20120087286 | METHOD FOR TRANSMITTING AN ACK/NACK SYMBOL AND APPARATUS - A method for transmitting an ACK/NACK symbol includes transmitting a same ACK/NACK symbol in both a first reference symbol and a second reference symbol in a slot. An apparatus to transmit an ACK/NACK symbol includes an ACK/NACK symbol generator, and a transmitter to transmit a modulated first reference symbol modulated by a first ACK/NACK symbol in a first reference symbol long block of a first slot, and to transmit a modulated second reference symbol modulated by the first ACK/NACK symbol in a second reference symbol long block of the first slot. Antenna diversity may be applied in successive slots or between the first and second reference symbols in a slot. A switching pattern to the modulation of the first and/or second reference symbol may be applied. | 04-12-2012 |