CPC G01S 7/292 (2013.01) [G01S 7/354 (2013.01)] | 20 Claims |
1. A method for operating a radar system, comprising:
generating a reference signal comprising a sequence of waveforms at a transmitter module;
generating a plurality of frequency and time offset modulation signals from the reference signal for a corresponding plurality of N transmitters of the radar system, wherein each transmitter is associated with a distinct frequency and time offset modulation signal;
transmitting the plurality of frequency and time offset modulation signals as N radio-frequency encoded transmit signals from the N transmitters at the radar system;
receiving, at a receiving antenna of a receiver module at the radar system, a target return signal reflected from the N radio-frequency encoded transmit signals;
mixing the target return signal with the reference signal at the receiver module to produce an intermediate frequency signal;
filtering the intermediate frequency signal with a bank of one or more notch filters to produce a filtered intermediate frequency signal, where the bank of one or more notch filters is clocked with a sampling clock frequency FCLOCK to control harmonic notch frequencies of the bank of one or more notch filters;
converting the filtered intermediate frequency to a digital signal with an analog-to-digital converter at the receiver module that is clocked with a sampling clock frequency of at least FCLOCK; and
processing the digital signal to generate a range spectrum comprising N segments that correspond, respectively, to the N radio frequency encoded transmit signals transmitted over the N transmitters.
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