Amplitude and phase shift keying modulation for saturated amplifier systems
US9503294B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2016 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Jun 14, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/045
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An amplitude and phase modulation circuit for modulating an M-ary digital signal having pulses onto a carrier wave for transmission by direct digital synthesis. The modulation circuit includes a digital source that generates a digital signal including pulses representing logical 1s and no pulses representing logical zeros, where a group of M pulses represents a constellation point to be transmitted. The modulation circuit further includes a phase control circuit that provides phase control and an amplitude control circuit that provides pulse width control for the constellation point to be transmitted. A saturated amplifier amplifies the phase and amplitude controlled digital signal and a filter integrates and averages the digital signal to remove noise from the signal so as to convert the digital signal to an analog signal, where the digital source operates to reduce the amplifier power consumption requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.