TY - JOUR
T1 - Efficient structure-based carrier frequency offset estimation for interleaved OFDMA uplink
AU - Cao, Zhongren
AU - Tureli, Ufuk
AU - Yao, Yu Dong
PY - 2003
Y1 - 2003
N2 - In orthogonal frequency division multiple access (OFDMA), closely spaced multiple subcarriers are assigned to different users for parallel data transmissions. The subcarriers are overlapping but orthogonal to each other such that there is no inter-carrier interference. Carrier frequency offsets between the transmitters and the uplink receiver will cause the loss of the orthogonality among subcarriers, hence introduce inter-carrier interference resulting in multiple access interference. This paper proposes a carrier frequency offset estimation algorithm for the uplink of interleaved OFDMA systems. This algorithm requires only one OFDMA block and utilizes the inner structure of the signals without any aid from training symbols or the knowledge of channels. Simulation results illustrate the high accuracy and efficiency of the proposed estimation algorithm.
AB - In orthogonal frequency division multiple access (OFDMA), closely spaced multiple subcarriers are assigned to different users for parallel data transmissions. The subcarriers are overlapping but orthogonal to each other such that there is no inter-carrier interference. Carrier frequency offsets between the transmitters and the uplink receiver will cause the loss of the orthogonality among subcarriers, hence introduce inter-carrier interference resulting in multiple access interference. This paper proposes a carrier frequency offset estimation algorithm for the uplink of interleaved OFDMA systems. This algorithm requires only one OFDMA block and utilizes the inner structure of the signals without any aid from training symbols or the knowledge of channels. Simulation results illustrate the high accuracy and efficiency of the proposed estimation algorithm.
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M3 - Conference article
AN - SCOPUS:0038649084
SN - 0536-1486
VL - 5
SP - 3361
EP - 3365
JO - Conference Record - International Conference on Communications
JF - Conference Record - International Conference on Communications
T2 - 2003 International Conference on Communications (ICC 2003)
Y2 - 11 May 2003 through 15 May 2003
ER -