Research Article
Multiple CFO Compensation for IFDMA in High-Speed Wireless Communications
@INPROCEEDINGS{10.4108/eai.15-8-2015.2261028, author={Xianbing Zou and Gang Wang and Yue Xiao and Xiaojie Wen}, title={Multiple CFO Compensation for IFDMA in High-Speed Wireless Communications}, proceedings={10th EAI International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2015}, month={9}, keywords={interleaved frequency-division multiple-access carrier frequency offset inter-carrier interference}, doi={10.4108/eai.15-8-2015.2261028} }- Xianbing Zou
Gang Wang
Yue Xiao
Xiaojie Wen
Year: 2015
Multiple CFO Compensation for IFDMA in High-Speed Wireless Communications
CHINACOM
IEEE
DOI: 10.4108/eai.15-8-2015.2261028
Abstract
For the uplink interleaved single carrier frequency division multiple access (SC-FDMA) system, one of the main problems is that the multiple carrier frequency offsets (CFO), caused by Doppler shift in high-speed wireless communications, will cause severe inter-subcarrier interference (ICI), so as to influence the system performance. In this paper, we propose an effective multiple CFO compensation scheme, for reducing the ICI influence in the uplink interleaved SC-FDMA. On the one hand, the optimal CFO compensation value, which maximizes the signal-to-interference ratio (SIR), is achieved to compensate the CFO for each user at the receiver. On the other hand, the residual ICI is analyzed and an improved minimum mean square error (MMSE) frequency domain equalizer (FDE) receiver is developed which suppresses both ICI and noise. Theoretical analysis and simulation results show that the proposed CFO compensation scheme can effectively reduce the influence of ICI and im-prove the system performance.