Patent ID: 8441915

Claim:
A method for sequencing Zadoff-Chu (ZC) sequences of random access channel, comprising the following steps: Step 202 , dividing, by a first group dividing unit, Nq ZC sequences into a plurality of groups according to a cubic metrics of the ZC sequences, wherein 1<=Nq<=Nzc−1, Nzc is the length of the ZC sequence; Step 204 , sequencing, by a second group dividing unit, the ZC sequences, according to a maximum cyclic shift supported by the ZC sequences under a high speed circumstance, within each group to form a plurality of sub-groups; and Step 206 , sequencing, by a sequencing unit, the ZC sequences within each of said plurality of sub-groups according to the cubic metrics of the ZC sequences, wherein, adjacent sub-groups in the same group are sequenced in different orders, while the sub-groups at the boundary of two adjacent groups are sequenced in the same order; wherein, said maximum cyclic shift N CS =min(du,N ZC −2·du), wherein, du is the distance between a correlation peak and a correlation peak alias thereof, and N ZC is the length of said ZC sequence.