Method of synchronizing an independent data device of a wireless data communications system on an incident pulsed signal of the ultra wide band type, and corresponding independent data device
US7254202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Feb 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/6908
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An incident signal contains a preamble including a training sequence having a series of pulses whose polarity and time shifts are defined by respective polarity code and time-hopping code. A method includes a digital cross-correlation of the received signal with the training sequence. The cross-correlation algebraically sums in accordance with the polarity code windows of the received signal. The starting points of the windows are determined by the time-hopping code. The cross-correlation further includes detecting the end point of the preamble from the result of the digital cross-correlation. When the size of the receiving buffer, i.e., the size of the window is smaller than the number N of samples of each replica of the training sequence, it is particularly advantageous that the digital cross-correlation be performed iteratively in a block-by-block fashion. The computation of each block is split into M slices which are computed by algebraically summing windows N/M samples long.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.