RADIO COMMUNICATION DEVICE AND RESPONSE SIGNAL EXPANSION METHOD Russian patent published in 2013 - IPC H04J11/00 

FIELD: radio engineering, communication.

SUBSTANCE: radio communication device suppresses inter-code interference between an ACK/NACK signal and a CQI signal which are code-multiplexed. In this device, an expansion unit (214) expands the ACK/NACK signal input from an evaluation unit by using a ZC sequence. An expansion unit expands the CQI signal by using a cyclic shift ZC sequence. By using Walsh sequence, an expansion unit further expands the ACK/NACK signal which has been expanded by using the ZC sequence. A control unit controls the expansion unit 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 smaller 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.

26 cl, 17 dwg