High-accuracy detection in collaborative tracking systems
AssigneeLattice Semiconductor Corporation
InventorsFarshid Aryanfar, Jihong Ren
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Abstract
An electronic device for wirelessly tracking the position of a second electronic device is disclosed. The electronic device includes transceiver circuitry and processing circuitry. The transceiver circuitry includes a beacon generator to generate a beacon at a particular frequency and direction. An antenna array transmits the beacon, and receives at least one modulated reflected beacon from the second electronic device. The transceiver circuitry also includes a discriminator to discriminate between received modulated reflected beacons and received reflected interfering beacons. The processing circuitry couples to the transceiver circuitry and tracks the position of the second device based on the modulated reflected beacons.
Claims15
A method of calibrating modulation parameters in a beacon signal transmitted by a first electronic device configured for tracking a second electronic device, the method comprising:
- generating, by the first electronic device, a calibration directional beacon;
- transmitting the calibration directional beacon from the first electronic device;
- receiving background reflections of the calibration directional beacon;
- processing the received background reflections of the calibration directional beacon to determine one or more distances of background echo sources from the first electronic device;
- and
- causing a target device to set a modulation value based on determined locations, the modulation value set to enable the first electronic device to distinguish a modulated beacon received from the target device from background reflections of a subsequent directional beacon, the modulated beacon modulated based on the modulation value.
An electronic reader device for tracking an electronic target device, the electronic reader device comprising:
- a beacon generator to generate a calibration directional beacon;
- an antenna array to transmit the calibration directional beacon and to receive background reflections of the calibration directional beacon;
- processing circuitry to process the received background reflections of the calibration directional beacon to determine one or more distances of background echo sources from the electronic reader device and to cause the electronic target device to set a modulation value based on determined locations, the modulation value set to enable the first electronic device to distinguish a modulated beacon received from the target device from background reflections of a subsequent directional beacon, the modulated beacon modulated based on the modulation value.
A tracking system comprising:
- a reader device comprising:
- a beacon generator to generate a calibration directional beacon;
- an antenna array to transmit the calibration directional beacon and to receive background reflections of the calibration directional beacon;
- and
- processing circuitry to process the received background reflections of the calibration directional beacon to determine one or more distances of background echo sources from the first electronic device and to generate a modulation value based on determined locations;
- and
- a target device comprising:
- a transceiver circuit to receive the modulation value from the reader device, to receive a subsequent directional beacon from the reader device, to modulate the subsequent directional beacon according to the modulation value to generate a modulated beacon and to transmit the modulated beacon to the reader device.
Dependencies are inferred from the claim text.