Systems and Methods Providing Time of Flight Detection with Time-To-Digital Converter Reconstruction of Signal
OwnerMatthieu Chevrierinventor
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Abstract
A system includes a radio frequency (RF) receive path, which is configured to receive a reflection of a transmitted signal. The signal may include a pulse train having rising edges and falling edges. The RF receive path may process the received signal using one or more time-to-digital converters (TDCs). The output of the TDCs may be used to reconstruct an image of the transmitted signal. The system may further include a time domain (TD) cross-correlation function circuit that is configured to perform a TD cross-correlation function on the transmitted signal and on the reconstructed image. The result of the TD cross-correlation function may indicate a time of flight.
Claims20
A method comprising:
- transmitting a first signal;
- receiving a second signal, wherein the second signal comprises a reflection of the first signal;
- processing the second signal, including identifying a first time associated with a rising edge of the first signal and a second time associated with a falling edge of the first signal;
- generating a reconstructed signal from the first time and the second time;
- performing a time domain (TD) cross-correlation function on the first signal and the reconstructed signal;
- and
- identifying a time-of-flight between the first signal and the second signal based on the TD cross-correlation function.
A system comprising:
- a transmit path including:
- a pulse train generator circuit configured to generate a first series of pulses;
- and
- a first radio frequency (RF) circuit coupled to the pulse train generator circuit and configured to transmit a first signal based on the first series of pulses;
- a receive path including:
- a second RF circuit configured to receive a second signal that is in response to the first signal and that includes a second series of pulses;
- a time-to-digital converter (TDC) circuit configured to generate time data, including first time data indicating rising edges of the second series of pulses and second time data indicating falling edges of the second series of pulses;
- a pulse train reconstruction circuit configured to generate a third series of pulses based on the first time data and the second time data;
- and
- a time domain (TD) cross-correlation function circuit configured to perform a TD cross-correlation function on the first series of pulses and the third series of pulses;
- and
- a processor core configured to receive an output from the TD cross-correlation function and to determine a time-of-flight based on an output of the TD cross-correlation function circuit.
A system comprising:
- a time-to-digital converter (TDC) circuit configured to generate time data, including first time data indicating rising edges of a received series of pulses and second time data indicating falling edges of the received series of pulses;
- a pulse train reconstruction circuit configured to generate an image of the received series of pulses based on the first time data and the second time data;
- and
- a time domain (TD) cross-correlation function circuit configured to perform a TD cross-correlation function on a transmitted series of pulses and the image of the received series of pulses.
Dependencies are inferred from the claim text.