There is provided a method comprising: obtaining, by an apparatus, a first data block, a second data block and a third data block; generating a first signal, wherein a first part of the first signal is generated based on a data of the first data block, and wherein a second part of the first signal is generated based on a data of the second data block, the second part being subsequent in time domain compared with the first part; generating a second signal, wherein a first part of the second signal is generated based on a data of the third data block, and wherein a second part of the second signal is generated based on the data of the second data block, the second part being subsequent in time domain compared with the first part; and transmitting the first and second signals.