Timing offset compensation in orthogonal frequency division multiplexing systems
US7251283B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2003 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Nov 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0202
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A robust timing offset compensation scheme for multi-carrier systems. According to the invention, a timing offset compensator is provided to compensate a current symbol in the frequency domain for the effect of timing offset with a timing offset prediction value. Then a timing error estimator calculates a timing error value for the current symbol based on a function of a phase tracking value, a channel response of each pilot subcarrier, transmitted data on each pilot subcarrier, and a timing compensated version of the current symbol on the pilot subcarrier locations. Furthermore, a timing tracking unit receives the timing error value of the current symbol to generate a shift amount of the DFT window and the timing offset prediction value for a next symbol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.