Timing tracking in communications systems
US5832046A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1996 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Jul 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a TDMA cellular communications system, optimal sampling of symbols in an information sequence is maintained by a method of timing tracking in which, recursively, indirect variables of a linear complex vector are estimated from received samples and previous estimates of the indirect variables, the sampling delay, and a complex fading factor, and the complex fading factor and the sampling delay are estimated by non-linear transformations of the estimated indirect variables. The timing tracking follows a timing recovery process which produces initial estimates. An implementation of the method uses a Kalman filter having constant filter gains and a transformation of the received samples and sampling delay to a reduced time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.