Coarse frequency synchronisation in multicarrier systems

US6993084B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Ernst Eberlein · Erlangen, DE
• Sabah Badri · Erlangen, DE
• Stefan Lipp · Bad Liebenzell, DE
• Stephan Buchholz · Munich, DE
• Albert Heuberger · Erlangen, DE
• Heinz Gerhaeuser · Erlangen, DE

Key dates

• Filing date: Apr 14, 1998
• Grant date: Jan 31, 2006
• Expiry date: Apr 14, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L27/2675
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A method for generating a signal having a frame structure, each frame of the frame structure comprising at least one useful symbol, a guard interval associated to the at least one useful symbol and a reference symbol, comprises the steps of performing an amplitude modulation of a bit sequence such that the envelope of the amplitude modulated bit sequence defines a reference pattern of the reference symbol and inserting the amplitude modulated bit sequence into said signal as said reference symbol. A method for frame synchronization of a signal having such a frame structure comprises the steps of receiving the signal, down-converting the received signal, performing an amplitude-demodulation of the down-converted signal in order to generate an envelope, correlating the envelope with a predetermined reference pattern in order to detect a signal reference pattern of the reference symbol in the signal, and performing the frame synchronization based on the detection of the signal reference pattern.