In this paper, the problem of frame-level symbol
timing acquisition for UWB signals is addressed. The main goal
is the derivation of a frame-level timing estimator which does not
require any prior knowledge of neither the transmitted symbols
nor the received template waveform. The independence with
respect to the received waveform is of special interest in UWB
communication systems, where a fast and accurate estimation of
the end-to-end channel response is a challenging and computationally
demanding task. The proposed estimator is derived under the
unconditional maximum likelihood criterion, and because of the
low power of UWB signals, the low-SNR assumption is adopted. As
a result, an optimal frame-level timing estimator is derived which
outperforms existing acquisition methods in low-SNR scenarios.
CitationLópez Salcedo, J. A.; Vázquez Grau, G. Waveform-independent frame-timing acquisition for UWB signals. IEEE Transactions on Signal Processing, 2007, vol. 55, núm. 1, p. 279-289.
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