A base station comprising: at least one processor; and at least one transceiver configured to: transmit a signal for configuring a user equipment, UE, to perform physical uplink control channel, PUCCH, transmissions on two antenna ports including a first antenna port and a second antenna port; transmit (401, 403) downlink, DL, grants and data streams to the UE on at least one DL component carrier, CC; and characterised in that if more than one DL CC are configured for the UE, receive a value of a modulation symbol on each of two PUCCH resources by using PUCCH format 1b from the UE, wherein the two PUCCH resources include a first PUCCH resource for the first antenna port and a second PUCCH resource for the second antenna port, wherein the value of the modulation symbol is transmitted via each of the two antenna ports of the UE, and wherein a combination of the value and the first PUCCH resource is determined by a first channel selection to indicate a hybrid automatic repeat request-acknowledgement, HARQ-ACK, state for each of the data streams, wherein a combination of the value and the second PUCCH resource is determined by a second channel selection to indicate the HARQ-ACK state for each of the data streams, wherein the first PUCCH resource is identified by the first channel selection among a plurality of first PUCCH resources, and wherein the second PUCCH resource is identified by the second channel selection among a plurality of second PUCCH resources. at least one processor; and at least one transceiver configured to: transmit a signal for configuring a user equipment, UE, to perform physical uplink control channel, PUCCH, transmissions on two antenna ports including a first antenna port and a second antenna port; transmit (401, 403) downlink, DL, grants and data streams to the UE on at least one DL component carrier, CC; and characterised in that if more than one DL CC are configured for the UE, receive a value of a modulation symbol on each of two PUCCH resources by using PUCCH format 1b from the UE, transmit a signal for configuring a user equipment, UE, to perform physical uplink control channel, PUCCH, transmissions on two antenna ports including a first antenna port and a second antenna port; transmit (401, 403) downlink, DL, grants and data streams to the UE on at least one DL component carrier, CC; and characterised in that if more than one DL CC are configured for the UE, receive a value of a modulation symbol on each of two PUCCH resources by using PUCCH format 1b from the UE, wherein the two PUCCH resources include a first PUCCH resource for the first antenna port and a second PUCCH resource for the second antenna port, wherein the value of the modulation symbol is transmitted via each of the two antenna ports of the UE, and wherein a combination of the value and the first PUCCH resource is determined by a first channel selection to indicate a hybrid automatic repeat request-acknowledgement, HARQ-ACK, state for each of the data streams, wherein a combination of the value and the second PUCCH resource is determined by a second channel selection to indicate the HARQ-ACK state for each of the data streams, wherein the first PUCCH resource is identified by the first channel selection among a plurality of first PUCCH resources, and wherein the second PUCCH resource is identified by the second channel selection among a plurality of second PUCCH resources.