Adaptive equalizer method and apparatus
US5245556A · kind A · utility
11Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Sep 15, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03019
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An equalizer is arranged for equalizing a received signal comprising 2-binary, 1-quaternary-coded multi-level signals S(-3), S(-1), S(+1), S(+3) corresponding to predetermined signal levels -3, -1, +1, +3, respectively. The equalizer includes a gain unit (107) with an adjustable gain, a filter (111) with an adjustable pole and zero, and a processor (119). The processor adjusts the equalizer by sampling equalized S(+3) signals and adjusting the gain, the pole and the zero so that the average value of the equalized S(+3) signals is substantially equal to +3 volts and the variance of the equalized S(+3) signals is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.