Method and arrangement for synchronization in OFDM modulation
US5726973A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1996 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Aug 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2662
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and an arrangement for synchronization in OFDM modulation. Frequency errors of an IF clock and a sampling clock are controlled by estimating the deviation of the sampling clock and, respectively, the IF clock for two subcarriers with different frequencies. According to the invention, the frequencies are chosen symmetrically around zero and the absolute phase errors are detected for both subcarriers. Timing errors and phase errors are formed from the absolute phase errors in order to generate two control signals. The first control signal is formed from the deviation of the sampling clock and the timing error for controlling the sampling clock while the second control signal is formed from the deviation of the IF clock and the phase error for controlling the IF clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.