Title :
Residual carrier frequency offset tracking for OFDM-based systems
Author :
Li, Chih-Peng ; Chen, Po-Lin ; Lin, Tsui-Tsai
Author_Institution :
Inst. of Commun. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
In this work, four tracking schemes are analyzed for OFDM-based systems and simulation experiments are performed for an IEEE 802.11a WLAN system. The first scheme is a newly proposed symbol-by-symbol method, which estimates the carrier phase offset of each OFDM symbol and then appropriate compensation is made. The other three schemes, namely L-extension algorithm, D symbol algorithm and maximum likelihood estimation, estimate the residual carrier frequency offset and results are coupled to the local oscillator.
Keywords :
OFDM modulation; error compensation; frequency estimation; maximum likelihood estimation; oscillators; wireless LAN; D symbol algorithm; IEEE 802.11a WLAN system; L-extension algorithm; OFDM based systems; OFDM symbol; carrier phase offset estimation; local oscillator; maximum likelihood estimation; orthogonal frequency division multiplexing; phase error compensation; residual carrier frequency offset estimation; residual carrier frequency offset tracking; symbol-by-symbol method; Clocks; Frequency estimation; Frequency synchronization; Interference; Local oscillators; Maximum likelihood estimation; OFDM; Phase estimation; Sampling methods; Wireless LAN;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1413047
