Reducing Multi-user Interference through Rotation Matrix

Author

Ci, Qingyu

Author_Institution

Dept. of Comput. & Commun. Eng., Weifang Univ., Weifang, China

Volume

2

fYear

2011

fDate

24-25 Sept. 2011

Firstpage

272

Lastpage

274

Abstract

A new method through rotation matrix in MIMO system is proposed in this paper, which increases the distance of code-words and decreases the pair wise error probability. Compared with some traditional ways, this method is bandwidth-efficient. A detection method MMSE-ML is used for the simple algorithm. The computer simulation results confirmed that in high SNR, this method can efficient decrease multi-user interference without any coding or bandwidth expansion. Using MMSE-ML detection, 3.2E-3 BER reached at 22 dB SNR.

Keywords

encoding; error statistics; interference (signal); least mean squares methods; matrix algebra; maximum likelihood detection; multi-access systems; multiuser detection; BER; MIMO system; MMSE-ML detection; SNR; bandwidth expansion; bandwidth-efficient; code-words; coding; computer simulation; detection method; multiuser interference reduction; pair wise error probability; rotation matrix; Bandwidth; Complexity theory; Encoding; Interference; Receiving antennas; Signal to noise ratio; Transmitting antennas; ML detection; MMSE detection; Rayleigh fading; multi-user interference;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Technology, Computer Engineering and Management Sciences (ICM), 2011 International Conference on

Conference_Location

Nanjing, Jiangsu

Print_ISBN

978-1-4577-1419-1

Type

conf

DOI

10.1109/ICM.2011.164

Filename

6113520