DBMsOL and FBMsOL power spectral density masks
US7633999B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2003 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Jul 27, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In accordance with one embodiment of the present invention, a power spectral density (PSD) mask for spectral shaping of a dual bit map (DBM) mode downstream transmission is provided. The PSD mask is represented by the equation:where PSDDBMsOL represents the PSD mask, KADSLOL represents a constant value, C represents a constant value, f represents a frequency of the downstream transmission, f0 represents a constant value, fLP3dB represents a 3 decibel (dB) low pass frequency and ffHP3dB represents a 3 dB high pass frequency. KADSLOL preferably has a value between 0.0900 watts and 0.1200 watts and more preferably has a value of 0.1104 watts. The constant f0 preferably has a value between 2.100 megahertz and 2.300 megahertz and more preferably has a value of 2.208 megahertz. The constant fLP3dB has a value substantially equal toThe constant fHP3dB has preferably has a value between 100 kilohertz and 150 kilohertz and more preferably has a value of 130 kilohertz. The constant C preferably has a value between 0.1 and 10 and more preferably has a value of 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.