Initial Timing Acquisition for Binary Phase-Shift Keying Direct Sequence Ultra-wideband Transmission

다국어 초록 (Multilingual Abstract)

This paper presents a parallel processing searcher
structure for the initial synchronization of a direct
sequence ultra-wideband (DS-UWB) system, which is
suitable for the digital implementation of baseband
functionalities with a 1.32 Gsample/s chip rate analog-todigital
converter. An initial timing acquisition algorithm
and a data demodulation method are also studied. The
proposed searcher effectively acquires initial symbol and
frame timing during the preamble transmission period. A
hardware efficient receiver structure using 24 parallel
digital correlators for binary phase-shift keying DS-UWB
transmission is presented. The proposed correlator
structure operating at 55 MHz is shared for correlation
operations in a searcher, a channel estimator, and the
demodulator of a RAKE receiver. We also present a
pseudo-random noise sequence generated with a primitive
polynomial, 1+x2+x5, for packet detection, automatic gain
control, and initial timing acquisition. Simulation results
show that the performance of the proposed parallel
processing searcher employing the presented pseudorandom
noise sequence outperforms that employing a
preamble sequence in the IEEE 802.15.3a DS-UWB
proposal.

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