Title :
Transceiver Optimization for Unicast/Multicast MIMO Cognitive Overlay/Underlay Networks
Author :
Gupta, Nikhil ; Jagannatham, Aditya K.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Kanpur, Kanpur, India
Abstract :
In this work, we develop a majorization theory based linear precoding framework for optimal transceiver design in MIMO cognitive radio networks. Closed form expressions are derived for the optimal MIMO precoders using two new transceiver design paradigms, the zero-forcing transceiver (ZFT) and the interference optimized transceiver (IOT), for overlay and underlay MIMO cognitive radio networks respectively. Further, another novel contribution of this work is to derive the precoders for multicast MIMO cognitive radio scenarios based on novel multi-user mean-squared error (MSE) bounds. Simulation results demonstrate the performance of the proposed optimal MIMO transceivers.
Keywords :
MIMO communication; cognitive radio; linear codes; mean square error methods; multicast communication; optimisation; overlay networks; precoding; radio transceivers; radiofrequency interference; IOT; MSE bound; ZFT; interference optimized transceiver; majorization theory based linear precoding; multicast MIMO cognitive radio overlay-underlay network; multiuser mean squared error bound; transceiver optimization; unicast MIMO cognitive radio overlay-underlay network; zero-forcing transceiver; Cognitive radio; Interference; MIMO; Optimization; Radio transmitters; Receivers; Transceivers; Cognitive radio; MIMO; transceiver optimization;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2015.2413940
