Timing recovery apparatus and a diversity communication apparatus using the same
US6104762A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Dec 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The timing recovery apparatus and the diversity communication apparatus using the same realizes a high-speed timing phase pull-in characteristic and a low-jitter characteristic at the time of power-on sequence, recovery from line disconnection and the like. The apparatuses also prevent the bit error rate characteristic and synchronization characteristic from being deteriorated by signal delay time difference. A received PSK signal is X-times oversampled. From received phase data sequences Y.sub.i obtained by the X-times oversampling, a data sequence including j symbol frequency components not affected by carrier frequency deviation is extracted by signal processing including simple adding and subtracting operations. The data sequence including j symbol frequency components is synthesized to provide two data sequences including symbol frequency components having a good S/N ratio with .pi./4 phase difference in radian and not affected by carrier frequency deviation. Further, a data sequence including two symbol frequency components is used for timing regeneration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.