Patent ID: 6751262
Filing Date: 2004-06-15
Classification: H04L

Abstract:
Data transmission method, especially in electric networks, comprising the following steps:providing the data to be transmitted as a plurality of data blocks; performing the following substeps for each data block: modulating the data block onto several carrier frequencies within one or several frequency bands by an orthogonal frequency division multiplex method (OFDM) thereby obtaining a frequency domain representation of a signal corresponding to the data block, performing an inverse Fourier transformation on the frequency domain representation to obtain a time domain signal, and multiplying the time domain signal by a window function to obtain a signal block corresponding to the data block; and sequentially transmitting the signal blocks corresponding to the data blocks, each for a predetermined time duration (T), to a receiver; wherein said window function has a Fourier transform, and an absolute value of the Fourier transform has: a zero crossing at the respectively used carrier frequencies, and secondary maxima, which have a damping of at least minus 30 dB in relation to a main maximum of the damping.