Radar apparatus and target detecting method
AssigneeFujitsu Limited
InventorKazuo SHIRAKAWA
Life of this patent
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Abstract
Provided is a radar apparatus including an envelope detector unit that acquires an envelope component of a signal transmitted from a receiving antenna in at least one combination of a plurality of combinations of transmitting antennas and receiving antennas whose spatial phases become equal to each other in the array antenna; a determination unit that determines an amount of compensation in the at least one combination based on the envelope component acquired by the envelope detector unit; and a compensator unit that compensates a phase of a signal transmitted from each of the receiving antennas before aperture synthesis by using the amount of compensation determined by the determination unit, or compensates a phase of a signal radiated from the transmitting antenna in another combination.
Claims7
A radar apparatus that detects a target by aperture synthesis of signals obtained from receiving antennas in an array antenna having a plurality of antenna elements, each of which is used as at least one of transmitting antennas and receiving antennas, comprising:
- an envelope detector unit that acquires an envelope component of a signal obtained from a receiving antenna in at least one combination of a plurality of combinations of transmitting antennas and receiving antennas whose spatial phases become equal to each other in the array antenna;
- a determination unit that determines an amount of compensation in the at least one combination based on the envelope component acquired by the envelope detector unit;
- and
- a compensator unit that compensates a phase of the signal obtained from each of the receiving antennas before synthesis by using the amount of compensation determined by the determination unit, or compensates a phase of a signal radiated from the transmitting antenna in another combination different from the at least one combination.
A method of detecting a target by aperture synthesis of signals obtained from receiving antennas in an array antenna having a plurality of antenna elements, each of which is used as at least one of transmitting antennas and receiving antennas, comprising:
- acquiring an envelope component of a signal obtained from a receiving antenna in at least one combination of a plurality of combinations of transmitting antennas and receiving antennas whose spatial phases become equal to each other in the array antenna;
- determining an amount of compensation in the at least one combination based on the acquired envelope component;
- and
- compensating a phase of the signal obtained from each of the receiving antennas before synthesis, or compensating a phase of a signal radiated from the transmitting antenna in another combination different from the at least one combination.
Dependencies are inferred from the claim text.