Adaptive radio frequency wakeup detection
First Claim
1. A method of detecting the broadcasting of an RF message from a remote transmitter to an in-vehicle receiver, said RF message including an initial preamble having a plurality of pulses, said method comprising the steps of:
- providing power to said receiver for a first predetermined period of time;
counting a number of preamble pulses received during said first predetermined period of time; and
determining whether said number of preamble pulses received during said first predetermined period of time are between a first predetermined number of preamble pulses and a second predetermined number of preamble pulses;
if said number of preamble pulses are greater than said first predetermined number of preamble pulses, then power is automatically provided to said receiver for processing said RF message;
if said number of preamble pulses are less than said second predetermined number of preamble pulses, then automatically terminating power to said receiver after said first predetermined period of time; and
if said number of preamble pulses are between said first predetermined number of preamble pulses and said second predetermined number of preamble pulses, then extending said power to said receiver for an extended period of time.
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Accused Products
Abstract
A method is provided for detecting the broadcasting of a RF message from a remote transmitter to an in-vehicle receiver. The RF message includes an initial preamble having a plurality of pulses. Power is provided to the receiver for a first predetermined period of time. The preamble pulses received are counted. A determination is made whether the number of preamble pulses received is between a first and second predetermined number of preamble pulses. If the number of preamble pulses is greater than the first predetermined number of preamble pulses, then power is provided to the receiver for processing the RF message. If the number of preamble pulses is less than the second predetermined number of preamble pulses, then power is terminated to the receiver. If the number of preamble pulses are between the first and second predetermined number of preamble pulses, then power is extended to the receiver for an extended period of time.
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Citations
20 Claims
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1. A method of detecting the broadcasting of an RF message from a remote transmitter to an in-vehicle receiver, said RF message including an initial preamble having a plurality of pulses, said method comprising the steps of:
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providing power to said receiver for a first predetermined period of time;
counting a number of preamble pulses received during said first predetermined period of time; and
determining whether said number of preamble pulses received during said first predetermined period of time are between a first predetermined number of preamble pulses and a second predetermined number of preamble pulses;
if said number of preamble pulses are greater than said first predetermined number of preamble pulses, then power is automatically provided to said receiver for processing said RF message;
if said number of preamble pulses are less than said second predetermined number of preamble pulses, then automatically terminating power to said receiver after said first predetermined period of time; and
if said number of preamble pulses are between said first predetermined number of preamble pulses and said second predetermined number of preamble pulses, then extending said power to said receiver for an extended period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control system for detecting the broadcast of a RF message from a remote transmitter to a receiver disposed in a vehicle-based module, said system comprises:
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a receiver for receiving said RF message, said RF message including an initial preamble having a plurality of pulses;
a first controller including a counter for determining a number of preamble pulses received during said a first predetermined period, said first controller providing power to said receiver during said first predetermined period of time;
wherein power is automatically provided to said receiver for processing said RF message if said number of pulses is greater than said first predetermined number of preamble pulses;
wherein power is automatically terminated to said receiver after said first predetermined period of time if said number of preamble pulses are less than said second predetermined number of preamble pulses; and
wherein power is extended to said receiver for an extended period of time if said number of preamble pulses are between said first predetermined number of preamble pulses and said second predetermined number of preamble pulses. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification