Bidirectional phase-based distance estimation with crystal offset
AssigneeShenzhen Goodix Technology Co., Ltd.
InventorsMohammad Ranjbar, Amir Dezfooliyan, Waleed Younis
Life of this patent
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Abstract
A transceiver circuit is disclosed. The transceiver circuit includes an antenna, a receiver RF chain configured to receive a receiver RF signal from the antenna, a transmitter RF chain configured to transmit a transmitter RF signal to the antenna, and a controller configured to cause the receiver RF chain to receive a first distance estimate between the antenna and another transceiver circuit, to calculate a second distance estimate between the antenna and the other transceiver circuit, and to determine a range estimate between the antenna and the other transceiver circuit based on the first distance estimate and the second distance estimate.
Claims13
A transceiver circuit, comprising:
- an antenna;
- a receiver RF chain configured to receive a receiver RF signal from the antenna;
- a transmitter RF chain configured to transmit a transmitter RF signal to the antenna;
- and
- a controller configured to:
- cause the receiver RF chain to receive, from another transceiver circuit, a first distance estimate between the antenna and the other transceiver circuit,
- calculate a second distance estimate between the antenna and the other transceiver circuit,
- determine a range estimate between the antenna and the other transceiver circuit based on the first distance estimate and the second distance estimate,
- cause the transmitter RF chain to transmit a first initiation signal to the other transceiver circuit, wherein the first initiation signal is part of a first signal exchange,
- cause the receiver RF chain to receive a first reflection signal from the other transceiver circuit, wherein the first reflection signal is part of the first signal exchange,
- cause the receiver RF chain to receive a second initiation signal from the other transceiver circuit, wherein the second initiation signal is part of a second signal exchange, and
- cause the transmitter RF chain to transmit a second reflection signal to the other transceiver circuit, wherein the second reflection signal is part of the second signal exchange.
A system, comprising:
- first and second transceiver circuits,
- wherein the first transceiver circuit comprises:
- an antenna,
- a receiver RF chain configured to receive a receiver RF signal from the antenna,
- a transmitter RF chain configured to transmit a transmitter RF signal to the antenna, and
- a controller configured to:
- cause the receiver RF chain to receive, from the second transceiver circuit, a first distance estimate between the antenna and the second transceiver circuit,
- calculate a second distance estimate between the antenna and the second transceiver circuit,
- determine a range estimate between the antenna and the second transceiver circuit based on the first distance estimate and the second distance estimate,
- cause the transmitter RF chain to transmit a first initiation signal to the second transceiver circuit, wherein the first initiation signal is part of a first signal exchange,
- cause the receiver RF chain to receive a first reflection signal from the second transceiver circuit, wherein the first reflection signal is part of the first signal exchange,
- cause the receiver RF chain to receive a second initiation signal from the second transceiver circuit, wherein the second initiation signal is part of a second signal exchange, and
- cause the transmitter RF chain to transmit a second reflection signal to the second transceiver circuit, wherein the second reflection signal is part of the second signal exchange,
- wherein the second transceiver circuit comprises:
- a second antenna,
- a second receiver RF chain configured to receive a second receiver RF signal from the second antenna,
- a second transmitter RF chain configured to transmit a second transmitter RF signal to the second antenna, and
- a second controller configured to calculate the first distance estimate between the antenna and the first transceiver circuit, and to cause the second transmitter RF chain to transmit the first distance estimate between the antenna and the first transceiver circuit to the first transceiver circuit.
Dependencies are inferred from the claim text.