A joint scheme of decision-directed channel estimation and weighted-average phase error tracking for OFDM WLAN systems

Author

Yu, E-Hsin ; Liu, Hsuan-Yu ; Hsu, Terng-En ; Lee, Chen-Yi

Author_Institution

Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu

Volume

2

fYear

2004

fDate

6-9 Dec. 2004

Firstpage

985

Abstract

In this paper, a joint scheme of decision-directed channel estimation (DDCE) and weighted-average phase error tracking (WAPET) for OFDM WLAN systems is presented. With algorithm exploration, the proposed joint scheme makes synchronization more robust to overcome time-variant multipath fading, carrier frequency offset, and sampling clock offset. In CE accuracy measurement, the proposed joint scheme achieves better 8~20 dB gain in estimation mean-square-error compared with conventional approaches. In system simulation, the proposed scheme contributes 2.15~2.3 dB gain in SNR for 10% packet error rate (PER) demanded by IEEE 802.11a in 6 Mbits/s~54 Mbits/s transmission modes

Keywords

OFDM modulation; channel estimation; mean square error methods; phase noise; synchronisation; wireless LAN; IEEE 802.11a physical layer; OFDM WLAN systems; SNR; carrier frequency offset; decision directed channel estimation; mean square error estimation; packet error rate; sampling clock offset; synchronization; time variant multipath fading; transmission modes; weighted average phase error tracking; Channel estimation; Clocks; Error analysis; Fading; Frequency synchronization; Gain measurement; OFDM; Robustness; Sampling methods; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on

Conference_Location

Tainan

Print_ISBN

0-7803-8660-4

Type

conf

DOI

10.1109/APCCAS.2004.1413046

Filename

1413046