Digital receiver fast frequency and time acquisition system using a single synchronization word and method of using same
US7035364B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Aug 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0036
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital receiver fast frequency and time acquisition system (200) for accurately providing both time and frequency synchronization to an incoming data stream with minimal delay to prevent any loss of incoming digital information. The invention provides synchronization with only a single synchronization word and includes a first channel select (CS) filter (204) that filters an incoming digital signal (202). A frame synchronization detector (206) then recognizes the time synchronization word from the first filtered signal. A coarse symbol time estimator (208) is then used for coarsely adjusting the time synchronization of the digital signal from the frame synchronization detector (206) and a fine frequency estimator (210) finely adjusts the frequency of the signal from the coarse symbol time estimator (208) for providing a frequency adjusted signal. A mixer (212) then combines the incoming digital signal with the frequency adjusted signal and provides a time and frequency compensated digital signal. A second CS filter (214) filters the frequency compensated digital signal and a fine symbol time estimator (216) works to determine symbol timing with greater precision. Finally, a symb…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.