Title :
Optimal relay precoding for spectrum sharing multi-hop MIMO cognitive radio networks
Author :
Quanzhong Li ; Renhai Feng ; Jiayin Qin
Author_Institution :
Sch. of Inf. Sci. & Technol., Sun Yat-Sen Univ., Guangzhou, China
Abstract :
Optimal relay precoding design is studied for spectrum sharing non-regenerative multi-hop MIMO cognitive relay systems. By exploiting multiple antennas at all the nodes, the optimal structures of all the relay precoding matrices are derived, aiming to maximise the system capacity subject to the transmit power constraints at the relays and the interference power constraints at the primary user. The effectiveness of the proposed precoding is validated by simulation results.
Keywords :
MIMO communication; antenna arrays; cognitive radio; matrix algebra; network coding; precoding; radio networks; radiofrequency interference; relay networks (telecommunication); interference power constraints; multiple antennas; optimal relay precoding design; relay precoding matrices; spectrum sharing multihop MIMO cognitive radio networks; spectrum sharing nonregenerative multihop MIMO cognitive relay systems;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.3598
