Radar device
AssigneeMitsubishi Electric Corporation
InventorKado Nakagawa
Life of this patent
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Abstract
Provided is a radar device capable of accurately calculating directions and the number of targets. A direction calculation unit includes a correlation matrix addition prohibition unit that prohibits, when a peak frequency in a plurality of modulation periods of a target is in the vicinity of 0, addition of a correlation matrix generated from a peak frequency spectrum having the peak frequency in the vicinity of 0, and calculates the direction of the target on the basis of a summed correlation matrix in which correlation matrices generated from peak frequency spectra having peak frequencies out of the vicinity of 0.
Claims11
A radar device, comprising:
- transmitting means for transmitting a transmitting signal having a plurality of modulation periods;
- receiving means for receiving a reflection signal, resulting from reflection of the transmitting signal by targets, by a plurality of antennas;
- mixing means for mixing the transmitting signal and each of a plurality of received signals received by the receiving means together to obtain a plurality of beat signals;
- frequency analyzing means for analyzing each of the plurality of beat signals in frequency;
- and
- a target detection unit that calculates a direction of the target based on a summed correlation matrix in which correlation matrices generated from peak frequency spectra having peak frequencies in the plurality of modulation periods that do not satisfy a given condition are summed together, according to a plurality of frequency analyzing results obtained by the analyzing of the frequency analyzing means,
- wherein the target detection unit includes a correlation matrix addition prohibition unit that prohibits addition of a correlation matrix generated from a peak frequency spectrum having the peak frequency that satisfies the given condition, when a peak frequency in the plurality of modulation periods satisfies the given condition.
A radar device, comprising:
- transmitting means for transmitting a transmitting signal having a plurality of modulation periods;
- receiving means for receiving a reflection signal, resulting from reflection of the transmitting signal by a target, by a plurality of antennas;
- mixing means for mixing the transmitting signal and each of a plurality of received signals received by the receiving means together to obtain a plurality of beat signals;
- frequency analyzing means for analyzing each of the plurality of beat signals in frequency;
- and
- a target detection unit that calculates a direction of the target based on a summed correlation matrix in which correlation matrices generated from peak frequency spectra having peak frequencies of a plurality of targets in the plurality of modulation periods that fail to satisfy a given condition are summed together, according to a plurality of frequency analyzing results obtained by the analyzing of the frequency analyzing means,
- wherein the target detection unit includes a correlation matrix addition prohibition unit that prohibits addition of a correlation matrix generated from a peak frequency spectrum having the peak frequency that satisfies the given condition, when a peak frequency of the plurality of targets in the plurality of modulation periods satisfies the given condition.
Dependencies are inferred from the claim text.