Spread spectrum intercept apparatus and method
First Claim
1. An apparatus for detecting an intercept signal having spread spectrum modulation, comprising:
- a first antenna for outputting the intercept signal;
first means for channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively;
a parametric encoder for measuring a corresponding plurality of frequencies of each of the first plurality of segment signals, respectively; and
means for generating from the plurality of frequencies a frequency estimate of the intercept signal.
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Abstract
An apparatus for detecting an intercept signal having spread spectrum modulation, having a first antenna, a second antenna, a first channelizer, a second channelizer, parametric encoders, a spread hopper processor and a nonspread hopper processor. The first antenna outputs a first sample of the intercept signal. The second antenna outputs a second sample of the intercept signal. The first channelizer channelizes the spectrum of the first sample of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively. The second channelizer channelizes the spectrum of the second sample of the intercept signal into a second plurality of spectrum segments having the same center frequencies and bandwidths as the first plurality of spectrum segments. Each spectrum segment of the second plurality of spectrum segments has a corresponding segment signal, respectively. The parametric encoders measure a corresponding plurality of frequencies and times of arrival of each of the first plurality of segment signals, respectively, and estimates a plurality of segment phase angles between corresponding segment signals having the same center frequency, of the first and second plurality of segment signals from the first and second channelizers, respectively.
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Citations
9 Claims
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1. An apparatus for detecting an intercept signal having spread spectrum modulation, comprising:
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a first antenna for outputting the intercept signal; first means for channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively; a parametric encoder for measuring a corresponding plurality of frequencies of each of the first plurality of segment signals, respectively; and means for generating from the plurality of frequencies a frequency estimate of the intercept signal. - View Dependent Claims (2)
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3. An apparatus for detecting an intercept signal having spread spectrum modulation, comprising:
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a first antenna for outputting the intercept signal; first means for channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively; a parametric encoder for measuring a corresponding plurality of times of arrival of each of the first plurality of segment signals; and means for generating from the plurality of times of arrival a time of arrival estimate of the intercept signal.
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4. An apparatus for detecting an intercept signal having spread spectrum modulation, comprising:
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a first antenna for outputting the intercept signal; a channelizer for channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively; a parametric encoder for measuring a corresponding plurality of frequencies of each of the first plurality of segment signals, respectively; and means for generating from the plurality of frequencies a frequency estimate of the intercept signal. - View Dependent Claims (5)
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6. An apparatus for detecting an intercept signal having spread spectrum modulation, comprising:
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a first antenna for outputting the intercept signal; a channelizer for channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively; a parametric encoder for measuring a corresponding plurality of times of arrival of each of the first plurality of segment signals; and means for generating from the plurality of times of arrival a time of arrival estimate of the intercept signal.
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7. An method using a parametric encoder for detecting an intercept signal having spread spectrum modulation, comprising the steps, using said parametric encoder, of:
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outputting from a first antenna the intercept signal; channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively; measuring with said parametric encoder a corresponding plurality of frequencies of each of the first plurality of segment signals, respectively; and generating from the plurality of frequencies a frequency estimate of the intercept signal.
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8. The method as set forth in claim 17 further comprising the steps of:
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measuring with said parametric encoder a corresponding plurality of times of arrival of each of the first plurality of segment signals; and generating from the plurality of times of arrival, a time of arrival estimate of the intercept signal.
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9. A method using a parametric encoder for detecting an intercept signal having spread spectrum modulation, comprising the steps, using said parametric encoder, of:
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outputting from an antenna the intercept signal; channelizing the spectrum of the intercept signal into a first plurality of spectrum segments, with each spectrum segment having a corresponding segment signal, respectively; measuring with said parametric encoder a corresponding plurality of times of arrival of each of the first plurality of segment signals; and generating from the plurality of times of arrival a time of arrival estimate of the intercept signal.
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Specification