Carrier wave synchronization for multi-level two-dimensional modulation alphabets
US6008692A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1997 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Aug 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3827
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a method for realizing carrier wave synchronization in the receptio of a multi-level, two-dimensional modulation signal, the received signal is demodulated by using at least one local oscillator (3) in order to generate the local oscillator frequency. In the method, the local oscillator (3) performs a frequency scanning within the frequency range of the reception; during the frequency scanning, a demodulated signal point system is formed of the received signal by using the frequency generated by the local oscillator (3). Furthermore, the demodulated signal point system in the method is examined in order to determine at which point of time the frequency of the local oscillator is synchronized to the carrier wave frequency of the received modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.