Interferometer-type radar
First Claim
1. An interferometer-type radar comprising:
- a transmitter for transmitting a signal to a target; and
a receiver for receiving a reflection signal reflected from the target, wherein the transmitter has a function of outputting a CW signal for detecting direction and velocity of the target from a transmitting antenna, and the receiver has;
a function of receiving a reflection signal reflected from the target with a plurality of receiving antennas at a same time as transmitting from the transmitter, performing spectral analysis with respect to receiving signals, and classifying the receiving signals by velocity component;
a function of performing correlation processing between signals of receiving antenna systems;
a function of integrating signals which have been correlation-processed; and
a function of performing two-dimensional FFT to an output which has been integration-processed, and measuring an direction and the velocity of the target.
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Accused Products
Abstract
A transmitter for transmitting signals to targets and a receiver for receiving signals reflected from targets are included. The transmitter outputs CW signals for detecting direction and velocity of the target. The receiver performs: a function of receiving signals reflected from targets with a plurality of receiving antennas at the same time as transmitting from the transmitter, and performing spectral analysis with respect to receiving signals to thereby classify them by velocity component; a function of correlating signals of the receiving antenna systems; a function of integrating the signals correlation-processed; and a function of obtaining phase fronts of signals made incident on an antenna face from the phase differences of signals between receiving antennas, and performing two-dimensional FFT to the outputs to thereby measure the direction and velocity of the target.
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Citations
11 Claims
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1. An interferometer-type radar comprising:
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a transmitter for transmitting a signal to a target; and
a receiver for receiving a reflection signal reflected from the target, wherein the transmitter has a function of outputting a CW signal for detecting direction and velocity of the target from a transmitting antenna, and the receiver has;
a function of receiving a reflection signal reflected from the target with a plurality of receiving antennas at a same time as transmitting from the transmitter, performing spectral analysis with respect to receiving signals, and classifying the receiving signals by velocity component;
a function of performing correlation processing between signals of receiving antenna systems;
a function of integrating signals which have been correlation-processed; and
a function of performing two-dimensional FFT to an output which has been integration-processed, and measuring an direction and the velocity of the target. - View Dependent Claims (5, 7, 9)
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2. An interferometer-type radar comprising:
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a transmitter for transmitting a signal to a target; and
a receiver for receiving a reflection signal reflected from the target, wherein the transmitter has a function of outputting a FMCW signal for detecting and velocity of the target from a transmitting antenna, and the receiver has;
a function of receiving a reflection signal reflected from the target with a plurality of receiving antennas at a same time as transmitting from the transmitter, performing spectral analysis with respect to receiving signals which are frequency-converted with a signal same as a transmitting signal of FMCW, and classifying the receiving signals by distance component;
a function of performing correlation processing between signals of receiving antenna systems;
a function of integrating signals which have been correlation-processed; and
a function of performing two-dimensional FFT to an output which has been integration-processed and measuring the direction and the velocity of the target. - View Dependent Claims (3, 4, 6, 8, 10)
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11. An interferometer-type radar comprising:
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a transmitter for transmitting a signal which is changed by a constant frequency change rate k and repeated in a cycle T;
a receiver having a heterodyne function in which a signal reflected from a target is frequency-converted with a local origination signal, of a timing completely same as a transmitting signal or a timing which is phase-synchronized, which is changed by a frequency change rate k and repeated in a cycle T; and
an A/D converter for digitizing with a sample frequency F (F=kT) which is a product of the k and T.
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Specification