ALEXANDRIA, Va., June 16 -- United States Patent no. 12,309,092, issued on May 20, was assigned to NTT DOCOMO Inc. (Tokyo).
"Terminal" was invented by Hiroki Harada (Tokyo), Satoshi Nagata (Tokyo), Yuki Matsumura (Tokyo), Shohei Yoshioka (Tokyo), Hideyuki Moroga (Tokyo) and Lihui Wang (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "When using a different frequency band such as FR4, which is different from a frequency band including FR1 and FR2, the terminal uses a phase tracking reference signal (PTRS) having a different density in at least one of a time direction and a frequency direction to perform transmission or reception of a signal using the PTRS."
The patent was filed on June 26, 2019, under ...