Filter method and apparatus for polar modulation
US7447272B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2003 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Nov 5, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C5/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method includes providing an in-phase signal and a quadrature-phase signal (I/Q signals), processing the in-phase and quadrature phase signals to produce a magnitude signal and a phase signal, conditioning the phase signal to produce a conditioned phase signal, filtering the magnitude signal to produce a filtered magnitude signal, and amplifying the conditioned phase signal as a function of the filtered magnitude signal to produce a polar modulated signal. An apparatus includes a pair of I/Q channels, an I/Q to magnitude/phase circuit coupled to the pair of I/Q channels, a magnitude conditioning circuit coupled to the I/Q to magnitude/phase circuit; the magnitude conditioning circuit embodying a magnitude filter; a phase conditioning circuit coupled to the I/Q to magnitude/phase circuit, and an amplifier circuit coupled to the magnitude conditioning circuit and the phase conditioning circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.