<title>Optical And Analog Electronic Signal Processing</title>

Abstract

A two lens optical Fourier transformation is shown to be equivalent to an electronic chirp transform. For discrete time signals this transformation becomes the discrete chirp-z-transform. The chirp-z-transform can be implemented using either charge transfer devices or surface acoustic wave devices. Through the use of appropriate architectures, a long one-dimensional chirp-z-transform can be rewritten as a modular chirp-z transform using both charge transfer devices and surface acoustic wave devices. Thus in a manner similar to the means by which a two-dimensional lens system can process large one-dimensional signals, so a combination of electronic components configured as a modular chirp-z-transform can process the same signal without the need for an optical system.