Bragg-cell application to high probability of intercept receiver
First Claim
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1. A receiver comprising:
- a plurality of half octave filters;
at least one frequency up-converter operable to receive input RF signals from ones of said plurality of filters to produce first IF signals;
at least one frequency down-converter operable to receive input from said first IF signals to produce second IF signals; and
a processor operable to provide analog-to-digital conversion of said second IF signals using acousto-optics, said processor including a laser source and a plurality of lens.
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Abstract
A unique ultra wide band receiver is provided that blends together RF and photonic technologies. The receiver has application as a steering mechanism (600) for a much higher resolution receiver. Some implementations can provide at least four times shorter scanning and processing time than current technology using Bragg-cell technology as a direct replacement for state of the art A/D technology at a high IF frequency conversion rate. The dynamic range offered through use of Bragg-cell processor technology, as used in this IF application, provides greater bandwidth than comparable A/D technology.
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Citations
21 Claims
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1. A receiver comprising:
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a plurality of half octave filters;
at least one frequency up-converter operable to receive input RF signals from ones of said plurality of filters to produce first IF signals;
at least one frequency down-converter operable to receive input from said first IF signals to produce second IF signals; and
a processor operable to provide analog-to-digital conversion of said second IF signals using acousto-optics, said processor including a laser source and a plurality of lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of scanning a range of frequencies for information comprising:
filtering a band of RF frequencies;
up-converting said RF frequency signals to first IF frequency signals;
down-converting said first IF frequency signals to second IF frequency signals;
performing analog-to digital conversion of said second IF signals;
tracking a location corresponding to each band of frequencies at which information is detected;
providing said tracking location information to a signal synthesizer; and
tuning to frequencies at which said information is detected. - View Dependent Claims (10, 11, 12)
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13. A receiver comprising:
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a first stage for up-converting received frequencies to first intermediate frequencies;
a second stage for down-converting said first intermediate frequencies to second intermediate frequencies; and
a third stage comprising a Bragg-cell processor for providing analog-to-digital conversion of information within signals at said second intermediate frequencies. - View Dependent Claims (14, 15)
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16. A receiver comprising:
a Bragg-cell processor, and a synthesizer operable to generate local oscillation signals in connection with converting IF frequency signals for input to said Bragg-cell processor, said synthesizer being further operable to cause said receiver to capture RF information in approximately 1 GHz steps with about 1 GHz bandwidth per step of an output of the synthesizer.
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17. A receiver comprising:
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a plurality of filters comprising a bank of filters for receiving an RF input signal;
a synthesizer having a plurality of outputs, said synthesizer being operable to produce a first and second set of local oscillator (LO) signals, said first set of LO signals each being associated with a filter from said bank of filters;
a frequency up-convert section operable to receive input from said plurality of filters and said synthesizer;
a down-convert section operable to receive input from said frequency up-convert section and said second set of LO signals delivered in stepped output from said synthesizer, a Brag-cell processor operable to receive input from said down-convert section. - View Dependent Claims (18, 19, 20, 21)
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Specification