Signal Coherence Recovery Using Acousto-Optic Fourier Transform Architectures
Abstract
The X-ray Astronomy Branch at the Naval Research Laboratory is pursuing a program to develop a program for optical computing devices for fast processing of data in ground- and space-based applications. We have implemented a prototype one-dimensional time-integrating acousto-optic (AO) Fourier transform processor, Mark I. We have designed and built a two-dimensional hybrid (space- and time-integrating) Fourier transform processor, Mark II, that provides much higher frequency processing bandwidth, much larger dynamic range, improved signal to noise, and greatly increased speed. We describe a theory of optimum coherence recovery (CR) applicable in computation-limited environments. We have demonstrated direct acousto-optic implementation of CR in Mark I and have proven analytically that the algorithm is realizable in Mark II system. Mark I and II have immediate astronomical relevance, e.g., for existing gravitational wave experiments, in searches for binary millisecond pulsars in the radio and X-ray bands, and in the search for extraterrestrial intelligence, as well as possible application to various signal detection problems in seismology and underwater acoustic signal reception. Acoustooptics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 14, 1990
- Accession Number
- ADA223354
Entities
People
- J. P. Norris
- K. S. Wood
- W. Smathers Jr.
Organizations
- United States Naval Research Laboratory