Patent ID: 8532160

Claim:
A mobile apparatus for spreading an ACK, NACK (acknowledgment, negative-acknowledgment) signal or a CQI (channel quality indicator) signal by using a sequence defined with a cyclic shift amount having a cyclic shift index, which is one of a total of 12 cyclically continuous cyclic shift indexes, and transmitting the ACK, NACK signal or the CQI signal by using a physical resource that supports a mix of the ACK, NACK signal and the CQI signal, comprising: (a) for transmitting the ACK, NACK signal, a spreading section that spreads the ACK, NACK signal by using an orthogonal sequence having a sequence index corresponding to a PUCCH (physical uplink control channel) number allocated to the mobile apparatus and by using the sequence defined with the cyclic shift amount having the cyclic shift index corresponding to the PUCCH number; a transmitting section that transmits the spread ACK, NACK signal; and a changing section which changes the cyclic shift amount having the cyclic shift index corresponding to the PUCCH number between symbols, so that a difference in the cyclic shift amount between the symbols is common in a cell, and which changes the cyclic shift amount having the cyclic shift index corresponding to the PUCCH number between slots, so that a difference in the cyclic shift amount between the slots differs amongst PUCCH numbers, wherein the changing section changes the cyclic shift amount having the cyclic shift index corresponding to the PUCCH number between the slots so that the cyclic shift index corresponding to the PUCCH number in each of the slots is one of N number of cyclically continuous cyclic shift indexes where N is an integer, and wherein cyclic shift amounts of the N number of cyclically continuous cyclic shift indexes differ amongst symbols; and (b) for transmitting the CQI signal, the spreading section spreads the CQI signal by using the sequence defined with the cyclic shift amount having the cyclic shift index, which is one of (12−N) number of cyclically continuous cyclic shift indexes that result from excluding the N number of cyclically continuous cyclic shift indexes from the total of 12 cyclically continuous cyclic shift indexes, and the transmitting section transmits the spread CQI signal.