METHOD TO INCREASE ACCURACY OF LOCATING UNIT IN WIRELESS VEHICLE SYSTEM
First Claim
1. A wireless unit for a wireless vehicle system comprising:
- a receiver for receiving a vehicle-originating signal, the receiver having a sensitivity;
a transmitter for transmitting a reply signal;
a received signal strength indicator (RSSI) for determining a received signal strength of the vehicle-originating signal;
a memory storing sensitivity data corresponding to the sensitivity;
a control unit in electrical communication with the receiver, the transmitter, the RSSI and the memory, wherein the control unit is configured to communicate with the transmitter to direct the transmitter to transmit the reply signal, wherein the reply signal includes received signal strength data used for determining a distance between the wireless unit and an associated vehicle-side transmitter on an associated vehicle, wherein the received signal strength data is based on the received signal strength and the sensitivity data.
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Accused Products
Abstract
A wireless unit for a wireless vehicle system includes a receiver for receiving a vehicle-originating signal, a transmitter for transmitting a reply signal, a received signal strength indicator (RSSI) for determining a received signal strength of the vehicle-originating signal, a memory for storing sensitivity data, and a control unit in electrical communication with the receiver, the transmitter, the RSSI and the memory. The receiver has a sensitivity, and the memory is for storing sensitivity data corresponding to the sensitivity of the receiver. The control unit is configured to communicate with the transmitter to direct the transmitter to transmit the reply signal. The reply signal includes received signal strength data used for determining a distance between the wireless unit and an associated vehicle-side transmitter on an associated vehicle. The received signal strength data is based on the received signal strength and the sensitivity data.
33 Citations
19 Claims
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1. A wireless unit for a wireless vehicle system comprising:
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a receiver for receiving a vehicle-originating signal, the receiver having a sensitivity; a transmitter for transmitting a reply signal; a received signal strength indicator (RSSI) for determining a received signal strength of the vehicle-originating signal; a memory storing sensitivity data corresponding to the sensitivity; a control unit in electrical communication with the receiver, the transmitter, the RSSI and the memory, wherein the control unit is configured to communicate with the transmitter to direct the transmitter to transmit the reply signal, wherein the reply signal includes received signal strength data used for determining a distance between the wireless unit and an associated vehicle-side transmitter on an associated vehicle, wherein the received signal strength data is based on the received signal strength and the sensitivity data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for manufacturing a wireless unit for a wireless vehicle system comprising:
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transmitting a signal from a transmitter to a wireless unit; determining an expected received signal strength to be measured by the wireless unit based on the signal from the transmitter; receiving the signal via an antenna on the wireless unit; measuring the received signal strength of the received signal; comparing the expected received signal strength to the measured received signal strength; and determining a sensitivity of the wireless unit based on comparing the expected received signal strength to the measured received signal strength. - View Dependent Claims (11, 12, 13, 14, 15)
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16. The method of claim 16, further comprising determining a correction factor based on the sensitivity and storing the correction factor, wherein the correction factor is a value that compensates for a respective sensitivity of the wireless unit as compared to a benchmark sensitivity.
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17. A method for operating a wireless vehicle system comprising:
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transmitting a vehicle-originating signal from a vehicle-side transmitter; receiving the vehicle-originating signal via a receiver on a wireless unit; measuring a received signal strength of the vehicle-originating signal; retrieving sensitivity data from a memory on the wireless unit; transmitting a reply signal from the fob, wherein the reply signal includes received signal strength data for determining a distance between the wireless unit and the vehicle-side transmitter and the received signal strength data is based on the received signal strength and the sensitivity data. - View Dependent Claims (18, 19)
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Specification