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Do you mean this: "Channels operating with a width of 40 MHz are another feature incorporated into 802.11n; this doubles the channel width from 20 MHz in previous 802.11 PHYs to transmit data, and provides twice the PHY data rate available over a single 20 MHz channel." - this is quote from Wikipedia.
I suppose this was added to MIMO spec to make sure this format is always faster, with or without MIMO. : )
Do you mean this: "Channels operating with a width of 40 MHz are another feature incorporated into 802.11n; this doubles the channel width from 20 MHz in previous 802.11 PHYs to transmit data, and provides twice the PHY data rate available over a single 20 MHz channel." - this is quote from Wikipedia.
I suppose this was added to MIMO spec to make sure this format is always faster, with or without MIMO. : )
Hi again, thanks for the reply. I was referring to the actual 3dB bandwidth of the signal (I think they measure it as -6dB for Wifi but don't quote me). Anyway I did a bit more reading and found out that they increased the number of OFDM subcarriers from 52 to 56 between 11a and 11n (sneaky).
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