Patent ID: 8879603

Claim:
An integrated circuit for controlling a process comprising: transmitting data to a mobile station and transmitting, to the mobile station, control information related to the data on a control channel element (CCE); and receiving, from the mobile station, an ACK or NACK symbol that is multiplied with an orthogonal sequence, which is one of plural orthogonal sequences, and with a sequence defined by a cyclic shift value, which is one of plural cyclic shift values and which is associated with the orthogonal sequence, the ACK or NACK symbol being scrambled by 1 or e j(π/2) , wherein: the orthogonal sequence, with which the ACK or NACK symbol is multiplied, and the cyclic shift value that defines the sequence, with which the ACK or NACK symbol is multiplied, are associated with a CCE number of said CCE; and the ACK or NACK symbol is scrambled by 1 when a cyclic shift value that defines the sequence, with which the ACK or NACK symbol is multiplied, is one of two cyclic shift values that are associated with one of the plural orthogonal sequences and that are next to each other at a set interval, and is scrambled by e j(π/2) when a cyclic shift value that defines the sequence, with which the ACK or NACK symbol is multiplied, is the other of the two cyclic shift values.