ALEXANDRIA, Va., July 3 -- United States Patent no. 12,348,190, issued on July 1.
"Digital Doherty transmitter" was invented by Fadhel Ghannouchi (Calgary, Canada) and Ramzi Darraji (Calgary, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A digital Doherty amplifier compromises a baseband signal processing block including a digital predistortion unit, a digital signal distribution unit and a digital phase alignment unit; a signal up-conversion block, an RF power amplification block, the RF power amplification block including the carrier amplifier and one or two peaking amplifiers; and a RF Doherty combining network. In another aspect, a digital Doherty amplifier compromises a baseband signal block inc...