Method, apparatus and computer program for open loop transmission diversity

摘要

A symbol multiplied by a first constant amplitude zero autocorrelation code CAZAC reference signal RS is transmitted in a timeslot from a first antenna of a user equipment on a first physical uplink control channel in a manner that multiplexes with other user equipments. A symbol multiplied by a second CAZAC RS is transmitted in the timeslot from a second antenna of the user equipment on a second physical uplink control channel in a manner that multiplexes with other user equipments. The first and second CAZAC RSs are orthogonal to one another by at least one of the cyclic shifts or a cover code applied to at least one of the first and the second CAZAC RSs. The symbols may be the same or different, and may represent an ACK, a NACK, or a scheduling request indicator. These teachings extend to more than two transmit antennas.

主权项

1. 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; transmitting in the timeslot from a second antenna of the user equipment on a second physical uplink control channel using a second reference signal in a manner that multiplexes with other user equipment; and 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,wherein a same symbol multiplied respectively by the first and the second reference signals is transmitted respectively from the first antenna and the second antenna, and wherein at least one physical downlink channel is allocated to the user equipment dynamically on a physical downlink control channel, and
for the case where the at least one physical downlink channel is only one physical downlink channel, the user equipment maps the physical downlink channel to the first uplink control channel k via a first control channel element of the one physical downlink control channel and maps the physical downlink channel to the second physical uplink control channel k+1; and for the case where the at least one physical downlink channel is at least a first and a second physical downlink channel, the user equipment maps the physical downlink channel to the first reference signal via a control channel element of the first physical downlink control channel and maps the physical downlink channel to the second reference signal via a control channel element of the second physical downlink control channel.