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For the uplink transmission of an orthogonal frequency division multiple access (OFDMA) system, frequency synchronization is particularly challenging due to the presence of multiple Carrier Frequency Offsets (CFOs), which destroy the orthogonality among subcarriers and introduce massive multiuser interference (MUI) and inter-carrier interference (ICI). To prevent the consequent performance degradation,...
This paper examines the carrier frequency offset (CFO) estimation problem in the orthogonal frequency division multiple access (OFDMA) uplink systems, which is very challenging due to the presence of multiple CFOs. The existing solutions to this problem are either too complex to implement or not flexible in subcarrier allocation. To solve these problems, this paper proposes a tile-structure based...
For the uplink transmission of an OFDMA system, frequency synchronization is particularly challenging due to the presence of multiple Carrier Frequency Offsets (CFOs). This problem is investigated in this paper, and we propose a novel low complexity pilot aided frequency synchronization algorithm based on two consecutive OFDMA blocks, which are assigned with identical tile structure and pilot symbols...
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