Radar apparatus
AssigneePanasonic Automotive Systems Co., Ltd.
InventorTakaaki Kishigami
Life of this patent
Estimating the term…
Abstract
Provided is a radar apparatus that detects a target object with high accuracy. The radar apparatus includes: transmission circuitry, which, in operation, alternately outputs a first transmission signal with a first central frequency and a second transmission signal with a second central frequency higher than the first central frequency for each transmission period; and one or a plurality of transmission antennas, which, in operation, transmit the fast transmission signal and the second transmission signal. The second central frequency is higher than a frequency (1+1/Nc) times the first central frequency, where Nc is an integer indicating a number of times of transmission of each of the first transmission signal and the second transmission signal for the each transmission period within a predetermined duration.
Claims18
A radar apparatus, comprising:
- transmission circuitry, which, in operation, outputs a first transmission signal with a first central frequency and a second transmission signal with a second central frequency for each transmission period, the second central frequency being higher than the first central frequency;
- and
- one or a plurality of transmission antennas, which, in operation, transmit the first transmission signal and the second transmission signal, wherein:
- the second central frequency is higher than a frequency (1+1/Nc) times the first central frequency, where Nc is an integer indicating a number of times of transmission of each of the first transmission signal and the second transmission signal for the each transmission period within a predetermined duration.
A radar apparatus, comprising:
- transmission circuitry, which, in operation, gives a Doppler shift amount with intervals to a first transmission signal with a first central frequency and a second transmission signal with a second central frequency, the second central frequency being higher than the first central frequency, the intervals being obtained by unequally dividing a Doppler frequency range based on which a number of times of aliasing of a Doppler frequency is determined;
- and
- a plurality of transmission antennas, which, in operation, transmits the first transmission signal and the second transmission signal each being a signal to which the Doppler shift amount is given, wherein
- the transmission circuitry outputs the first transmission signal and the second transmission signal for each transmission period,
- the second central frequency is higher than a frequency (1+1/Nc) times the first central frequency, where Nc is an integer indicating a number of times of transmission of each of the first transmission signal and the second transmission signal for the each transmission period within a predetermined duration, and
- in a case where the intervals of the Doppler shift amount are
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- where Nt is an integer indicating a number of the plurality of transmission antennas, δ is an integer of one or more, and Trs is a transmission period in which a set of the first transmission signal and the second transmission signal is transmitted, the second central frequency is higher than a frequency
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- times the first central frequency, the intervals being unequally divided.
Dependencies are inferred from the claim text.