Signalling packet for communication system with reference modulated in accordance with a time-dependent law
US5936961A · kind A · utility
25Cited by
5References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Feb 6, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/0035
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signalling packet for a communication system has a reference signal to support time and frequency synchronization. The reference signal is modulated so that it varies with time according to a predetermined modulation law. The variation is with respect to both the I and Q channels. Because of the variation with time, receivers can synchronize in frequency and in time with a base station in a simplified manner. Doppler shift can be determined and compensated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.