Compressive receiver
AssigneeSanders Associates, Inc.
InventorsChester E. Stromswold, John T. Apostolos, Robert P. Boland, Walter J. Albersheim
Life of this patent
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Abstract
The envelope detector of a compressive receiver is replaced with either a Fourier Transform device or a demodulator such that the output of the dispersive delay line utilized in the receiver is processed to yield the spectrum of the incoming signals and/or the modulation impressed on the incoming signals, thus to permit rapid identification of a signal and its source. In order to permit spectral analysis and/or demodulation of many signals over wide bandwidths, an especially wide bandwidth dispersive delay line is utilized along with a sweep-to-sweep phase coherent variable frequency oscillator.
Claims13
An augmented compressive receiver system for processing the output of a compressive receiver that splits an incoming frequency band into a band of frequency bins, in which narrow band signals of interest might appear, wherein said compressive receiver is of the type that includes:
- a delay line for time compressing the signals in the frequency band;
- and
- gating means for selectively sampling at adequate sample rates the output of said delay line at regular intervals corresponding to a frequency bin on which narrow band signals of interest have appeared, and wherein said augmented compressive receiver comprises:
- (a) means for recovering the signal of interest outputted by said gating means so that a spectrum analysis and/or a demodulation may be performed on the signals of interest;
- (b) means for converting the output of said delay line into in-phase (I) and quadrature (Q) base band signals;
- and
- (c) sampling means for periodically sampling the I and Q outputs of said converting means at times corresponding to frequency bins on which narrow band signals of interest have appeared;
- whereby said augmented compressive receiver processes each frequency bin to determine the spectral content of said signals.
Dependencies are inferred from the claim text.