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A Fast Synchronization Scheme of OFDM Signals for High-Rate Wireless LAN
Takeshi ONIZAWA Masato MIZOGUCHI Masahiro MORIKURA Toshiaki TANAKA
Publication
IEICE TRANSACTIONS on Communications
Vol.E82-B
No.2
pp.455-463 Publication Date: 1999/02/25 Online ISSN:
DOI: Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Mobile Communication Keyword: wireless LAN, packet transmission, OFDM, multi-carrier modulation, AFC, symbol timing detection, carrier frequency error,
Full Text: PDF(442.1KB)>>
Summary:
This paper proposes a fast synchronization scheme with a short preamble signal for high data rate wireless LAN systems using orthogonal frequency division multiplexing (OFDM). The proposed OFDM burst format for fast synchronization and the demodulator for the proposed OFDM burst format are described. The demodulator, which offers automatic frequency control and symbol timing detection, enables us to shorten the preamble length to one quarter that of a conventional one. Computer simulation results show that the degradation in required Eb/N0 due to the synchronization scheme is less than 1 dB in a selective Rayleigh fading channel.
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