@article{5579f6d0ff7011de9a61000ea68e967b,
title = "Multi-user interference cancellation schemes for carrier frequency offset compensation in uplink OFDMA",
abstract = "Each user in the uplink of an Orthogonal Frequency Division Multiple Access (OFDMA) system may experience a different carrier frequency offset (CFO). These uncorrected CFOs destroy the orthogonality among subcarriers, causing inter-carrier interference and multi-user interference, which degrade the system performance severely. In this paper, novel time-domain multi-user interference cancellation schemes for OFDMA uplink are proposed. They employ an architecture with multiple and numerical evaluations show that the proposed schemes achieve a significant performance gain compared to the conventional receiver and a reference frequency-domain multi-user interference cancellation scheme. In a particular scenario, a maximum CFO of up to 40% of the subcarrier spacing can be tolerated, and the CFO-free performance is maintained in the OFDMA uplink. The proposed schemes outperform the multi-user interference cancellation techniques for Orthogonal Frequency Division Multiple Access (OFDMA) available in literature with comparable or lower complexity.",
keywords = "synchronization, OFDMA, uplink, synchronization, OFDMA, uplink, timing offset, frequency offset, multiuser, interference, cancellation",
author = "Nguyen, {Huan Cong} and {De Carvalho}, Elisabeth and Ramjee Prasad",
year = "2014",
month = mar,
doi = "10.1109/TWC.2014.021414.070718",
language = "English",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "IEEE",
}