The present invention relates to a method for modulation, the method comprising: receiving a data stream; forming a modulated electrical signal from the data stream by using a plurality of data signals, each of the plurality of data signals representing at least one data bit of the data stream, wherein one of the plurality of data signals is a zero signal and wherein the remainder of the plurality of data signals comprises periodic, positive non-zero subcarrier signals and/or non-periodic signals with a positive DC-level; and providing the modulated electrical signal representing the data stream.The present invention also relates to a device performing the modulation method and to a system incorporating such a device.