title: Acousto-optic processors for real-time generation of time-frequency representations.
abstract: Acousto-optic processors for calculating different two-dimensional (2-D) time-frequency representations for one dimensional temporal signals in real time are described. The various 2-D representations discussed in the literature, such as the Wigner distribution and the ambiguity function, are shown to be obtainable through minor variations in an acousto-optic processor consisting of two Bragg cells in a parallel configuration. Also obtained and discussed are two new time-frequency representations that, for amplitude-modulated signals, correspond to mean-frequency-selective correlation and Doppler-frequency-selective convolution. Experimental results are presented to highlight the special features of the different time-frequency representation.
authors.forename: R A
authors.initials: RA
authors.lastname: Athale
authors.forename: J N
authors.initials: JN
authors.lastname: Lee
authors.forename: E L
authors.initials: EL
authors.lastname: Robinson
authors.forename: H H
authors.initials: HH
authors.lastname: Szu