US 12,447,978 B2
Tunable filters for signal integrity in real time diagnostics
Daniel DSouza, Monte Sereno, CA (US); Fen Chen, Morgan Hill, CA (US); and Xuefeng Wang, Cupertino, CA (US)
Assigned to GM CRUISE HOLDINGS LLC, San Francisco, CA (US)
Filed by GM Cruise Holdings LLC, San Francisco, CA (US)
Filed on Mar. 20, 2023, as Appl. No. 18/186,902.
Prior Publication US 2024/0317244 A1, Sep. 26, 2024
Int. Cl. B60W 50/02 (2012.01); B60W 50/04 (2006.01); G07C 5/08 (2006.01); B60W 50/00 (2006.01)
CPC B60W 50/0205 (2013.01) [B60W 50/04 (2013.01); G07C 5/0808 (2013.01); B60W 2050/0052 (2013.01); B60W 2050/041 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for real time, adaptive filtering of signal transmissions in a vehicle, comprising:
transmitting a high-speed transmit signal, the high-speed transmit signal including frequencies on the order of 10 gigahertz and higher, from a first vehicle component;
detecting harmonics in the high-speed transmit signal;
adjusting an active tunable filter electrically disposed between the first vehicle component and a second vehicle component, wherein the adjusting includes modulating a pulse wave signal to modify a duty cycle of a pulse generator to change a filter conductance of the active tunable filter;
filtering the high-speed transmit signal at the active tunable filter to filter out selected detected harmonics, wherein the selected detected harmonics are in a selected frequency range to match the active tunable filter to the first vehicle component and the second vehicle component;
receiving the filtered high-speed transmit signal at the second vehicle component; and
monitoring in real time the filtered high-speed transmit signal at the second vehicle component and when the high-speed transmit signal changes, either repeating the adjusting of the active tunable filter or adjusting an operating behavior of the first vehicle component.