FMCW Radar System On A Chip Measuring Phase Noise
AssigneeTexas Instruments Incorporated
InventorBrian Paul Ginsburg
Life of this patent
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Abstract
A cascaded radar system is provided that includes a master radar system-on-a-chip (SOC) with transmission signal generation circuitry and a slave radar SOC coupled to an output of the master radar SOC to receive a signal from the transmission signal generation circuitry of the master SOC. In this system, the slave radar SOC is operable to measure phase noise in the signal received from the transmission signal generation circuitry of the master SOC.
Claims20
A cascaded radar system comprising:
- a master radar system-on-a-chip (SOC) including first transmission signal generation circuitry;
- and
- a slave radar SOC coupled to an output of the master radar SOC to receive a first signal from the first transmission signal generation circuitry, the slave radar SOC operable to measure phase noise in the first signal.
A method for phase noise measurement in a cascaded radar system, the method comprising:
- receiving a signal in a first radar device of the cascaded radar system, the signal generated by first transmission signal generation circuitry of a second radar device;
- and
- measuring phase noise in the signal in the first radar device.
A radar device configured to operate in a normal mode and a phase noise measurement mode, the radar device comprising:
- first transmission signal generation circuitry operable to generate a reference signal when the radar device is in phase noise measurement mode and to generate signals for transmission when the radar device is in normal mode;
- an input buffer coupled to second transmission signal generation circuitry of another radar device to receive a signal for phase noise measurement from the second transmission signal generation circuitry when the radar device is in phase noise measurement mode;
- at least one receive channel including a baseband filter chain;
- and
- phase detection circuitry coupled to an output of the first transmission signal generation circuitry to receive the reference signal, to an output of the input buffer to receive the signal from the input buffer, and to an input of the baseband filter chain, the phase detection circuitry operable when the radar device is in phase noise measurement mode to generate a phase noise test signal of a phase difference between the signal and the reference signal and to send the phase noise test signal to the input of the baseband filter chain.
Dependencies are inferred from the claim text.