Title :
Hierarchical prior zero-forcing for cognitive relaying
Author :
Salib, Feeby ; Seddik, Karim G.
Author_Institution :
Electron. Eng. Dept., American Univ. in Cairo, Cairo, Egypt
Abstract :
In this paper, cognitive radio relaying in the physical layer is investigated where the cognitive base station (CBS) relays the PU´s signal while transmitting its own signals to its secondary users (SUs). A new and simple linear method for beamforming, based on zero-forcing beamforming, adapted for the different levels of priority that users may possess in a cognitive radio network, is proposed and the special case of two SUs is analytically studied.
Keywords :
array signal processing; cognitive radio; relay networks (telecommunication); CBS relays; PU signal; beamforming; cognitive base station; cognitive radio network; cognitive radio relaying; hierarchical prior zero-forcing beamforming; linear method; physical layer; secondary users; Array signal processing; Cognitive radio; Dynamic spectrum access; Interference; Signal to noise ratio; Vectors;
Conference_Titel :
Dynamic Spectrum Access Networks (DYSPAN), 2014 IEEE International Symposium on
Conference_Location :
McLean, VA
DOI :
10.1109/DySPAN.2014.6817786
