Patent ID: 11857267
Assignee: MEDTRONIC NAVIGATION, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. A method of operating a navigation system configured to navigate an instrument during a procedure, the method comprising:
generating a first signal with a controller;
sending the first signal to a transmitter system;
receiving at the controller a transmitter signal from the transmitter system based on the first signal sent to the transmitter system;
generating a second signal with the controller;
sending the second signal to a first portion of a receiver system;
wherein at least one of the generated first signal or the generated second signal is a spread spectrum signal including a binary pseudo noise signal;
receiving at the controller a receiver signal from the receiver system based on the second signal sent to the first portion of the receiver system;
recalling a receiver characterization of a second portion of the receiver system; and
evaluating the transmitter signal, the receiver signal, and the recalled receiver characterization to characterize the navigation system;
wherein evaluating the transmitter signal, the receiver signal, and the recalled receiver characterization includes calibrating and equalizing the transmitter signal and the receiver signal to the respective first signal and the second signal to account for hardware noise in the transmitter system and the receiver system to generate an equalized signal;
wherein the equalized signal is used to determine a pose of a tracking device by removing distortions of the controller and the receiver and having a tracking device signal and noise from external distortion.