Apparatus and method for processing reduced bandwidth envelope tracking and digital pre-distortion
US8649746B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2012 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Sep 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0028
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for processing reduced bandwidth Envelope Tracking (ET) and Digital Pre-Distortion (DPD) are provided. The apparatus includes a Crest Factor Reduction (CFR) unit, a resealing Digital Pre-Distortion (DPD) unit, an envelope converter, a Supply Modulator (SM), and a Power Amplifier (PA). The CFR unit suppresses an increase of a side lobe occurring when a Peak to Average Power Ratio (PAPR) decreases with respect to a signal generated in a baseband according to a standard and passes through a transmit (Tx) filter. The resealing DPD unit receives an original envelope amplitude and a reduced bandwidth envelope amplitude of an In-phase/Quadrature-phase (I/Q) signal output from the CFR unit to perform a pre-distortion process. The envelope converter converts an envelope signal to a reduced bandwidth envelope signal based on the I/Q signal output from the CFR unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.