Inter-symbol interference canceller
US7277514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2002 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Feb 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03611
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a device for cancelling inter-symbol interference in a sampled digital signal. The device comprises a first filter, for which the optimum transfer function is identical to that of the transmission channel, and which receives a sequence of samples ({{tilde over (d)}n}nεN) representative of the digital signal sent to the input of the transmission channel, a subtractor circuit to subtract the first filter output ({{tilde over (d)}′n}nεN) from the sequence of input samples ({rn}nεN), a second filter tuned to the transmission channel, with an optimum transfer function H*(f), to which the output ({en}nεN) from the subtractor circuit is input, and an adder circuit designed to add the output from the second filter to the sequence of samples ({{tilde over (d)}n}nεN) representative of the digital signal sent to the input of the transmission channel, and thus generating a sequence of complex symbols ({n}nεN) without any inter-symbol interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.