Filtered multitone transmission application to DSL technologies
US6665349B1 · kind B1 · utility
20Cited by
0References
44Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 6, 2000 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Jan 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Transmission techniques suitable for use in digital subscriber line (DSL) systems such as very high rate digital subscriber line (VDSL) systems are described. One embodiment of the present invention describes a transmission technique related to OFDM from high-speed transmission over twisted-pair cables. The scheme, also known as filtered multitone modulation (FMT), exhibits significantly lower spectral overlapping between adjacent subchannels and provides higher transmission efficiency than discrete multitone modulation (DMT).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.