Title :
Reducing Multi-user Interference through Rotation Matrix
Author_Institution :
Dept. of Comput. & Commun. Eng., Weifang Univ., Weifang, China
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;
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
DOI :
10.1109/ICM.2011.164
