Patent ID: 8345535

Claim:
A method of generating a ranging preamble code in a wireless communication system, the method comprising: generating one of a plurality of ranging preamble codes, wherein the plurality of ranging preamble codes are based on a padded Zadoff-Chu (ZC) sequence to which a cyclic shift is applied in a unit of N CS , where said N CS is a function of a cyclic prefix (CP) length in a time domain, wherein the cyclic shift applied to the padded ZC sequence is determined by the following equation: exp ⁡ ( - j ⁢ 2 ⁢ π · k · s p · N CS N FFT ) , k = 0 , 1 , … ⁢ , N RP - 1 , where s p is a cyclic shift index per root index, N FFT is a fast Fourier transform (FFT) size depending on a bandwidth, and N RP is a length of the padded ZC sequence.