Apparatus and method to reduce power amplifier noise generation in a multiplexed communication system
US6404824B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1998 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Dec 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In order to reduce the noise components in a multiplexed communication system, noise components generally referred to as splatter that from the rapid transition between the transmitting state and the non-transmitting state, this power transition in the transmitted signal is provided with a ramped envelope. In the preferred embodiment, the ramped power transition is the result of a ramped enabling signal applied to the power amplifier generating the transmitted signal. The use of a ramped power transition reduces the noise introduced as a result of an abrupt power transition. In addition, the transmitted signal is provided with a preamble so that no data is transmitted during the transition period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.