Patent ID: 8472308

Claim:
A method for generating a preamble sequence and determining a cyclic shift, comprising: when one root sequence can only generate one preamble sequence and there is not any cyclic shift restriction, setting a cyclic shift step length N CS to be equal to 0 and a corresponding cyclic shift amount C v =0, at this time the root sequence being used as the preamble sequence directly; when one root sequence can generate a plurality of preamble sequences and there is no cyclic shift restriction, the cyclic shift step length N CS being not equal to 0, and at this time, setting a corresponding cyclic shift amount C v =v·N CS , wherein v=0, 1, 2, . . . , └N ZC /N CS ┘−1, N ZC represents a sequence length, └ ┘ represents a floor operation.