Abstract

The Wigner distribution, which is a useful means of signal time-frequency or space-patial-frequency joint representation, has found various applications in communication, signal and image processing, and pattern recognition. For these applications, the design of various optical Wigner-distribution processors has been accomplished. By using linear space-invariant optical elements, the optical Wigner distribution of a real signal can easily be displayed. To process a complex signal, spatial filtering and holographic techniques were also proposed. These techniques usually have operating restrictions that limit their real-time optical-processing applications.

© 1990 Optical Society of America