Device and method for generating a transmission sequence and device and method for determining an information word from a received transmission sequence

摘要

To achieve a distortionless reduction in the out-of-band radiation a plurality of candidate transmit sequences is generated from an information word and one of the candidate transmit sequences, which fulfills a predetermined criterion, is then selected as the transmit sequence. The different candidate transmit sequences are generated by adding respective different labels to the information word and the information word plus added label is then processed by an invertable back-coupled combination algorithm to obtain a combined information word wherein the information units are combined with one another and/or with the added label in such a way that the combined information word is uniquely identified by the label. The combined information word is further processed, e.g. with the aid of a mapper and an inverse Fourier transform in the case of an OFDM modulation method, to obtain a temporal candidate transmit sequence. By repeating the above process the plurality of candidate transmit sequences is obtained, from which the actual transmit sequence is then selected according to a predetermined criterion. In the receiver the combined information word is fed into an algorithm which is inverse to the back-coupled combination algorithm and which is automatically controlled by the label, thus regenerating the information word. In this way the information word is automatically extracted from the received transmit sequence without transmitting explicit side information.