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In this paper, a novel scheme is developed for chip-level timing in UWB communications. To accomplish the proposed algorithm, the Time Hopping (TH) code is transformed to the Spread Time Hopping (STH) code firstly, without changing ideas of UWB modulation. Invoking the cyclic autocorrelation of STH code, the timing parameter is acquired without training sequence. Desirable performance is brought out even if a few data is utilized for timing acquisition. Simulations are presented to validate the promising performance of the proposed scheme.
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