WIRELESS COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD Russian patent published in 2015 - IPC H04J11/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used for wireless communication systems. An expansion unit (214) expands an ACK/NACK signal input from an evaluation unit (208) by using a ZC sequence. An expansion unit (219) expands the CQI signal by using a cyclic shift ZC sequence. By using a Walsh sequence, an expansion unit (216) further expands the ACK/NACK signal which has been expanded by using the ZC sequence. A control unit (209) controls the expansion unit (214) and expansion unit (219) so that the minimum value of the difference between the CQI signals from a plurality of mobile stations and a cyclic shift value of the ACK/NACK signal is not less than the minimum value of the difference between the cyclic shift values of the ACK/NACK signals from the plurality of mobile stations.

EFFECT: high noise-immunity by providing wireless communication means which mitigate inter-code interference an ACK/NACK signal and a CQI signal and which are code-multiplexed.

46 cl, 17 dwg