A method for, at a user equipment, UE, configured with a primary carrier and at least one secondary carrier, transmitting acknowledgement/negative acknowledgement, ACK/NACK, in a wireless communication system, the method comprising: receiving information on a plurality of physical uplink control channel, PUCCH, resources through higher layer signaling; receiving a transmit power control, TPC, field through a physical downlink control channel, PDCCH, on a secondary carrier; receiving data indicated by the PDCCH; characterized by: modulating ACK/NACK information including ACK/NACK for the data_to generate N 1 modulation symbols, N 1 being twice a number of subcarriers in one resource block, RB; block-wise multiplying the first N 1 /2 modulation symbols of the N 1 modulation symbols by each element (w0, w1, w2, w3) of a first orthogonal code to generate a first plurality of sequences; block-wise multiplying the second N 1 /2 modulation symbols of the N 1 modulation symbols by each element (w0, w1, w2, w3) of a second orthogonal code to generate a second plurality of sequences; and transmitting the first and second plurality of sequences using a PUCCH resource in a subframe, wherein each sequence of the first plurality of sequences is mapped to a corresponding single carrier frequency division multiple access, SC-FDMA, symbol in a first slot of the subframe, and each sequence of the second plurality of sequences is mapped to a corresponding SC-FDMA symbol in a second slot of the subframe, wherein each sequence of the first and second plurality of sequences is a respective discrete Fourier transformed sequence, wherein the PUCCH resource is indicated by a value of the TPC field, from among the plurality of PUCCH resources, and the value of the TPC field is set to the same value in a plurality of PDCCHs received through a plurality of secondary carriers. receiving information on a plurality of physical uplink control channel, PUCCH, resources through higher layer signaling; receiving a transmit power control, TPC, field through a physical downlink control channel, PDCCH, on a secondary carrier; receiving data indicated by the PDCCH; characterized by: modulating ACK/NACK information including ACK/NACK for the data_to generate N 1 modulation symbols, N 1 being twice a number of subcarriers in one resource block, RB; block-wise multiplying the first N 1 /2 modulation symbols of the N 1 modulation symbols by each element (w0, w1, w2, w3) of a first orthogonal code to generate a first plurality of sequences; block-wise multiplying the second N 1 /2 modulation symbols of the N 1 modulation symbols by each element (w0, w1, w2, w3) of a second orthogonal code to generate a second plurality of sequences; and transmitting the first and second plurality of sequences using a PUCCH resource in a subframe, wherein each sequence of the first plurality of sequences is mapped to a corresponding single carrier frequency division multiple access, SC-FDMA, symbol in a first slot of the subframe, and each sequence of the second plurality of sequences is mapped to a corresponding SC-FDMA symbol in a second slot of the subframe, wherein each sequence of the first and second plurality of sequences is a respective discrete Fourier transformed sequence, modulating ACK/NACK information including ACK/NACK for the data_to generate N 1 modulation symbols, N 1 being twice a number of subcarriers in one resource block, RB; block-wise multiplying the first N 1 /2 modulation symbols of the N 1 modulation symbols by each element (w0, w1, w2, w3) of a first orthogonal code to generate a first plurality of sequences; block-wise multiplying the second N 1 /2 modulation symbols of the N 1 modulation symbols by each element (w0, w1, w2, w3) of a second orthogonal code to generate a second plurality of sequences; and transmitting the first and second plurality of sequences using a PUCCH resource in a subframe, wherein each sequence of the first plurality of sequences is mapped to a corresponding single carrier frequency division multiple access, SC-FDMA, symbol in a first slot of the subframe, and each sequence of the second plurality of sequences is mapped to a corresponding SC-FDMA symbol in a second slot of the subframe, wherein each sequence of the first and second plurality of sequences is a respective discrete Fourier transformed sequence, wherein the PUCCH resource is indicated by a value of the TPC field, from among the plurality of PUCCH resources, and the value of the TPC field is set to the same value in a plurality of PDCCHs received through a plurality of secondary carriers.