Non-coherent transmission method for uplink control signals using a constant amplitude zero-autocorrelation sequence
View Patent ↗In one embodiment of the instant invention, a non-coherent transmission method for uplink control signals is provided. The transmission methodology uses a constant amplitude zero-autocorrelation (CAZAC) sequence for relatively short control signal lengths. The methodology includes creating a CAZAC sequence, truncating the CAZAC sequence into a plurality of segments; and transmitting each of the segments within a predetermined window of time.
1. A method for transmitting control information, comprising:
transmitting, from a mobile device, each of a plurality of segments of a CAZAC sequence within a corresponding one of a plurality of time-division multiplexed long blocks of a first slot of an ACK/NAK channel, wherein a number of segments in the plurality of segments is greater than or equal to the number of long blocks in the first slot.
2. A method, as set forth in claim 1 , further comprising combining each of the plurality of segments with a cyclic prefix in the first slot.
3. A method, as set forth in claim 1 , comprising truncating the CAZAC sequence to a length that is greater than or equal to the number of long blocks in the first slot multiplied by a sequence length associated with the long blocks.
4. A method, as set forth in claim 1 , wherein transmitting each of the segments further comprises mapping the plurality of segments of the CAZAC sequence to long blocks of a slot structure including the first slot.
5. A method, as set forth in claim 4 , wherein mapping the plurality of segments of the CAZAC sequence to the long blocks of the slot structure further comprises mapping each of the segments of the CAZAC sequence to a corresponding long block in the first slot.
6. A method, as set forth in claim 4 , wherein mapping the plurality of segments of the CAZAC sequence further comprises mapping at least one of the plurality of segments to a reference signal block in the first slot.
7. A method, as set forth in claim 1 , wherein transmitting each of the segments comprises transmitting each of the segments for coherent combination of the long blocks at a receiver.