Demodulation structure and method

US6724246B2 · kind B2 · utility

Assignee

• Sony International (Europe) GmbH · DE

Inventors

• Gerald Oberschmidt · Fellbach, DE
• Veselin Brankovic · Eßlingen, DE
• Dragan Krupezevic · Stuttgart, DE
• Tino Konschak · Stuttgart, DE
• Thomas Dölle · Chemnitz, DE

Key dates

• Filing date: Jan 22, 2001
• Grant date: Apr 20, 2004
• Expiry date: Feb 28, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03D3/009
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

The present invention relates to a demodulation structure and method for downconverting and demodulating a digitally modulated signal So, with a local oscillator means (1; 5; 8) for providing a local oscillator signal Slo a mixer means (2) for mixing said local oscillator signal Slo and said digitally modulated signal S0 in order to obtain a mixed signal, a lowpass filter means (3) for lowpass filtering the mixed signal from the mixer means (2) and an analog-to-digital converting means (4) for converting the filtered signal from the lowpass filter means (3) into a downconverted and demodulated digital signal Sl, whereby the local oscillator signal is set in respect to the modulated digital signal so that the downconverted and demodulated digital signal output from the analog-to-digital converting means comprises to serially arranged information parts. The present demodulation structure provides a very simple structure with improved amplitude and phase imbalances.