Method and apparatus for outbound wave subtraction using a variable offset amplifier
US7155006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2001 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Jun 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/063
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for outbound wave subtraction using a variable offset amplifier is described. The method includes calibration of a bi-directional signaling circuit in order to calculate one or more offset codes for cancellation of an outbound wave within a bi-directional communications link. Once the one or more offset codes are calculated, it is determined whether a dual inbound wave is received by the bi-directional signaling circuit. Once received, an offset code from the one or more calculated offset codes is selected according to a value of an outbound wave within the dual inbound/outbound wave. Finally, the outbound wave is cancelled from the dual inbound wave at an output of a variable offset amplifier using the selected offset code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.