US Patent Issued to NTT on July 7 for "Optical transmission system, signal quality measurement apparatus and signal quality measurement method" (Japanese Inventors)

ALEXANDRIA, Va., July 7 -- United States Patent no. 12,676,671, issued on July 7, was assigned to NTT Inc. (Tokyo).

"Optical transmission system, signal quality measurement apparatus and signal quality measurement method" was invented by Masanori Nakamura (Musashino, Japan), Hiroshi Yamazaki (Musashino, Japan), Takayuki Kobayashi (Musashino, Japan), Fukutaro Hamaoka (Musashino, Japan) and Yutaka Miyamoto (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A transmission apparatus repeatedly inserts reference signal sequences into a transmission signal sequence at different timings, and converts the transmission signal sequence, into which the reference signal sequences are inserted, into an opti...