Methods and systems for tone hopping
US7443784B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2007 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jul 12, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems for tone hopping are provided. In one embodiment, a method for an orthogonal frequency division multiplexing (OFDM) multipoint-to-point communications system comprises: establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; transmitting up to a plurality of tones from the first remote unit modulated with upstream information using OFDM; adjusting at least one characteristic of the up to a plurality of tones such that when any tones are transmitted from the first remote unit and at least one other remote unit of the plurality of remote units, the orthogonality of the tones received at the host unit is improved; and dynamically switching modulation between tones of the up to a plurality of tones based on an error-rate history of at least one of the tones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.