Patent ID: 11921195
Assignee: ARBE ROBOTICS LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. An automotive radar sensor, comprising:
a plurality of transmitter circuits coupled to respective transmitting antennas, including at least a first transmitter circuit operative to transmit a first radar signal and a second transmitter circuit operative to transmit a second radar signal later in time after said first radar signal is transmitted, each transmitter circuit operative to generate and couple transmitting signals to said transmitting antennas;
a plurality of receiver circuits coupled to respective receiving antennas, including at least a first receiver circuit and a second receiver circuit, each receiver circuit operative to receive a reflected radar return signal including said first radar signal and said second radar signal;
a digital radar processor (DRP) operative to control said plurality of transmitter circuits and said plurality of receiver circuits and to generate a radar image from received radar return signals, said DRP including an RF built in self-test (RFBIST) circuit operative to analyze the reflected radar return signals for transmitter circuit and/or receiver circuit faults;
said RFBIST circuit operative to:
detect a transmitter fault by utilizing said second transmitter circuit to verify the validity of said first transmitter circuit whereby said second radar signal is transmitted from said second transmitter circuit;
declare a faulty first transmitter circuit if both said first receiver circuit and said second receiver circuit do not detect a valid received first radar signal, and if both of said first receiver circuit and said second receiver circuit detect a valid received second radar signal;

said RFBIST circuit operative to:
detect a receiver fault by utilizing said second transmitter circuit to verify the validity of said first receiver circuit whereby said second radar signal is transmitted from said second transmitter circuit; and
declare a faulty first receiver circuit if a correlation of said first radar signals received at said first receiver circuit and said second receiver circuit does not exceed a first threshold, and if a correlation of said first radar signal and said second radar signal received at said first receiver circuit does not exceed a second threshold.