a method and device for use , e . g ., in a mobile telephone , for self - clocked controlled pseudo random noise sequence generation comprises a plurality of sequence generator units for outputting a plurality of sequence values on the basis of a plurality of clock values , and step pattern generators for selecting a step pattern , comprising said plurality of clock values , from a plurality of possible step patterns on the basis of a step pattern select signal . thus , a flexible and efficient self - clocked controlled pseudo random noise sequence generation is obtained .