What is the MCS Index? How to Read and Measure It. MCS Index Table, Modulation and Coding Scheme Index 11n, 11ac, and 11ax. MCS stands for modulation and coding scheme. The modulation refers to the way data is formatted prior to transmission. The coding scheme refers to how the data is encoded while being transmitted.

MCS summarizes and categorizes Wi-Fi parameters such as modulation, coding scheme, guard interval, and channel width. MCS Table for 802.11n and 802.11ac MCS Parameters

NR MCS and Code Rate are determined by a predefined table as in 38.214 - Table 5.1.3.1-1 and 38.214 - Table 5.1.3.1-2, which is pretty straight forward. However, determining TBS (Transport block size) in NR is more complicated than the one in LTE.

This page mentions 5G NR MCS Table and 5G NR TBS Table as defined in 3GPP TS 38.214. MCS stands for Modulation and Coding Scheme and TBS stands for Transport Block Size. 5G NR (New radio) is latest cellular wireless technology which follows 3GPP specifications similar to LTE.

This blog presents the results of the new MCS table updated to include all the new 802.11ax data rates. It also presents how these data rates are calculated.

Following table mentions 802.11ax MCS rates for short guard interval (i.e. 800 ns). Here SS stands for Number of Spatial Streams. 8 xSS refers to eight number of spatial streams. 802.11ax Data rates mentioned in the table are in units of Mbps.

WiFi 7 MCS table is defined in IEEE 802.11be standard. It illustrates how different combinations of modulation, coding rate, spatial streams, channel bandwidth, and guard interval result in different data rates.

Following tables show mapping between MCS and Qm for PDSCH (Downlink). As you see, each MCS value is directly mapped to as specific Qm. Table 7.1.7.1-1 is for the UE which does not support 256 QAM and Table 7.1.7.1-1A is for the UE which support 256 QAM.

In this post, we will update the sets of Wi-Fi data rates to include the new data rates provided by the new 802.11be (Wi-Fi 7) standard. The following table includes all the MCSs data rates (up to 8 spatial streams) defined by the 802.11n (HT), 802.11ac (VHT), 802.11ax (HE) and 802.11be (EHT) amendments:

2023年12月14日 · 5G NR uses tables to define the MCS index mappings, allowing for flexibility in adapting to different scenarios and deployment scenarios. The selected MCS directly impacts the achievable throughput. Higher MCS values result in higher data rates, but they may be more susceptible to errors.