A method for transmitting data by a transmitting device, includes applying, by the transmitting device, a redundancy version (RV) to a data channel; applying, by the transmitting device, a scrambling sequence to the data channel; and transmitting, by the transmitting device, the data channel, wherein the data channel is transmitted repeatedly in N consecutive subframes, where N is a positive integer greater than 1, wherein the RV for the data channel is changed once every R consecutive subframes in the N consecutive subframes, where R is a predefined positive integer greater than 1 and less than N, and wherein the scrambling sequence for the data channel is applied per subframe to the data channel and stays the same for a block of R consecutive subframes over which the RV for the data channel stays the same.