Patent ID: 9673954
Date: 2017-06-06
CPC Classifications: H04B,H04J,H04L,H04W

Claim:
1. A mobile station for transmitting an acknowledgement or negative acknowledgement (ACK/NACK) signal comprising: a processor configured to multiply an ACK/NACK signal either by a first value for rotating a constellation of the ACK/NACK signal by 0 degrees or by a second value for rotating the constellation of the ACK/NACK signal by N degrees, which is different from 0 degrees; a transmitter configured to transmit the ACK/NACK signal multiplied by the first value or the second value; wherein, in a case where a Physical Uplink Control Channel (PUCCH) index used by the mobile station is in a first PUCCH index group, the processor is configured to multiply the ACK/NACK signal by the same value for both transmitting in a first slot and transmitting in a second slot, and in a case where the PUCCH index used by the mobile station is in a second PUCCH index group, the processor is configured to multiply the ACK/NACK signal by different values for transmitting in the first slot and transmitting in the second slot, respectively.