Method and apparatus for adaptive data allocation in a multi-carrier communication system
US6738418B1 · kind B1 · utility
25Cited by
12References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2000 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Apr 3, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26414
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An xDSL modem having an adaptively adjustable guard band comprising a finite number of spaced-apart frequency bins between the upstream and downstream frequencies. The guard band is adjusted by selecting one from among a plurality of filters belonging to a filter bank of the receiver circuitry. A weighted loss in data capacity is calculated when each of the candidate filters are used, and the filter which gives the lowest loss in data capacity, subject to certain criteria, is used. The adjustment is made pursuant to noise and signal characteristics measured during start or restart of an xDSL communications session.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.