Multiple-band identification and ranging
AssigneeTexas Instruments Deutschland GmbH
InventorsJürgen Stefan Austen, Jens Graul, Andreas Hagl
Life of this patent
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Abstract
A long-range power-efficient multiple-band identification system and method includes, for example, a base-station control module and paired electronic key fob. The base-station control module and paired electronic key fob is arranged to provide a UHF (ultra-high frequency) wake transmitter for transmitting a wakeup signal in a UHF frequency range to the paired electronic key. When in range, the electronic key is awakened by the wakeup signal and in response transmits an acknowledgment reply to the base-station control module. After receiving the acknowledgment, the base-station control module transmits a relatively high power localization signal for determining an electronic key location.
Claims20
An electronic key, comprising:
- a UHF (ultra-high frequency) receiver arranged for receiving wakeup signals having a frequency in a UHF frequency range via a UHF antenna;
- a transmitter for generating an acknowledgement reply in response to the wakeup signals;
- and
- a three dimensional wake receiver that is arranged to receive LF (low frequency) wakeup signals comprising adjacent LF wakeup signals, after transmitting the acknowledgement reply;
- wherein the UHF receiver is arranged to receive the wakeup signals in between the reception of each adjacent LF wakeup signal, wherein the LF wakeup signals are received in response to a determination that a measured amount of UHF noise exceeds a threshold.
A base station control system, comprising:
- a UHF (ultra-high frequency) transmitter arranged for transmitting a UHF wakeup signal having a frequency in a UHF frequency range;
- a receiver for receiving an acknowledgement reply in response to the UHF wakeup signal;
- and
- an LF (low frequency) transmitter that is arranged to a plurality of LF wakeup signals comprising adjacent wakeup signals, wherein the UHF transmitter transmits one or more UHF wakeup signals in between the transmission of each adjacent LF wakeup signal of the plurality of LF wakeup signals, wherein the base station control system monitors an amount of UHF noise and transmits the plurality of LF wakeup signals when the amount exceeds a threshold.
A base station control system, comprising:
- a UHF (ultra-high frequency) transmitter arranged for transmitting to a paired electronic key a UHF wakeup signal having a frequency in a UHF frequency range;
- a receiver for receiving an acknowledgement reply transmitted from the paired electronic key in response to the UHF wakeup signal;
- and
- an LF (low frequency) transmitter that is arranged to a plurality of LF wakeup signals comprising adjacent wakeup signals to the paired electronic key, wherein the UHF transmitter transmits one or more UHF wakeup signals in between the transmission of each adjacent LF wakeup signal of the plurality of LF wakeup signals, and wherein the plurality of LF wakeup signals as transmitted periodically.
Dependencies are inferred from the claim text.