Nonuniform frequency spectrum reconfiguration method of orientation multi-beam synthetic aperture radar

• Main Authors: DAI CHUNYANG, ZHOU BAOLIANG, KONG LINGKUN, ZHANG SHUNSHENG
• Format: Patent
• Language: Chinese; English
• Published: 05.05.2010
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a nonumiform frequency spectrum reconfiguration method of an orientation multi-beam synthetic aperture radar, belonging to a processing technology of synthetic aperture radar signals and solving the problems of high imaging false rate and poor imaging quality of nonuniform sampling signals. The method comprises the following steps of: (1) establishing a periodical nonuniform sampling echo signal model; (2) deducing a frequency spectrum reconfiguration algorithm of an orientation multi-beam SAR nonuniform sampling signal based on the FrFT frequency spectrum theory; (3) reestablishing a nonuniform sampling signal frequency spectrum into a uniform sampling signal frequency spectrum; and (4) imaging the uniform sampling signal frequency spectrum and realizing two-dimensional focus imaging of an orientation multi-beam SAR by a CS algorithm. The invention can not only greatly reduce the false rate of the nonuniform sampling signal imaging of the orientation multi-beam synthetic aperture rada