Title :
Maximum likelihood estimation of OFDM carrier frequency offset
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Syracuse Univ., NY, USA
fDate :
4/1/2002 12:00:00 AM
Abstract :
We develop a maximum likelihood estimate for orthogonal frequency division multiplexing (OFDM) carrier frequency offset in the presence of virtual carriers. It is found that the resulting estimate has an identical form to that of a previously proposed blind OFDM carrier frequency offset estimate by Liu and Tureli (see IEEE Commun. Lett., vol.2, p.104-106, 1998). Insights are provided as to why these two algorithms are equivalent.
Keywords :
OFDM modulation; fading channels; maximum likelihood estimation; multipath channels; signal classification; MUSIC-like algorithm; blind OFDM carrier frequency offset estimate; broadband wireless communications; intuitive projection argument; maximum likelihood estimation; multiplexing multipath fading; orthogonal frequency division multiplexing; virtual carriers; Delay effects; Discrete Fourier transforms; Fading; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM modulation; Robustness; Wireless LAN;
Journal_Title :
Signal Processing Letters, IEEE
