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

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4 Author(s)
Yi-Hsin Yu ; Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu ; Hsuan-Yu Liu ; Terng-Yin Hsu ; Chen-Yi Lee

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

Published in:

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on  (Volume:2 )

Date of Conference:

6-9 Dec. 2004