What is and what MCS means 802.11n

In the wireless settings on some existing devices we can see in the section Data Rate, Baud Rate Transfer or several additional options appear to us as MCS0, MCS1, etc. What does this mean? Today we will try to explain as best as possible.

MCS stands for Modulation and Coding Scheme, which could be translated as "Modulation and Coding System". The 802.11n standard defines a total of 77 MCS. Each MCS is a combination of a given modulation (for example, BPSK, QPSK, 64-QAM), the coding rate or coding rate (such as 1/2, 3/4), the guard interval or guard interval ( 800ns or 400ns) and the number of spatial streams or Spatial Streams. All 802.11n access points must withstand (at least) from MCS0 to MCS15 and 802.11n clients from MCS0 to MCS7.

Then you have a table with the combination for each MCS index from 0 to 31.

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