SYNTHETIC-APERTURE RADAR SIGNAL PROCESSING APPARATUS
First Claim
1. A synthetic-aperture radar signal processing apparatus comprising:
- an interference phase processor to calculatea first topographic fringe represented by multiple pixels, representing a relative phase between signals contained in two pixels representing a same scatterer in a first set of two synthetic aperture radar images using the first set of two synthetic aperture radar images generated by two sensors having a first baseline length, anda second topographic fringe represented by multiple pixels, representing a relative phase between signals contained in two pixels representing the same scatterer in a second set of two synthetic aperture radar images using the second set of two synthetic aperture radar images generated by two sensors having a second baseline length; and
an extraction processor includinga phase calculator to calculate a first specific phase that corresponds to a scatterer at at least one specific height in the first topographic fringe and a second specific phase that corresponds to the scatterer at said at least one specific height in the second topographic fringe, anda pixel extractor to extract a pixel corresponding to said at least one specific height from the first topographic fringe and the second topographic fringe, the pixel having the first specific phase in the first topographic fringe and the second specific phase in the second topographic fringe, the first and second topographic fringes being calculated by the interference phase processor.
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Abstract
A synthetic-aperture radar signal processing apparatus in accordance with the present invention estimates the height of a scatterer in a synthetic aperture radar image observed at sets of sensors, each corresponding to a baseline length, and extracts a pixel corresponding to the scatterer at the height from the synthetic aperture radar image. The synthetic-aperture radar signal processing apparatus generates a topographic fringe of the synthetic aperture radar image calculates the phase of the topographic fringe that correspond to the specific height, and then extracts a pixel having the phase from the topographic fringe, resulting in the extraction of the pixel at the specific height. This configuration can extract a specific height corresponding to a combination of the phases generated by multiple topographic fringes and measure the height of the scatterer where the two sensors having the shortest baseline determine a measurable height.
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Citations
13 Claims
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1. A synthetic-aperture radar signal processing apparatus comprising:
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an interference phase processor to calculate a first topographic fringe represented by multiple pixels, representing a relative phase between signals contained in two pixels representing a same scatterer in a first set of two synthetic aperture radar images using the first set of two synthetic aperture radar images generated by two sensors having a first baseline length, and a second topographic fringe represented by multiple pixels, representing a relative phase between signals contained in two pixels representing the same scatterer in a second set of two synthetic aperture radar images using the second set of two synthetic aperture radar images generated by two sensors having a second baseline length; and an extraction processor including a phase calculator to calculate a first specific phase that corresponds to a scatterer at at least one specific height in the first topographic fringe and a second specific phase that corresponds to the scatterer at said at least one specific height in the second topographic fringe, and a pixel extractor to extract a pixel corresponding to said at least one specific height from the first topographic fringe and the second topographic fringe, the pixel having the first specific phase in the first topographic fringe and the second specific phase in the second topographic fringe, the first and second topographic fringes being calculated by the interference phase processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification