Location device and system using UWB and non-UWB signals
First Claim
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1. A location system and a portable location device, the portable location device comprising:
- a first transmitter arranged to transmit ultra-wideband signals to the location system;
a receiver for receiving the non-ultra-wideband control signals from the location system; and
a control unit coupled to the receiver and arranged to control the transmission by the first transmitter of ultra-wideband signals in dependence on the non-ultra-wideband control signals received at the portable location device; and
the location system comprising;
a plurality of receivers for receiving the ultra-wideband signals from the portable device;
a second transmitter arranged to transmit the non-ultra-wideband control signals to the portable device; and
a location unit configured to determine the location of the portable location device by controlling the second transmitter to transmit the non-ultra-wideband control signals to the portable device and by using information derived from the ultra-wideband signals received from the first transmitter of the portable location device at more than one of the receivers of the location system.
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Abstract
A portable location device for use in a location system, the device comprising a transmitter for transmitting ultra-wideband signals, a receiver for receiving non-ultra-wideband signals and a control unit coupled to the receiver for controlling the operation of the device in dependence on the received non-ultra-wideband signals.
38 Citations
20 Claims
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1. A location system and a portable location device, the portable location device comprising:
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a first transmitter arranged to transmit ultra-wideband signals to the location system; a receiver for receiving the non-ultra-wideband control signals from the location system; and a control unit coupled to the receiver and arranged to control the transmission by the first transmitter of ultra-wideband signals in dependence on the non-ultra-wideband control signals received at the portable location device; and the location system comprising; a plurality of receivers for receiving the ultra-wideband signals from the portable device; a second transmitter arranged to transmit the non-ultra-wideband control signals to the portable device; and a location unit configured to determine the location of the portable location device by controlling the second transmitter to transmit the non-ultra-wideband control signals to the portable device and by using information derived from the ultra-wideband signals received from the first transmitter of the portable location device at more than one of the receivers of the location system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification