Method and system for synchronizing geographically distributed RF sensors using a pair of RF triggering devices
First Claim
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1. A method for synchronizing first and second geographically distributed RF sensors, the method comprising:
- operating the first and second sensors to acquire and store RF data from a source external to said first and second sensors;
operating the first sensor to generate a trigger signal in response to detecting a feature of interest in the RF data acquired by the first sensor;
operating the first sensor to wirelessly transmit the trigger signal;
operating the second sensor to wirelessly receive the trigger signal; and
operating the second sensor to read stored RF data based on a time offset associated with a time difference between the first sensor generating the trigger signal and the second sensor receiving the trigger signal;
wherein said stored RF data is stored for a period of time longer than said time offset.
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Abstract
RF sensors acquire and store RF data in memory. One RF sensor generates a trigger signal when the RF sensor detects a feature of interest in its acquired RF data. The detecting RF sensor wirelessly transmits the trigger signal to the non-detecting RF sensor. The non-detecting RF sensor reads the appropriate RF data from its memory in response to receipt of the trigger signal. The non-detecting RF sensor accesses the appropriate RF data using a time of day when the trigger signal is received and a predetermined time offset.
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Citations
17 Claims
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1. A method for synchronizing first and second geographically distributed RF sensors, the method comprising:
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operating the first and second sensors to acquire and store RF data from a source external to said first and second sensors; operating the first sensor to generate a trigger signal in response to detecting a feature of interest in the RF data acquired by the first sensor; operating the first sensor to wirelessly transmit the trigger signal; operating the second sensor to wirelessly receive the trigger signal; and operating the second sensor to read stored RF data based on a time offset associated with a time difference between the first sensor generating the trigger signal and the second sensor receiving the trigger signal; wherein said stored RF data is stored for a period of time longer than said time offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RF sensor, comprising:
- an RF receiver section operable to receive a trigger signal form another of said RF sensors;
a clock; and
an instrument section comprising a first memory operable to store acquired RF data and a processor operable to read RF data from the first memory using a time offset determined by the trigger signal and a time of day generated by the clock, wherein the stored RF data is stored in the first memory for period of time longer than the time offset. - View Dependent Claims (10, 11, 12)
- an RF receiver section operable to receive a trigger signal form another of said RF sensors;
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13. A system, comprising:
- a first RF sensor operable to detect a feature of interest in acquired RF data and responsively generate and wirelessly transmit a trigger signal; and
a second RF sensor operable to wirelessly receive the trigger signal and responsively read RF data from a memory using a time offset determined by the trigger signal and a time of day generated by a clock, wherein the stored RF data is stored in the first memory for period of time longer than the time offset. - View Dependent Claims (14, 15, 16, 17)
- a first RF sensor operable to detect a feature of interest in acquired RF data and responsively generate and wirelessly transmit a trigger signal; and
Specification