Synchronization in FMCW radar systems
AssigneeTexas Instruments Incorporated
InventorsKarthik Ramasubramanian, Karthik Subburaj, Sachin Bhardwaj
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Abstract
The disclosure provides a radar apparatus for estimating a position and a velocity of the plurality of obstacles. The radar apparatus includes a local oscillator that generates a first signal. A first transmit unit receives the first signal from the local oscillator and generates a first transmit signal. A frequency shifter receives the first signal from the local oscillator and generates a second signal. A second transmit unit receives the second signal and generates a second transmit signal. The frequency shifter provides a frequency offset to the first signal based on a routing delay mismatch to generate the second signal such that the first transmit signal is phase coherent with the second transmit signal.
Claims16
A radar apparatus comprising
- a local oscillator configured to generate a first signal;
- a first transmit unit configured to receive the first signal from the local oscillator and configured to generate a first transmit signal,
- a frequency shifter configured to receive the first signal from the local oscillator and configured to generate a second signal;
- and
- a second transmit unit configured to receive the second signal and configured to generate a second transmit signal, wherein the frequency shifter is configured to provide a frequency offset to the first signal based on a routing delay mismatch to generate the second signal such that the first transmit signal is phase coherent with the second transmit signal.
A method comprising:
- generating a first signal;
- generating a first transmit signal from the first signal;
- providing a frequency offset to the first signal based on a routing delay mismatch to generate a second signal;
- and
- generating a second transmit signal from the second signal, wherein the first transmit signal is phase coherent with the second transmit signal.
Dependencies are inferred from the claim text.