Preamble detection based on repeated preamble codes
US8559569B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2012 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Apr 12, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2675
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems, methods, and other embodiments associated with preamble detection based on repeated preamble codes are described. According to one embodiment, an apparatus is provided that wirelessly receives a signal and calculates a differential output corresponding to a multiplication of the signal and a delayed version of the signal. A cross correlation is performed between the differential output and a known preamble pattern to produce a cross correlation output. A moving average calculation is performed on the cross correlation output to produce an average cross correlation. One or more peaks are detected in the average cross correlation when the average cross correlation has an amplitude greater than a threshold. When the one or more detected peaks meets predetermined criteria, the apparatus provides information about at least one of the detected peaks for subsequent signal processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.