Ultra-wideband signal acquisition with hybrid DS-TH spreading
The usage of long spreading sequences and the fine timing resolution result in a large search space during acquisition in ultra-wideband (UWB) systems. This paper presents a two-stage signal acquisition scheme for UWB systems employing a hybrid signaling format involving direct sequence (DS) spreadi...
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| Veröffentlicht in: | IEEE transactions on wireless communications 2006-09, Vol.5 (9), p.2504-2515 |
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| container_title | IEEE transactions on wireless communications |
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| creator | Aedudodla, S.R. Vijayakumaran, S. Wong, T.F. |
| description | The usage of long spreading sequences and the fine timing resolution result in a large search space during acquisition in ultra-wideband (UWB) systems. This paper presents a two-stage signal acquisition scheme for UWB systems employing a hybrid signaling format involving direct sequence (DS) spreading and time hopping (TH), which significantly reduces the search space. The resulting acquisition system consists of two stages, one each for the acquisition of the TH and DS sequences. The dense multipath channel typical of UWB systems implies that there can exist more than one phase to which the receiver can lock on and achieve satisfactory demodulation performance subsequent to acquisition. We define the set of such phases as the hit set. The hybrid signaling format coupled with the multi-phase hit set help significantly improve the acquisition performance of the UWB system. The performance of the proposed acquisition system, measured in terms of the mean detection time, is evaluated analytically and supported by computer simulation |
| doi_str_mv | 10.1109/TWC.2006.1687774 |
| format | Article |
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| subjects | Acquisitions Acquisitions & mergers Applied sciences Channels Computer simulation Demodulation Exact sciences and technology Format Marketing Mathematical analysis Multipath channels Performance analysis Searching Signal processing Signal resolution Spreading Studies Switching and signalling Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Time measurement Timing Ultra wideband technology Uncertainty |
| title | Ultra-wideband signal acquisition with hybrid DS-TH spreading |
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