Rapid reference acquisition and phase error compensation for radio transmission of data
US4847869A · kind A · utility
31Cited by
16References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1987 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Dec 4, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The method and apparatus for rapid phase acquisition and random radio channel phase error compensation for a TDMA QPSK receiver is disclosed. Received quadrature signals having a known synchronizing sequence transmitted on one of the vectors is correlated to a local replica of the sequence. The output correlation detection signals are held for the duration of the TDMA timeslot and multiplied by the received quadrature signals to produce two pairs of products. The mutually exclusive product pairs are summed to recover data having the random phase error compensated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.