ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,237, issued on Feb. 17.
"Secure NOMA method based on physical layer security" was invented by Abdelrahman Abushattal (Istanbul) and Huseyin Arslan (Istanbul).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a secure scheme that incorporates both internal and external eavesdroppers to secure all users' links in the downlink PD-NOMA. In particular, the proposed scheme implies that the BS induces a phase shift in each user's symbol based on its corresponding instantaneous channel phase. The phase shift of each user is restricted such that the original symbol is moved to the location of another symbol in the constellation diagram. Therefore, a...