ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,771,474, issued on Oct. 20, was assigned to NTT Inc. (Tokyo).

"Wireless communication method, wireless communication system, and wireless transmission device" was invented by Keita Kuriyama (Musashino, Japan), Hayato Fukuzono (Musashino, Japan), Toshifumi Miyagi (Musashino, Japan) and Takeshi Onizawa (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The wireless transmission device includes a power amplifier that varies transmission power. An SNR degradation amount calculation unit calculates an SNR degradation amount {QAM} caused by QAM and an SNR degradation amount {APSK} caused by APSK on the basis of input/output characteristics of th...