US Patent Issued to NEC on Sept. 8 for "Digital signal processing circuit, method, receiver, and communication system" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,732,282, issued on Sept. 8, was assigned to NEC Corp. (Tokyo).

"Digital signal processing circuit, method, receiver, and communication system" was invented by Masaki Sato (Tokyo) and Manabu Arikawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A detector is configured to coherently receive a polarization-multiplexed optical signal transmitted from a transmitter via a transmission line. A digital signal processing circuit is configured to perform equalization signal processing on the reception signal coherently received. A carrier phase compensation filter is configured to compensate for a carrier phase in the reception signal. A 4x2 WL filter is...