Patent ID: 11867844
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 5:
6. A Lidar system, comprising:
a photodetector configured to generate an electrical signal in response to a reflected light beam received at the photodetector, the reflected light beam being a reflection of a chirp signal from an object, a bandwidth of the electrical signal being the same as a bandwidth of the chirp signal;
a spectrum analyzer including:
a power divider configured to partition the electrical signal by frequency into a plurality of channels;
a first comb filter and a second comb filter, wherein the first comb filter includes a first plurality of outlets spaced by frequency and the second comb filter includes a second plurality of outlets spaced by frequency, wherein the frequencies of the first plurality of outlets and the frequencies of the second plurality of outlets are interleaved and span the bandwidth of the electrical signal, wherein the power divider partitions the channels sequentially by frequency with a first channel directed to a first outlet of the first comb filter, a second channel directed to a first outlet of the second comb filter and returning to the first comb filter to repeat the frequency partitioning of the electrical signal;
an analog-to-digital converter associated with a selected channel one of the first comb filter and the second comb filter configured to convert the electrical signal within the selected channel from an analog signal to a digital signal;
a comb filter for configured to provide output from the selected channel of the power divider to the analog-to-digital converter; and

a processor configured to determine a parameter of the object from the digital signal in the selected channel.