Strategy for using the envelope information within a closed loop power control system

US7970364B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Christian Mayer · Kleinraming, AT
• Andreas Schwarz · Öpping, AT
• Nick Shute · Munich, DE
• Günter Märzinger · Eisenlohrsweg, AT
• Andrea Camuffo · Munich, DE
• Bernd Adler · Neubiberg, DE
• Michael Meixner · Haslach im Kinzigtal, DE
• Peter Bundgaard · Aalborg, DK

Key dates

• Filing date: May 30, 2008
• Grant date: Jun 28, 2011
• Expiry date: Jan 21, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W52/52
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A power control system includes a reference path filter used to suppress high frequencies in an input signal and generate a filtered envelope signal, a reference path amplifier to scale the filtered input signal based on a gain signal and generate a reference signal, a signal path amplifier to amplify an RF modulated signal and generate a signal path output signal scaled by a gain of an actuator signal, and a power detector to detect a power associated with the signal path output signal. The system includes an ADC to receive, pre-filter and convert the detected envelope signal into a measurement signal, and a comparator block to receive the reference signal and the measurement signal, and generate an error signal based on the difference, and a controller to generate the actuator signal for controlling the gain of the signal path amplifier based on the error signal.