ALEXANDRIA, Va., March 17 -- United States Patent no. 12,580,704, issued on March 17, was assigned to Huawei Technologies'Co.'Ltd.' (Shenzhen, China).

"High capacity DMRS sequences for a communication system" was invented by Yi Qin (Shanghai), Peng Wang (Kista, Sweden) and Branislav M. Popovic (Kista, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A first communication device determines a DMRS sequence based on a cover code in a set of cover codes; and thereafter determines a DMRS by mapping the DMRS sequence onto one or more PRBs. The cover code is dependent on a DMRS antenna port index, and cover codes in the set of cover codes are orthogonal to each other in each PRB, and wherein a maximum correlat...