FIELD: radio engineering, communication.
SUBSTANCE: invention discloses a wireless communication device which includes: a scrambling unit (214) which multiplies a modulated response signal by a scrambling code "1" or "-1" in order to invert a plurality for each of the response signals on a cyclic shift axis; an expansion unit (215) which performs primary spectrum expansion of the response signal using a ZAC sequence established by a control unit (209); and an expansion unit (218) which performs secondary spectrum expansion of the response signal once subjected to primary expansion, using a block expanding code sequence established by the control unit (209).
EFFECT: improved characteristic of frequency of negative acknowledgement error signal.
8 cl, 15 dwg
