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Published Articles >> Table of Contents >> Abstract
18th International Conference on Advanced Information Networking and Applications (AINA'04) Volume 2
p. 223
Maximum Likelihood Estimation of Integer Frequency Offset for OFDM
Chen Chen, Xidian University, Xi'an
Jiandong Li, Xidian University, Xi'an
Gang Han, Xidian University, Xi'an
Min Sheng, Xidian University, Xi'an
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/AINA.2004.1283791
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| Abstract |
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One of the principal disadvantages of orthogonal
frequency division multiplexing (OFDM) is very sensitive
to frequency offset. Carrier frequency offset can be
divided into two parts: an integer one and a fractional
one. The integer frequency offset has no effect on the
orthogonality among the subcarriers, however causes a
circular shift of the received data symbols, resulting in a
BER of 0.5. In this paper, the maximum likelihood (ML)
estimation algorithm of the integer frequency offset is
derived under the assumption that the channel
impairments only consist of additive noise. Simulation
results show that it can perform well even in a time-dispersive
channel. Its performance is assessed and
compared with the conventional method by computer
simulations for the additive white Gaussian noise (AWGN)
channel and a multipath fading channel.
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 Additional Information
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Citation:
Chen Chen, Jiandong Li, Gang Han, Min Sheng,
"Maximum Likelihood Estimation of Integer Frequency Offset for OFDM,"
aina,
p. 223,
18th International Conference on Advanced Information Networking and Applications (AINA'04) Volume 2,
2004
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