Adaptive inter-symbol interference boost equalization apparatus and method
US6724839B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03522
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus mitigates inter-symbol interference effects on an oscillating signal from which digital data will be obtained at a receive end of a channel. The inter-symbol interference is introduced into the oscillating signal as a result of transmitting the oscillating signal through the transmission channel over a substantial distance from a transmit device to the receive end of the channel. A filter element receives an input signal from the transmit device and outputs a filtered signal within a predetermined frequency band. The filter element has a mechanism for adjusting a gain for a given range of frequencies within the predetermined frequency band. The given range of frequencies corresponds to higher frequencies in the predetermined frequency band. An amplitude determining mechanism determines a peak amplitude of the filtered signal. A boost gain control mechanism controls adjustments to the high frequency gain so that the peak-to-peak amplitude of the filtered signal is maintained within a predetermined amplitude range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.