Optical: systems and elements – Optical computing without diffraction
Patent
1998-07-06
2000-07-18
Bacares, Rafael
Optical: systems and elements
Optical computing without diffraction
359191, H04B 1006
Patent
active
060915226
ABSTRACT:
An ultra-wideband signal processor, such as that employed for processing narrow time domain radar return pulses, includes a coherent acousto-optic Bragg cell channelizer having a plurality of IF outputs from which a plurality of IF output signals respectively representative of energy content of respectively different frequency portions of the RF input signal are derived. A summing circuit is coupled to sum the IF output signals to produce a summation signal representative of their average energy content. This average energy signal is compared with a threshold to determine if the input signal is a valid RF signal. A delay circuit delays a selected one of the IF output channels by a time sufficient to accommodate summation of the channelizer outputs and determining whether a valid RF signal is present. A digital signal processor processes the delayed selected output signal in response to the summation signal exceeding the threshold.
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Hollingsworth Norman C.
Koontz Mark D.
Morse Randall K.
Snawerdt, III Peter F.
Bacares Rafael
Harris Corporation
Wands Charles E.
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