A method comprising: transmitting in a timeslot from a first antenna of a user equipment on a first physical uplink control channel using a first reference signal in a manner that multiplexes with other user equipment; and transmitting in the same timeslot from a second antenna of the same user equipment on a second physical uplink control channel using a second reference signal in a manner that multiplexes with other user equipment, wherein the first reference signal and the second reference signal comprises a cyclically shifted zero autocorrelation code and the second reference signal is orthogonal to the first reference signal by at least one of the cyclic shifts or a cover code applied to at least one of the first and the second reference signals; the method further comprising, prior to the transmitting from the first or the second antennas, receiving data on the at least one physical downlink channel and mapping the at least one physical downlink channel to at least the first physical uplink control channel, and wherein transmitting from the first and from the second antenna each comprises an acknowledgement for a case where the data is properly received or a negative acknowledgement for a case where the data is not properly received; wherein at least one physical downlink channel is allocated to the user equipment dynamically on a physical downlink control channel, and for a case where there is only one physical downlink channel allocated to the user equipment on the physical downlink control channel, the user equipment maps the physical downlink channel to the first reference signal via a first control channel element of the physical downlink control channel and maps the physical downlink channel to the second reference signal via a second control channel element of the physical downlink control channel; or for a case where there is at least a first and a second physical downlink channel allocated to the user equipment on first and second physical downlink control channels, the user equipment maps the first physical downlink channel to the first reference signal via a control channel element of the first physical downlink control channel and maps the second physical downlink channel to the second reference signal via a control channel element of the second physical downlink control channel. transmitting in a timeslot from a first antenna of a user equipment on a first physical uplink control channel using a first reference signal in a manner that multiplexes with other user equipment; and transmitting in the same timeslot from a second antenna of the same user equipment on a second physical uplink control channel using a second reference signal in a manner that multiplexes with other user equipment, wherein the first reference signal and the second reference signal comprises a cyclically shifted zero autocorrelation code and the second reference signal is orthogonal to the first reference signal by at least one of the cyclic shifts or a cover code applied to at least one of the first and the second reference signals; the method further comprising, prior to the transmitting from the first or the second antennas, receiving data on the at least one physical downlink channel and mapping the at least one physical downlink channel to at least the first physical uplink control channel, and wherein transmitting from the first and from the second antenna each comprises an acknowledgement for a case where the data is properly received or a negative acknowledgement for a case where the data is not properly received; wherein at least one physical downlink channel is allocated to the user equipment dynamically on a physical downlink control channel, and for a case where there is only one physical downlink channel allocated to the user equipment on the physical downlink control channel, the user equipment maps the physical downlink channel to the first reference signal via a first control channel element of the physical downlink control channel and maps the physical downlink channel to the second reference signal via a second control channel element of the physical downlink control channel; or for a case where there is at least a first and a second physical downlink channel allocated to the user equipment on first and second physical downlink control channels, the user equipment maps the first physical downlink channel to the first reference signal via a control channel element of the first physical downlink control channel and maps the second physical downlink channel to the second reference signal via a control channel element of the second physical downlink control channel.