Symbol timing maintainance to enable low duty cycle receiver operation
US5887031A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1997 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Jan 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for symbol timing maintenance in a communications receiver, in one embodiment, employs a receive channel, including a demodulator and an analog-to-digital converter for generating a plurality of samples; a symbol timing statistic generator for generating a symbol timing statistic in response to a portion of the plurality of samples; a noise estimator for generating an estimate of a noise level in response to the plurality of samples; a reception interval determiner for determining a reception interval; and a control loop for generating a signal indicative of symbol timing error. In an alternative embodiment, the system may, in addition to or instead of the noise estimator, and reception interval determiner, employ a bandwidth tuner for tuning a bandwidth of the control loop in response to the signal indicative of the symbol timing error having been generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.