Newbie level 3
In 802.11n, we can get the channel state information(csi) from the 802.11n frames. However, the csi just contains the phase and amplitude of the subcarriers in ofdm. Now, I want to get the corresponding frequency of each subcarriers. How can I obtain them? Through some searching, I know I have to get the frequency spacing and the frequency range(or starting frequency) to calculate it. But how can I get these two values? Is the 802.11n frequency range different in a different country or regions?