Signal processing apparatus, signal processing method, and non-transitory computer readable medium
AssigneeNEC Corporation
InventorTaichi TANAKA
Life of this patent
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Abstract
This signal processing device performs Fourier transform on a reflection signal into first signal data. The reflection signal represents reflection from a scatterer with respect to radar emitted from a flying object. The signal processing device calculates each phase of second signal data after Fourier transform on the reflection signal when the radar is virtually emitted to plurality of reference points, interpolating the first signal data by using interpolation formula generated using with the phase of second signal data, and performing inverse Fourier transform.
Claims19
A signal processing apparatus comprising:
- a memory configured to store instructions;
- and
- a processor configured to execute the instructions to:
- perform Fourier transform on a reflection signal into first signal data in a frequency domain, the reflection signal representing reflection from a scatterer with respect to radar emitted from a flying object;
- generate a plurality of reference points arranged in a direction obliquely inclined with respect to a direction perpendicular to a traveling direction of the flying object in a plane defined by the traveling direction and an emission direction in which the flying object emits the radar;
- calculate each phase of second signal data in the frequency domain after Fourier transform on the reflection signal when the radar is virtually emitted to the plurality of reference points;
- generate an interpolation formula by using each phase of the second signal data calculated by the calculation means;
- and
- interpolate the first signal data transformed by using the interpolation formula, and performing inverse Fourier transform.
A signal processing method comprising:
- by one or more computers,
- performing Fourier transform on a reflection signal into first signal data in a frequency domain, the reflection signal representing reflection from a scatterer with respect to radar emitted from a flying object;
- generating a plurality of reference points arranged in a direction obliquely inclined with respect to a direction perpendicular to a traveling direction of the flying object in a plane defined by the traveling direction and an emission direction in which the flying object emits the radar;
- calculating each phase of second signal data in the frequency domain after Fourier transform on the reflection signal when the radar is virtually emitted to the plurality of reference points;
- generating an interpolation formula by using each phase of the second signal data;
- and
- interpolating the first signal data by using the interpolation formula, and performing inverse Fourier transform.
A non-transitory computer-readable medium recording a program for causing a computer to execute:
- a procedure of performing Fourier transform on a reflection signal into first signal data in a frequency domain, the reflection signal representing reflection from a scatterer with respect to radar emitted from a flying object;
- a procedure of generating a plurality of reference points arranged in a direction obliquely inclined with respect to a direction perpendicular to a traveling direction of the flying object in a plane defined by the traveling direction and an emission direction in which the flying object emits the radar;
- a procedure of calculating each phase of second signal data in the frequency domain after Fourier transform on the reflection signal when the radar is virtually emitted to the plurality of reference points;
- a procedure of generating an interpolation formula by using each phase of the second signal data;
- and
- a procedure of interpolating the first signal data by using the interpolation formula, and performing inverse Fourier transform.
Dependencies are inferred from the claim text.