Digital receiver techniques in radar detectors
First Claim
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1. A method of detecting a RADAR signal, comprising:
- a. receiving a RADAR signal in a police RADAR frequency range, into a heterodyne receiver utilizing a local oscillator, the heterodyne receiver frequency shifting the RADAR signal to a baseband;
b. sampling the RADAR signal in the baseband with an analog to digital converter to produce a time domain sampled representation of the baseband RADAR signal;
c. wherein a frequency of the local oscillator is not swept during the steps of receiving and sampling the RADAR signal;
d. analyzing the time domain sampled representation of the baseband RADAR signal to identify an apparent police originated signal in a police RADAR frequency range;
e. alerting to the present of the apparent police originated signal.
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Abstract
A method and apparatus are provided for detecting a RADAR signal. RADAR channel data in a frequency range is received, where the frequency range is divided into a plurality of equally wide channels. The received RADAR channel data is digitally processed and analyzed to identify a signal in the RADAR channel data in the frequency range. The frequency range is advanced to a next channel of the plurality of channels, where the frequency range of the next channel of the plurality of channels is nonsequential with the frequency range of the first channel. The steps of receiving, processing, and analyzing are repeated for the next channel of the plurality of channels.
57 Citations
18 Claims
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1. A method of detecting a RADAR signal, comprising:
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a. receiving a RADAR signal in a police RADAR frequency range, into a heterodyne receiver utilizing a local oscillator, the heterodyne receiver frequency shifting the RADAR signal to a baseband; b. sampling the RADAR signal in the baseband with an analog to digital converter to produce a time domain sampled representation of the baseband RADAR signal; c. wherein a frequency of the local oscillator is not swept during the steps of receiving and sampling the RADAR signal; d. analyzing the time domain sampled representation of the baseband RADAR signal to identify an apparent police originated signal in a police RADAR frequency range; e. alerting to the present of the apparent police originated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for detecting a RADAR signal, comprising:
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a. a heterodyne receiver receiving a RADAR signal in a police RADAR frequency range, comprising a local oscillator and a mixer using the local oscillator to frequency shift the RADAR signal to a baseband; b. an analog to digital converter sampling the RADAR signal in the baseband to produce a time domain sampled representation of the baseband RADAR signal wherein a frequency of the local oscillator is not swept during the steps of receiving and sampling the RADAR signal; and c. a processor analyzing the time domain sampled representation of the baseband RADAR signal to identify an apparent police originated signal in a police RADAR frequency range. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification