ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,416, issued on July 21, was assigned to SUN PATENT TRUST (New York).
"Pre-coding method and transmitter" was invented by Yutaka Murakami (Kanagawa, Japan), Tomohiro Kimura (Osaka, Japan) and Mikihiro Ouchi (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the se...