FIELD: radio engineering, communication.
SUBSTANCE: invention discloses, in particular, a mobile station in which a spreading section (214) first spreads the response signal in a ZAC sequence established by a control unit (209). Further, the spreading section (217) again spreads the response signal in a code spreading sequence on blocks established by the control unit (209). The control unit (209) controls the cyclic shift value of the ZAC sequence used for primary spreading in the spreading section (214), and the code spreading sequence on blocks used for secondary spreading in the spreading section (217), according to the established hopping pattern. The hopping pattern, established by the control unit (209), consists of two hierarchical levels. The hopping pattern for each LB, different for each cell, is determined in the first hierarchical level in order to randomise interference between cells. The hopping pattern, different for each mobile station, is determined in the second hierarchical level in order to randomise interference within cells.
EFFECT: enabling randomisation of both interference between cells and interference within cells.
24 cl, 19 dwg
