Patent ID: 7903691

Claim:
A method of generating a pilot pattern, comprising: (a) determining a size of a slot which is a section in which the pilot pattern is repeated in a time domain and a frequency domain; (b) determining an arbitrary subcarrier from a plurality of subcarriers in a first OFDMA (orthogonal frequency division multiple access) symbol within the slot in the time domain as a pilot inserting position; (c) calculating frequency-time distances of each of remaining subcarriers of a current OFDMA symbol after the first OFDMA symbol, which excludes the arbitrary subcarrier and subcarriers having an inserted pilot in each of a previous OFDMA symbol within the slot in the time domain, from the inserted pilot in the first OFDMA symbol and each of the previous OFDMA symbol within the slot in the time domain to each of the remaining subcarriers; (d) comparing minimum distances of a frequency-time distance sets of each of the remaining subcarriers; and (e) determining a subcarrier from the remaining subcarriers having a largest frequency-time minimum distance from the compared minimum distances, wherein the determined subcarrier is to be a next pilot inserting position of the current OFMDA symbol.