Calibration of a N-port receiver

US6735261B1 · kind B1 · utility

Assignees

• Sony International (Europe) GmbH · DE
• SONY GROUP CORPORATION · JP

Inventors

• Gerald Oberschmidt · Fellbach, DE
• Veselin Brankovic · Eßlingen, DE
• Dragan Krupzevic · Stuttgart, DE
• Masayoshi Abe · Tokyo, JP
• Tino Konschak · Stuttgart, DE
• Thomas Dölle · Chemnitz, DE

Key dates

• Filing date: Jul 7, 2000
• Grant date: May 11, 2004
• Expiry date: Feb 27, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L27/2331
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A technique for calibrating a N-port receiver, such as for example a 5- or 6-port receiver is proposed. The N-port receiver (1) comprises a first input (2) for a RF signal to be detected, a second input (3) for a RF signal originating from a local oscillator (4) and N−2 output terminals. Calibrating signals are generated on the basis of the RF signal supplied by the local oscillator (4). The calibration signals are fed to the first input (2) and/or the second input (3) of the N-port receiver (1). Calibration coefficients are calculated on the basis of the output signals generated by the N-port receiver (1) in response to the feeding of the calibration signals. The calibration signals are unmodulated signals and are only processed by means of a passive RF circuitry in the calibration device (100).The solutions according to the present invention allow a simple calibration of N-port receivers, which can be used as IQ demodulators or converters. Thereby a local oscillator (4) is used as a RF source for the calibration.