主权项 |
1. A method of generating synchronization header (SHR) of orthogonal frequency division multiplexing (OFDM) frame, the method comprising:
generating the SHR including sync sequence of a long training field (LTF), the generating including:
multiplexing sync sequences of a short training field (STF) and the sync sequences of the LTF; andtransforming the multiplexed sync sequences of the STF and the LTF into time domain signals by performing an inverse discrete Fourier transform (IDFT), wherein the sync sequence of the LTF in a frequency domain is [0, −1, 1, −1, 1, −1, −1, −1, 1, −1, 1, −1, −1, −1, −1, −1, 1, −1, 1, −1, 1, 1, 1, −1, −1, 1, −1, −1, 1, −1, 1, 1, −1, 1, −1, −1, 1, −1, 1, −1, −1, 1, −1, 1, −1, 1, 1, −1, −1, 1, 1, 1, 1, −1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, −1, −1, −1, 1, −1, −1, 1, −1, −1, 1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, 1, −1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, 1, 1, 1, 1, −1, 1, −1, 1, −1, 1, −1, −1, 1, −1, 1, −1, 1, −1, −1] in which 128 tones are numbered from DC(0) to 63 and −64 to −1. |