;
- a signal processing circuit in which a learned neural network has been established;
- and
- a second terminal to transmit a signal which is output from the signal processing circuit;
- wherein
- the signal processing circuit:
- receives the reception signals via the first terminal;
- inputs the reception signals or a secondary signal generated from the reception signals to the learned neural network;
- performs computation by using the reception signals or secondary signal and data of the learned neural network;
- and
- outputs a signal indicating a number of the at least one arriving wave from the learned neural network.
A vehicle travel controlling method comprising:
- acquiring reception signals by using an array antenna including a plurality of antenna elements each of which outputs a reception signal in response to at least one arriving wave;
- inputting the reception signals or a secondary signal generated from the reception signals to a signal processing circuit in which a learned neural network has been established;
- performing computation in the signal processing circuit by using the reception signals or secondary signal and data of the learned neural network;
- outputting a signal indicating a number of the at least one arriving wave from the learned neural network;
- by using the reception signals, outputting signals respectively indicating distances between a driver's vehicle and at least one preceding vehicle in a driver's lane and in a lane adjacent to the driver's lane as corresponding to the at least one arriving wave and a relative velocity of the at least one preceding vehicle;
- and
- performing adaptive cruise control of the driver's vehicle by using the signals respectively indicating a distance, a relative velocity, and a number of the least one arriving wave to control a velocity of the driver's vehicle.
A non-transitory computer-readable medium having stored thereon a computer program to be executed by a signal processing circuit mounted in a vehicle, the vehicle including an array antenna including a plurality of antenna elements each of which outputs a reception signal in response to at least one arriving wave, the computer program causing the signal processing circuit to:
- receive the reception signals;
- input the reception signals or a secondary signal generated from the reception signals to a learned neural network;
- perform computation by using the reception signals or secondary signal and data of the learned neural network;
- and
- output a signal indicating a number of the at least one arriving wave from the learned neural network.
A radar system to be mounted in a driver's vehicle, the radar system comprising:
- an array antenna including a plurality of antenna elements each of which outputs a reception signal in response to at least one arriving wave;
- and
- a signal processing circuit in which a learned neural network has been established;
- wherein
- the neural network has completed learning in a situation where other vehicles respectively exist in two adjacent lanes of a same direction as a direction of travel of the driver's vehicle and in a situation where none of the other vehicles exist, by using non-diagonal components of a spatial covariance matrix which is respectively generated in each situation using the reception signals from the array antenna and by using a training signal indicating a spatial distribution of vehicles in the lanes in each situation;
- and
- the signal processing circuit:
- receives the reception signals;
- inputs the reception signals or a secondary signal generated from the reception signals to the learned neural network;
- and
- as an output from the learned neural network, outputs a signal indicating whether any vehicle exists in each of the two adjacent lanes or not.
Dependencies are inferred from the claim text.