The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2025
Filed:
Feb. 07, 2022
Ntt, Inc., Tokyo, JP;
Keita Kuriyama, Musashino, JP;
Hayato Fukuzono, Musashino, JP;
Toshifumi Miyagi, Musashino, JP;
Takeshi Onizawa, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
A wireless transmission device and a wireless reception device that support QAM and APSK are used. The wireless transmission device includes a power amplifier that varies transmission power. A constellation calculation unit calculates an estimated constellation {QAM} predicted to occur when a QAM-modulated signal is amplified by the power amplifier at desired transmission power on the basis of input/output characteristics of the power amplifier, and similarly calculates an estimated constellation {APSK} predicted to occur when an APSK-modulated signal is amplified at the desired transmission power. A modulation scheme selection unit compares an estimated minimum Euclidean distance on the estimated constellation {QAM} with an estimated minimum Euclidean distance on the estimated constellation {APSK}, and selects the modulation scheme having the longer distance.