Method and analyzing device for analyzing an OFDM signal

Details Method and analyzing device for analyzing an OFDM signal Method and analyzing device for analyzing an OFDM signal

2003-11-12

2009-02-17

Backer, Firmin (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S430000

Reexamination Certificate

active

07492700

ABSTRACT:
The invention concerns a method for analysing an OFDM signal (rIF(t)) transporting a series of data symbols on several orthogonal carrier frequencies, each data symbol having a useful part separated by a guard period from neighboring data symbols, with an analysing device (40) having a signal section (20) with a bandwidth (BWA) smaller than the bandwidth (BWOFDM) of the OFDM signal. The method comprises the steps of low pass filtering of the OFDM signal with a low pass filter (24) and shifting (26) the spectrum of the OFDM signal in order to obtain a frequency shifted filtered OFDM signal (r(i)), whereby the length of the impulse response of the low pass filter (24) is shorter than the length of the guard periods of the data symbols.

REFERENCES:
patent: 6359938 (2002-03-01), Keevill et al.
patent: 6510133 (2003-01-01), Uesugi
patent: 6747946 (2004-06-01), Kaneko et al.
patent: 6772181 (2004-08-01), Fu et al.
patent: 7206350 (2007-04-01), Korobkov et al.

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