Synchronization method, and associated circuitry, for improved synchronization of a receiver with a transmitter using early-late testing during coarse synchronization
US5805646A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Oct 8, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A synchronization method and apparatus for synchronizing a receiver, such as a radiotelephone operable in a cellular communication system with a transmitter. A synchronization signal is transmitted within a multiframe of a control signal to the receiver, which upon powering up detects an undifferentiated digital bit stream and divides the bits into a succession of discrete portions or bins. Energy accumulations within each such portion are calculated, and a space-profile metric of those portions falling within a synchronization burst pattern computed. Space-profile metrics of adjacent portions are also computed. Taking the differences between a given portion and portions prior to and after the given portion, a difference metric is utilized to better predict the occurrence of a multiframe boundary, facilitating synchronization, despite the presence of other high-power bursts within the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.