TechNote: Subcarrier Occupation in 802.11n HT20, HT40 and HT40+/- Channel Modes
Use HT20 or HT40 Mode!
Section 20.3.7 in 802.11n Standard states clearly about the subcarrier occupation in HT20/HT40/HT40+/HT40- channel mode: … In the 20 MHz HT format, the signal is transmitted on subcarriers –28 to –1 and 1 to 28. In the case of the 40 MHz HT format, a 40 MHz channel is used. The channel is divided into 128 subcarriers. The signal is transmitted on subcarriers –58 to –2 and 2 to 58. [Read More]