Mitigating interaction between adaptive equalization and timing recovery in multi-rate receiver
US10404496B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2018 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Sep 7, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03681
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver including an equalizer disposed upstream of a decimator and capable of effectively preventing undesirable interaction between equalization adaptation and the overall timing recovery loop in cases of various data rates. The equalizer operates in a full operation rate even in the case of a lower-than-full data rate, e.g., half or quarter data rate. For input analog signal having 1/M of the full data rate (M>1), M or more Center of Filter (COF) values are determine. Each COF may be derived from a function of a respective set of tap weights and compared with a corresponding nominal COF to obtain a COF offset. The resultant COF offsets are used as indications of clock phase correction caused by equalization adaptation to adjust a set of selected tap weights. The taps selected for adjustment encompass at least M samples to correctly indicate the COF offset associate with one symbol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.