Signal recognition for combined receiver for remote keyless entry and tire pressure monitoring systems
First Claim
1. A method of operating a receiver comprising the steps of:
- a) receiving a first amplitude shift keyed wake up portion as part of a first signal that initiates operation of the receiver;
b) receiving a second amplitude shift keyed wake up portion as part of a second signal, wherein a baud rate of the first amplitude shift keyed wake up portion is different than a baud rate of the second amplitude shift keyed wake up portion;
c) determining a baud rate of the first signal and the second signal based on the baud rate of the first and second amplitude shift keyed wake up portion; and
d) switching operation of the receiver for receiving one of an amplitude shift keyed signal and a frequency shift keyed signal responsive to the determined baud rate of one of the first and second amplitude shift keyed wake up portions received signal.
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Accused Products
Abstract
A receiver is utilized to receive signals from various systems within a vehicle such as tire pressure monitoring system (TPM) and a remote keyless entry system (RKE). During the on time, the receiver sequentially is open to receive a first signal with a first baud rate. If the signal of the first baud rate is not received, the receiver receives a second signal at a second baud rate. Upon receipt of a transmission, the receiver operates according to a mode that corresponds to the transmission indicated by the specific baud rate. The operation of the receiver can include specialized filtering, or other known signal processing that is tailored to the specific transmission data communication requirements.
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Citations
16 Claims
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1. A method of operating a receiver comprising the steps of:
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a) receiving a first amplitude shift keyed wake up portion as part of a first signal that initiates operation of the receiver; b) receiving a second amplitude shift keyed wake up portion as part of a second signal, wherein a baud rate of the first amplitude shift keyed wake up portion is different than a baud rate of the second amplitude shift keyed wake up portion; c) determining a baud rate of the first signal and the second signal based on the baud rate of the first and second amplitude shift keyed wake up portion; and d) switching operation of the receiver for receiving one of an amplitude shift keyed signal and a frequency shift keyed signal responsive to the determined baud rate of one of the first and second amplitude shift keyed wake up portions received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of tailoring operation of a receiver for receiving transmissions from a vehicle system comprising the steps of:
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a) receiving a first transmission having a first wake up portion and a first transmission rate; b) receiving a second transmission having a second wake up portion and a second transmission rate, wherein the first wake up portion and the second wake up portion comprises a common frequency modulation and a remainder of the first transmission includes a modulation different than a remainder of the second transmission; c) identifying the transmission based on a transmission rate of the wake up portion; and d) switching the receiver to a mode of operation corresponding with the transmission responsive to identifying the transmission based on the transmission rate of the wake up portion. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A receiver for receiving signals from both a remote keyless entry system and a tire pressure monitoring system comprising:
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a controller for determining a transmission rate of an incoming amplitude shift keyed wake up signal; and a filter switched between a first mode for receiving frequency shift keyed signals and a second mode for receiving an amplitude shift keyed signal responsive to the determined transmission rate for processing the incoming signal according to the transmission rate corresponding to the determined incoming amplitude shift keyed wake up signal. - View Dependent Claims (15, 16)
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Specification