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High performance coherent demodulator for wireless ATM systems-offset-QPSK simultaneous carrier and bit-timing recovery scheme

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2 Author(s)
Matsumoto, Y. ; NTT Wireless Commun. Syst. Labs., Kanagawa, Japan ; Umehira, M.

This paper proposes a novel OQPSK coherent demodulator suitable for wireless ATM systems. The evaluation results show that the proposed demodulator achieves a bit error rate performance close to the theoretical performance over an AWGN channel with a preamble of less than ten symbols. Moreover, the proposed demodulator surpasses differential detection (evaluated for QPSK with a hard-wired clock) over Rician fading channels typical of wireless ATM (WATM) systems with directional antennas or LOS paths achieving agile synchronization. The proposed demodulator is a strong candidate for receivers of wireless ATM systems

Published in:

Vehicular Technology Conference, 1997, IEEE 47th  (Volume:1 )

Date of Conference:

4-7 May 1997