Patent ID: 11949458
Assignee: SEQUENT LOGIC, LLC
Field: Measurement (Instruments)
Classification: CPC G  H | IPC H

Claim 10:
11. A method of performing Optical Code Delay Reflectometry (OCoDR), the method comprising:
modulating a sequence on incident electromagnetic (EM) radiation to obtain modulated EM radiation, the sequence having at least substantially zero circular autocorrelation for non-zero shifts of the sequence;
injecting the modulated EM radiation into a system under test;
interfering reflected EM radiation received from the system under test responsive to the modulated EM radiation with reference EM radiation to obtain interfered EM radiation, the reference EM radiation including substantially fixed frequency continuous-wave EM radiation;
converting the interfered EM radiation into an electrical signal;
digitizing the electrical signal to obtain a digitized continuous interferogram; and
applying one of the sequence or a complex conjugate of the sequence to the digitized continuous interferogram to obtain phasors corresponding to different delays.