US Patent Issued to NTT on May 19 for "Adaptive equalizer, step size derivation method and program" (Japanese Inventors)

ALEXANDRIA, Va., May 19 -- United States Patent no. 12,634,016, issued on May 19, was assigned to NTT Inc. (Tokyo).

"Adaptive equalizer, step size derivation method and program" was invented by Kengo Horikoshi (Musashino, Japan), Seiji Okamoto (Musashino, Japan) and Masanori Nakamura (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An adaptive equalizer includes an updating unit that updates a step size of a vector of a tap coefficient used for controlling an adaptive filter based on a time-series update vector in accordance with a time-series input and output of the adaptive filter that tracks a polarization state of an optical signal received by a coherent optical receiver. The updating uni...