Title :
BD precoding schemes for cognitive MIMO system
Author :
Zhang, Caihong ; Guo, Li
Author_Institution :
Lab. of Digital Signal Process., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
This paper focuses on pre-coding schemes for the downlink of multiple user multi-input multi-output (MU-MIMO) system in cognitive radio (CR) network. The spectrum band can be utilized by allowing a number of cognitive users to coexist with primary users (PUs) through a pre-coding scheme. The capacity problems maximize the sum rate of CUs subject to the interference constraint for PUs and total transmitted power constraint can be solved with high complexity. To simplify the problem, this paper presents two suboptimal pre-coding schemes that pre-cancel the co-channel interference to PUs as well as mitigate interference between cognitive users (CUs). Simulation results show that the two suboptimal algorithms are able to achieve high sum rate throughput with low complexity.
Keywords :
MIMO communication; cochannel interference; cognitive radio; BD precoding schemes; co-channel interference; cognitive MIMO system; cognitive radio network; multiple user multi-input multi-output system; pre-coding schemes; Chromium; Cognitive radio; Digital signal processing; Downlink; Interchannel interference; Interference constraints; Laboratories; MIMO; Radio spectrum management; Throughput; BD; MU-MIMO; cognitive radio; pre-coding;
Conference_Titel :
Network Infrastructure and Digital Content, 2009. IC-NIDC 2009. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4898-2
Electronic_ISBN :
978-1-4244-4900-6
DOI :
10.1109/ICNIDC.2009.5360966
