A Joint Synchronization and Demodulation Scheme for UWB Systems

Yongwei QIAO
Tiejun LV

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.10    pp.2742-2752
Publication Date: 2010/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2742
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
demodulation,  direct sequence (DS) spread codes,  synchronization,  ultra-wideband (UWB),  

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In this paper, a joint blind synchronization and demodulation scheme is developed for ultra-wideband (UWB) impulse radio systems. Based on the prior knowledge of the direct-sequence (DS) spread codes, the proposed approach can achieve frame-level synchronization with the help of frame-rate samples. Taking advantage of the periodicity of the DS spread codes, the frame-level synchronization can be carried out even in one symbol interval. On the other hand, after timing acquisition, these frame-rate samples can be re-utilized also for demodulation. Thus the acquisition time and the implementation complexity are reduced considerably. The performance improvement can be justified by both theoretical analysis and simulation results, in terms of acquisition probability and bit error rate (BER).