Real-time optimization of TX FIR filter for high-speed data communication
US8452829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2008 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Mar 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0058
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A feedback module is defined to receive as input a set of data sample signals and a set of reference sample signals. Each of the data and reference sample signals is generated by sampling a differential signal having been transmitted through a FIR filter. The feedback module is defined to operate a respective post cursor counter for each post cursor of the FIR filter and update the post cursor counters based on the received sets of data and reference sample signals. Also, the feedback module is defined to generate a tap weight adjustment signal for a given tap weight of the FIR filter when a magnitude of a post cursor counter corresponding to the given tap weight is greater than or equal to a threshold value. An adaptation module is defined to adapt a reference voltage used to generate the reference sample signals to a condition of the differential signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.