Schlammimpulstelementrie data modulation technique

There is provided a technique for transmitting data in a borehole (16). In one embodiment, a method includes receiving digital data (70) and encoding the digital data (70) into symbols, each of which is indicative of one or more data bits of the digital data (70). In this embodiment, the method further includes modulating the phase of a sound wave in the borehole (16) to represent the plurality of symbols, modulating the phase of a sound wave changing the phase of the acoustic wave such that the acoustic wave smooth phase transitions between successive phases, are indicative of the plurality of symbols, which comprises. In addition, other methods, systems and devices are provided.