Antenna-rotation compensation apparatus and method for phased ar

Details Antenna-rotation compensation apparatus and method for phased ar Antenna-rotation compensation apparatus and method for phased ar

1990-06-21

1991-07-30

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342174, 342194, 342 81, G01S 178

Patent

active

050363336

ABSTRACT:
Electronic antenna-rotation compensation apparatus is provided for correcting data errors introduced into radar return signals by the rotation of phased array antennas. The apparatus includes circuitry for sampling and A-to-D converting I (in phase) and Q (quadrature) radar return signal components provided by individual antenna elements comprising the array antenna and for providing and applying correction factors to each ith signal components sample from each nth element across the antenna. The correction factors may be precomputed and stored in a memory for use when required or may be computed as needed. The corrected, digital I and Q signal component samples are supplied to a conventional processor, for example, as adaptive array processor, for extracting useful target data from return signal interference and clutter. A corresponding method is provided for compensating for the effects of phased array antenna rotation.

REFERENCES:
patent: 4484194 (1984-11-01), Arvidsson
patent: 4626856 (1986-12-01), Pierson et al.
patent: 4804963 (1989-02-01), Clapham
patent: 4868574 (1989-09-01), Raab
patent: 4947176 (1990-08-01), Inatsune et al.

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