Design and analysis of packet synchronizer in dual-mode DSSS/OFDM wireless systems

Authors:
Jin-Hwa Guo;Jui-Yuan Yu;Terng-Yin Hsu
Affiliations:
Department of Computer Science and Information Engineering, National Chiao-Tung University, Hsinchu City, Taiwan, R.O.C;Department of Computer Science and Information Engineering, National Chiao-Tung University, Hsinchu City, Taiwan, R.O.C;Department of Computer Science and Information Engineering, National Chiao-Tung University, Hsinchu City, Taiwan, R.O.C
Venue:
EHAC'05 Proceedings of the 4th WSEAS International Conference on Electronics, Hardware, Wireless and Optical Communications
Year:
2005

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Abstract

In this paper, a packet detection algorithm for the coexistence of dual DSSS/OFDM system; and an algorithm for OFDM symbol timing estimation are proposed. Using only one pair of ADCs with dynamic sampling, the preamble based packet synchronizer can successfully detect both DSSS/OFDM systems while achieving low-power consumption. From simulation results, the false alarm rate can be less than 10-3 under SNR = 1.2 dB and SNR = 3.2 dB with respect to DSSS and OFDM wireless systems.