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Resolution and synthetic aperture characterization of sparse radar arrays
Stiles, James Marion Goodman, Nathan A.
Stiles, James Marion
Goodman, Nathan A.
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Abstract
The concept of radar satellite constellations, or clusters, for synthetic aperture radar (SAR), moving target indicator (MTI), and other radar modes has been proposed and is currently under research. These constellations form an array that is sparsely populated and irregularly spaced; therefore, traditional matched filtering is inadequate for dealing with the constellation's radiation pattern. To aid in the design, analysis, and signal processing of radar satellite constellations and sparse arrays in general, the characterization of the resolution and ambiguity functions of such systems is investigated. We project the radar's received phase history versus five sensor parameters: time, frequency, and three-dimensional position, into a phase history in terms of two eigensensors that can be interpreted as the dimensions of a two-dimensional synthetic aperture. Then, the synthetic aperture expression is used to derive resolution and the ambiguity function. Simulations are presented to verify the theory.
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Date
2003-07
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Keywords
Telecommunications, Aerospace engineering, Electrical & electronic engineering
Citation
Goodman, NA; Stiles, JM. Resolution and synthetic aperture characterization of sparse radar arrays. IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS. July 2003. 39(3): 921-935.