@inproceedings{89d7f2f7b3344c04930bcabdf07b16d5,
title = "A technique for reducing frame synchronization errors in OFDM UWB systems with multipath",
abstract = "The two polarities of frame synchronization error have asymmetric effects on the performance of a coherent orthogonal frequency-division multiplexing (OFDM) system. A negative (early) estimate of the frame start is equivalent to a shift of the effective channel seen by the receiver and therefore have less undesirable effect on the system performance. A positive (late) estimate of the frame start will cause significant interchannel and inter-symbol interference (ICI and ISI) and thus significant performance degradation. We study adaptive time shift schemes for converting a late estimation to an early one, so that the BER is minimized for the multiband OFDM ultrawideband (UWB) system. The shift schemes are based on the unique preamble structure of the system and its associated channel estimation algorithm. The performance evaluations are carried out using the specified 802.15.3a multipath channels. Of the three schemes studied, the one named biased adaptive shift is found to be the best; it yields results close to those for the optimal static shift, but without requiring knowledge of the channel.",
author = "Guofeng Lu and Predrag Spasojevic and Larry Greenstein",
note = "Publisher Copyright: {\textcopyright} 2005 IEEE.; 62nd Vehicular Technology Conference, VTC 2005 ; Conference date: 25-09-2005 Through 28-09-2005",
year = "2005",
doi = "10.1109/VETECF.2005.1557473",
language = "English (US)",
series = "IEEE Vehicular Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "68--72",
booktitle = "VTC 2005-Fall",
address = "United States",
}