Title :
Nonlinear precoding scheme for the downlink of multiuser MIMO cognitive radio networks
Author :
Hui Lu ; Li Guo ; Jiaru Lin ; Yonghua Li
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
This paper aims to solve the problem that the cognitive base station (CBS) minimizes the BER and maximizes the sum capacity in the condition of the interference constraint for the primary users (PUs). The main contribution of this paper is applying three kinds of THP algorithm in the multiple user multi-input multi-output (MU-MIMO) system to cognitive radio (CR) network by using matrix decomposition. The Computer simulations of these modified algorithm shows that cognitive minimum mean square error block diagonal Tomlinson-Harashima precoding (CR-MMSE-BD-THP) has better performance.
Keywords :
MIMO communication; block codes; cognitive radio; least mean squares methods; matrix decomposition; multi-access systems; nonlinear codes; precoding; BER; CBS; THP algorithm; Tomlinson-Harashima precoding; block diagonal precoding; cognitive base station; cognitive minimum mean square error; interference constraint; matrix decomposition; multiple user multiple input multiple output system; multiuser MIMO cognitive radio networks; nonlinear precoding; primary user; sum capacity; MIMO; CR-MMSE-BD-THP; CR-Tx-Rx-BD-THP; CR-ZFBD-THP; MU-MIMO; cognitive radio (CR) network; precoding;
Conference_Titel :
Wireless Personal Multimedia Communications (WPMC), 2013 16th International Symposium on
