Patent ID: 7532678

Claim:
In a method of transmitting data by multicarrier modulation, wherein the data at a transmitter side are assembled into blocks and modulated block by block with an Inverse Discrete Fourier Transformation and wherein several carriers are reserved, not being occupied with data, and the carriers are used to define a group of temporal functions that is generated which result in Dirac-like temporal functions after a filtering, the improvements comprising: generating the temporal functions such that the Dirac-like temporal functions obtained after the filtering have maxima in an oversampled temporal resolution at neighboring locations, saving both oversampled Dirac-like temporal functions ({tilde over (X)} (0) ) after the filtering and corresponding non-oversampled filter input functions (x (0) ) in memory in pairs, and selecting from the pairs of saved oversampled Dirac-like temporal functions and non-oversampled filter input functions a pair that has a maximum of an oversampled temporal function at a predetermined location (m) of an oversampling grid, wherein during each step of an iterative computation, a displacement law is applied to shift each time a pair of an oversampled temporal function and a corresponding filter input function to a location of a peak value produced by a data occupation of the remaining carriers and then the pair of the oversampled temporal function and the corresponding filter input function is weighted with a factor (α) and subtracted from the pair of the oversampled temporal function and the corresponding filter input function of a moment, and modifications resulting from iterative computations already performed are also considered as temporal or input functions, and wherein the iterative modifications are applied in parallel to the oversampled temporal functions ({tilde over (X)} (0) ) after the filtering and to the corresponding non-oversampled filter input functions (x (0) ).