MULTIPLE-BAND IDENTIFICATION AND RANGING

摘要

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.

主权项

1. A 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 transmit LF localization signals in response to receiving the acknowledgement reply, wherein the localization signals are for determining a location of the paired electronic key.