Vehicle receiver system in which a single receiver circuit is controlled to receive signals transmitted from a plurality of remote devices having respectively different transmission frequencies
First Claim
1. A receiver system for installation in a motor vehicle, having a receiver apparatus comprising:
- a receiving antenna for receiving, as an antenna input signal, a plurality of modulated transmitted signals having respective ones of a predetermined plurality of carrier frequencies, and a receiver circuit controlled by a control signal for selecting one of said carrier frequencies as a currently determined one of a plurality of receiving frequencies, and comprising means for operating on said antenna input signal to obtain demodulated data from a received signal corresponding to said currently determined receiving frequency;
wherein said receiver system comprises transmission timing prediction means for supplying said control signal to said receiver circuit, and said transmission timing prediction means determines a value for said currently determined receiving frequency based on predetermined criteria relating to equipment of said vehicle.
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Accused Products
Abstract
A vehicle-mounted receiver system includes a receiver apparatus that is controlled for receiving, in common, transmissions from a plurality of external devices such as a remote key, smart key, etc., having respectively different transmission frequencies. The receiving frequency at the current time is selected based on criteria such as the insertion/non-insertion status of the ignition key, or whether an interrogation signal has been transmitted to a specific external device so that a response transmission is be received from that device during a specific time interval and the receiving frequency is to be set accordingly during that specific interval.
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Citations
14 Claims
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1. A receiver system for installation in a motor vehicle, having a receiver apparatus comprising:
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a receiving antenna for receiving, as an antenna input signal, a plurality of modulated transmitted signals having respective ones of a predetermined plurality of carrier frequencies, and a receiver circuit controlled by a control signal for selecting one of said carrier frequencies as a currently determined one of a plurality of receiving frequencies, and comprising means for operating on said antenna input signal to obtain demodulated data from a received signal corresponding to said currently determined receiving frequency;
wherein said receiver system comprises transmission timing prediction means for supplying said control signal to said receiver circuit, and said transmission timing prediction means determines a value for said currently determined receiving frequency based on predetermined criteria relating to equipment of said vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification