Syncword detecting circuit and a baseband signal receiving circuit
US7558355B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2004 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Dec 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/042
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A predetermined syncword detecting circuit includes a matched-bit-number comparing circuit, a comparing-result-change detecting circuit, a detected-result storing circuit, a total number detecting circuit, and a syncword detecting circuit. The matched-bit-number comparing circuit acquires and compares a number of bits in a baseband signal that matches bits of the predetermined syncword with a threshold. The comparing-result-change detecting circuit samples the comparison result, and detects changes in the comparison result. The detected-result storing circuit sequentially stores a result of the comparing-result-change detecting circuit. The total-number detecting circuit detects a total number of the result of the matched-bit-number comparing circuit. The result is included in an N cycle period and surpasses the threshold. The syncword detecting circuit detects the predetermined syncword and selects an intermediate phase of the cycles as a detection phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.