ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,218,707, issued on Feb. 4, was assigned to Google LLC (Mountain View, Calif.).
"Coherent receiver with mixed signal processing" was invented by Xiang Zhou (Sunnyvale, Calif.) and Hong Liu (Palo Alto, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A receiver system is provided for receiving a coherent Pulse Amplitude Modulation (PAM) encoded signal. The receiver system may include an optical polarization component configured to modulate a polarization of the received coherent PAM encoded signal. The receiver system may further include a digital signal processor (DSP) configured to perform polarization recovery between the received coherent PAM enco...