OFDMA uplink ranging for IEEE 802.16e using modified generalized chirp-like polyphase sequences

For uplink synchronization, IEEE 802.16e wireless metropolitan area networks group has suggested ranging for OFDMA based uplink system. However, it is inherently vulnerable to the channel selectivity and other users' interferences at low SNR. In this paper, a novel detection scheme for OFDMA ra...

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Bibliographic Details
Published in2005 1st IEEE and IFIP International Conference in Central Asia on Internet p. 5 pp.
Main Author Doo Hwan Lee
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Base stations
Chirp
Computer science
Frequency conversion
Frequency synchronization
GCL sequences
Interference
Metropolitan area networks
Peak to average power ratio
Ranging
Signal processing
Wireless LAN
WirelessMAN
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Summary:For uplink synchronization, IEEE 802.16e wireless metropolitan area networks group has suggested ranging for OFDMA based uplink system. However, it is inherently vulnerable to the channel selectivity and other users' interferences at low SNR. In this paper, a novel detection scheme for OFDMA ranging has been proposed using modified generalized chirp-like (GCL) sequences to cope with these drawbacks. Modifying GCL sequences, hybrid detection scheme which simultaneously carrying out non-coherent and differential detection can be achieved. The ranging performance has been considerably enhanced with this algorithm. Simulation results show that the proposed scheme is applicable to -3 dB with the mobility up to 50 km/h
ISBN:0780391799
9780780391796
DOI:10.1109/CANET.2005.1598197