RADIO COMMUNICATION DEVICE AND RESPONSE SIGNAL DIFFUSION METHOD Russian patent published in 2018 - IPC H04J11/00 

FIELD: wireless communication equipment.

SUBSTANCE: invention relates to communication engineering and can be used in wireless communication systems. In order to achieve the technical result, the radio communication device suppresses inter-code interference between ACK/NACK signal and a CQI signal which are code-multiplexed. In this device, diffusion unit (214) diffuses the ACK/NACK signal inputted from judgment unit (208) by using a ZC sequence. Diffusion unit (219) diffuses the CQI signal by using a cyclic shift ZC sequence. By using a Walsh sequence, diffusion unit (216) further diffuses the ACK/NACK signal which has been diffused by using the ZC sequence. Control unit (209) controls diffusion unit (214) and diffusion unit (219) so that the minimum value of the difference between the CQI signals from a plurality of mobile stations and a cyclic shift amount of the ACK/NACK signal is not smaller than the minimum value of the difference between the cyclic shift amounts of the ACK/NACK signals from the plurality of mobile stations.

EFFECT: higher noise-immunity of communication.

6 cl, 17 dwg