Optical processing for self-cohering of phased-array imaging signals

Robert T. Weverka; Kelvin H. Wagner; Anthony W. Sarto

doi:10.1117/12.138425

2 December 1992 Optical processing for self-cohering of phased-array imaging signals

Robert T. Weverka, Kelvin H. Wagner, Anthony W. Sarto

Proceedings Volume 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III; (1992) https://doi.org/10.1117/12.138425
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

We describe three real-time optical processing systems, for imaging radar, that form the array phase function and produce the radar image from the incoming signals. The first is an implementation of the Steinberg algorithm where we have modified the data format by frequency multiplexing the range information to allow for the data from all range bins to be present simultaneously. The second implementation uses this same input format, but provides hysteresis on the point scatterer used to calibrate the array. This allows for moving radar arrays where the point used to calibrate the array may be time varying. Finally we describe a self oscillating phase conjugate resonator, with a coherent optical to RF converter inside the cavity. This is a hybrid optical-microwave oscillator that adapts to the incoming signal.

Citation Download Citation

Robert T. Weverka, Kelvin H. Wagner, and Anthony W. Sarto "Optical processing for self-cohering of phased-array imaging signals", Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); https://doi.org/10.1117/12.138425

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