Downlink dual modes multiple user MIMO Cognitive radio system

Author

Pan, Qun ; Zhang, Xin ; Chang, Yongyu ; Yang, Dacheng

Author_Institution

Wireless Theor. & Technol. Lab., Beijing Univ. of Posts & Telecommun., Beijing, China

fYear

2010

fDate

24-26 Sept. 2010

Firstpage

21

Lastpage

25

Abstract

This paper focuses on maximizing Cognitive radio (CR) system capacity by flexible Multiple input multiple output (MIMO) system, while maintaining the interference to primary user (PU) within a limit. It is proposed that MIMO implemented in CR can not only increase throughput but also avoid interference to PU, so two corresponding multi-user MIMO schemes are given and a parameter called transition radius is defined to help select two schemes optimally. Simulation shows that by using the proposed scheme system can achieve higher throughput gain over single antenna system, while the interference to PU is limited and no matter where the PU receiver is.

Keywords

MIMO communication; cognitive radio; MIMO cognitive radio system; multiple input multiple output system; multiuser MIMO scheme; primary user; transition radius; Interference; MIMO; Nickel; Receiving antennas; Throughput; Transmitting antennas; MIMO; block diagonalization; cognitive radio;

fLanguage

English

Publisher

ieee

Conference_Titel

Network Infrastructure and Digital Content, 2010 2nd IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-6851-5

Type

conf

DOI

10.1109/ICNIDC.2010.5657892

Filename

5657892