Carrier control loop for a receiver of digitally transmitted signals

US6215830A · kind A · utility

Assignee

• Micronas GmbH · DE

Inventors

• Miodrag Temerinac · Gundelfingen, DE
• Franz-Otto Witte · Landsberg am Lech, DE

Key dates

• Filing date: Jul 13, 1998
• Grant date: Apr 10, 2001
• Expiry date: Jul 13, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2027/0067
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A carrier control loop (1) for a receiver of digitally transmitted signals is disclosed comprising, in the direction of signal flow, a quadrature demodulator (3), a symbol recognition device (4), a detector (9) for forming a phase deviation value (.phi.d) and/or a frequency deviation value (fd), a feedback device (10), and a variable-frequency oscillator (11) connected to the quadrature demodulator (3). An evaluating device (12) determines from signals (I, Q) of the carrier control loop (1) a reliability value (z) for the measured phase deviation value (.phi.d) and/or frequency deviation value (fd), and controls the carrier control loop (1) in accordance with the determined reliability value.