US 6,993,084 B1
Coarse frequency synchronisation in multicarrier systemsGeneral
US 6,993,084 B1
Coarse frequency synchronisation in multicarrier systems
Tech Center:
2600 Communications
Examiner:
Emmanuel Bayard
Art Unit:
2638 Digital and Optical Communications
Inventors:
Ernst Eberlein; Sabah Badri; Stefan Lipp; Stephan Buchholz; Albert Heuberger; Heinz Gerhaeuser
Assignee:
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Priority:
04/14/98
Filed:
04/14/98
Granted:
01/31/06
Expiration:
04/14/18
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.