On time-of-arrival estimation in dense ultra-wideband channels

被引:1
|
作者
Aedudodla, Sandeep R. [1 ]
Wong, Tan F. [1 ]
机构
[1] Univ Florida, Wireless Informat Networking Grp, Gainesville, FL 32611 USA
关键词
D O I
10.1109/ICCCAS.2006.284885
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
We derive a pilot-assisted maximum likelihood (ML) timing estimator for ultra-wideband radio systems for the realistic scenario in which the received pulse shape and the channel are unknown. We compare the performance of the ML timing estimator to the Cramer-Rao bound and to sub-optimal methods such as the dirty-template method and a delay-correlate timing estimator for transmitted reference systems, both of which do not require knowledge of the channel and received pulse shape. The performance results indicate that, at medium-to-high signal-to-noise ratios, the NIL estimator significantly outperforms the sub-optimal schemes, especially in non-line-of-sight channels.
引用
收藏
页码:1315 / +
页数:3
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