초록 ▼

An inverse synthetic array radar (ISAR) system provides for improving the resolution of an ISAR image by providing compensation for non-uniformity in the magnitude of the angular velocity of a rotating target as the target rotates to generate the synthetic-aperture-angle, and enables use of a larger

An inverse synthetic array radar (ISAR) system provides for improving the resolution of an ISAR image by providing compensation for non-uniformity in the magnitude of the angular velocity of a rotating target as the target rotates to generate the synthetic-aperture-angle, and enables use of a larger synthetic-aperture angle, without compromising ISAR image quality with respect to smear. The preferred embodiment records sampled data signals to generate a collected-data matrix indexed in each of two dimensions on the basis of uniform increments of time, and performs data processing to produce a translated data matrix indexed in a dimension on the basis of uniform increments of synthetic-aperture angle. Further processing of the translated data matrix produces data in a buffer for controlling a display device for the ISAR image.

대표청구항 ▼

An inverse synthetic array radar system organized to compensate for non-uniformity in the magnitude of the angular velocity of a rotating target as the target rotates to generate the synthetic-aperture-angle, the system comprising: transmitter means for transmitting toward the target a sequence of r

An inverse synthetic array radar system organized to compensate for non-uniformity in the magnitude of the angular velocity of a rotating target as the target rotates to generate the synthetic-aperture-angle, the system comprising: transmitter means for transmitting toward the target a sequence of radar pulses during a data collection interval; receiver means for producing in-phase and quadrature-phase signals based on radar return from the target; signal converter means for converting the in-phase and quadrature-phase signals to sampled signals; data recording means for using the sampled data signals to generate a collected-data matrix indexed in each of two dimensions on the basis of regular increments of time; first data processing means for processing the collected-data matrix to produce a synthetic-aperture-angle record indexed on the basis of regular increments of time; second data processing means for using the collected-data matrix and the synthetic-aperture-angle record to produce a translated data matrix indexed in a dimension on the basis of uniform increments of synthetic-aperture-angle; display means; and third data processing means for using the translated data matrix to control the display means to generate an image of the rotating target.