Title :
Multiuser interference suppression for the uplink of interleaved MIMO OFDMA
Author :
Wei Han ; Gang Wang
Author_Institution :
Syst. Simulation Dept., Zhong xing Telecommun. Equip. Corp., Shanghai, China
Abstract :
In the uplink of multiple-input multiple-output (MIMO) orthogonal frequency division multiple access (OFDMA) systems, multiuser interference (MUI) occurs due to carrier frequency offsets (CFOs). In this paper, a novel scheme is presented to suppress MUI for the interleaved MIMO OFDMA system. The first stage is to compensate the multiple CFOs, which is based on a calculation of optimum CFO correction value maximizing the average signal-to-interference ratio (SIR). And the second stage uses minimum mean square error (MMSE) frequency domain equalizer (FDE), considering the residual MUI as additive noise, to further improve the systems´ performance. Simulation results show that the proposed scheme exhibits a significant improvement over conventional scheme.
Keywords :
MIMO communication; OFDM modulation; frequency division multiple access; interference suppression; mean square error methods; CFO correction value; MMSE; MUI; SIR; additive noise; carrier frequency offsets; interleaved MIMO OFDMA system; interleaved MIMO OFDMA uplink; minimum mean square error; multiple-input multiple-output; multiuser interference suppression; orthogonal frequency division multiple access; signal-to-interference ratio; system performance; Additive noise; MIMO; OFDM; Receiving antennas; Signal to noise ratio; Transmitting antennas; Uplink;
Conference_Titel :
Communications, Circuits and Systems (ICCCAS), 2013 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-3050-0
DOI :
10.1109/ICCCAS.2013.6765179
