US Patent Issued to NEC on Aug. 5 for "Communication system, receiver, distortion detection device, and method" (Japanese Inventor)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,381,630, issued on Aug. 5, was assigned to NEC Corp. (Tokyo).

"Communication system, receiver, distortion detection device, and method" was invented by Manabu Arikawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A coherent receiving circuit coherently receives a signal transmitted via a transmission line. A filter group includes a first WL filter, a filter layer, and a second WL filter being connected in tandem. A coefficient updating means adaptively controls filter coefficients of the first WL filter and the second WL filter by using an error back propagation method, based on a difference between an output signal being output from the filter g...