George Ou created a chart showing the relative range of each MCS rate based at various channel widths:
@revolutionwifi @vall_wifi @KeithRParsons The negative effects on effective range with wider channels http://t.co/wyg3qtQjJl
— George Ou (@GeorgeOu) August 20, 2014
Following up on his work, I thought it would be useful to provide some context around these coverage ranges by referencing it against a typical noise floor of -93 dBm found in many environments. Using this noise floor and the SNR to MCS rate mapping table, combined with the relative coverage ranges (based on RF signal propagation using the inverse square law) we can visualize what data rates a typical 802.11ac radio will experience at various RSSI and SNR signal levels for each channel width.
Note - these receiver sensitivities are not absolute. Wi-Fi radios vary. But this chart is a good approximation for many radios and provides a generic reference for you to visualize and understand this effect.
802.11ac Receiver Sensitivity (Down to -91 dBm)
802.11ac Receiver Sensitivity (Down to -82 dBm)
Thanks to George Ou for his work on the initial chart!