ETRI Journal
- Volume 30 Issue 4
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- Pages.495-505
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- 2008
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- 1225-6463(pISSN)
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- 2233-7326(eISSN)
Initial Timing Acquisition for Binary Phase-Shift Keying Direct Sequence Ultra-wideband Transmission
- Kang, Kyu-Min (IT Convergence Technology Research Laboratory, ETRI) ;
- Choi, Sang-Sung (IT Convergence Technology Research Laboratory, ETRI)
- Received : 2007.12.04
- Accepted : 2008.06.27
- Published : 2008.08.30
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-to-digital 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,
Keywords
- Direct sequence ultra-wideband (DS-UWB);
- timing acquisition;
- searcher;
- correlator;
- parallel processing