Patent ID: 8774156

Claim:
A method for operating a wireless communication system, comprising: deriving a first index n 1 ; deriving a second index n 2 using the first index n 1 ; determining a first orthogonal covering (OC) index and a first cyclic shift (CS) using the derived index n 1 ; determining a second OC and a second CS using the derived index n 2 ; generating in an apparatus a first slot of a subframe using the OC indexed by the first OC index and the first CS; generating in an apparatus a second slot of the subframe using the OC indexed by the second OC index and the second CS; wherein each slot comprises of a plurality of symbols; wherein at least one symbol in the first slot is generated using a CAZAC-like sequence cyclic shifted by the first CS; wherein at least one symbol in the second slot is generated using a CAZAC-like sequence cyclic shifted by the second CS.