Interference-free overlay cognitive radio network based on cooperative space time coding
Vivek Ashok Bohara, See Ho Ting, Yang Han, Ashish Pandharipande · 2010
In this paper, we propose a two-phase overlay spectrum sharing protocol based on cooperative decode-and-forward relaying which allows the secondary system to gain spectrum access along with the primary system. In the proposed scheme, the secondary system operates simultaneously in the same frequency