System and method for five-level non-causal channel equalization
US7139325B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2002 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03356
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method are provided for five-level non-casual channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing a five-level threshold; comparing the first bit estimate to a second bit value received prior to the first bit; comparing the first bit estimate to a third bit value received subsequent to the first bit; and, in response to the comparisons, determining the value of the first bit. Establishing a five-level threshold includes: establishing thresholds to distinguish a first bit value when the second and third bit values are a “1” value, when the second bit value is a “1” and the third bit value is a “0”, when the second bit value is a “0” and the third bit value is a “1”, when the second and third bit values are a “0” value, and an approximate midway threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.