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US 6,163,276 AGranted
System for remote data collection
AssigneeCellNet Data Systems, Inc.
InventorsClive Russell Irving, Gregory Vincent Luxford, Andrew Gordon Summers, Colin Richard Smithers
Life of this patent
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Abstract
A remote data collection system for collecting usage data from an endpoint includes a monitoring module coupled to the endpoint, the monitoring module having a wireless transmitter to transmit the usage data. The system also includes a receiver to receive usage data from the wireless transmitter of the monitoring module, the receiver capable of receiving in parallel data transmitted at arbitrary frequencies within a radio channel.
Claims11
A remote data collection system for collecting usage data from an endpoint, comprising:
- a monitoring module coupled to the endpoint, the monitoring module having a wireless transmitter to transmit the usage data, the wireless transmitter including:
- a reference oscillator;
- a low pass filter coupled to the reference oscillator;
- a modulation filter to provide an over-sampled modulated signal;
- a synthesizer coupled to the low pass filter and the modulation filter;
- a sine wave generator coupled to the synthesizer;
- and
- an antenna coupled to the sine wave generator;
- and
- a receiver to receive usage data from the wireless transmitter of the monitoring module, the receiver capable of receiving in parallel data transmitted at arbitrary frequencies within a radio channel, including:
- a radio frequency (RF) front end to convert an RF signal to a digitized signal;
- a Fast Fourier Transform (FFT) generator coupled to the RF front-end to separate the digitized signal into a plurality of sub-channels;
- a bank of phase locked loops (PLLs) coupled to the FFT generator, each PLL operating on a sub-channel with a sub-channel center;
- a flag detector coupled to the bank of PLLs to detect variations from the sub-channel center and to recover the usage data transmitted by the end-point;
- and
- a data communication network coupled to the receiver to communicate the usage data from the endpoint to a database.
13 more elements
Dependencies are inferred from the claim text.