System for analyzing time-dependent phenomena
First Claim
1. A system for resolving a data sequence derived from a time-varying signal-generating phenomenon, said system comprising, in combination:
- means for repetitively initiating said phenomenon;
means for detecting signals derived from said phenomenon during the course thereof;
means for sampling said signals during a fixed time increment commencing a predetermined time interval following each initiation of said phenomenon;
means for convolving said sampling of said signals with a transformation;
means for selectively altering the temporal relation between initiation of said phenomenon and convolution of said signals so as to produce a time-ordered set of said samplings in which the sequence of the phenomenon and the convolution is temporally shifted in successive increments with respect to one another; and
means for combining said samplings according to the order of said set so as to synthesize an interferogram representing the convolution with said transformation of the signals from said phenomenon at said fixed time position.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for analyzing a time-varying phenomenon in which the latter is repetitively initiated to provide a train of repetitive output signals. A fast Fourier transform interferometer is provied to scan the train. Data corresponding to a selected temporal resolution element having the same selected time position following initiation of each signal are sampled and the samples coded to improve signal-to-noise ratio. The time relation between a selected retardation point in the interferometer and the initiation of each signal in a given train is successively shifted so as to produce a series of coded data, each datum corresponding to a resolution element occurring at the selected time position but at a different interferometer retardation. The selected data are then assembled in their time sequence to generate a synthetic interferogram. The synthetic interferogram, when inversely transformed, provides the spectrum of the phenomenon as it occurred during the temporal resolution element at the selected time position.
28 Citations
8 Claims
-
1. A system for resolving a data sequence derived from a time-varying signal-generating phenomenon, said system comprising, in combination:
-
means for repetitively initiating said phenomenon; means for detecting signals derived from said phenomenon during the course thereof; means for sampling said signals during a fixed time increment commencing a predetermined time interval following each initiation of said phenomenon; means for convolving said sampling of said signals with a transformation; means for selectively altering the temporal relation between initiation of said phenomenon and convolution of said signals so as to produce a time-ordered set of said samplings in which the sequence of the phenomenon and the convolution is temporally shifted in successive increments with respect to one another; and means for combining said samplings according to the order of said set so as to synthesize an interferogram representing the convolution with said transformation of the signals from said phenomenon at said fixed time position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification