The options within the HT (High Throughput) tab in Wireless of MikroTik's RouterOS are designed to improve the performance and efficiency of wireless networks, especially those operating under the 802.11n and later standard (such as 802.11ac).

These options are particularly useful in environments where high data transmission capacity and efficient use of the radio frequency spectrum are required. Here I detail some of the most relevant options and what they help us with:

HT TX/RX Chains

These options allow you to configure the transmission (TX) and reception (RX) chains that will be used. Allowing multiple chains can significantly increase performance by allowing MIMO (Multiple Input, Multiple Output), which means multiple signals can be sent and received simultaneously.

HT MCS (Modulation and Coding Scheme)

This configuration allows you to select the modulation and coding scheme used for data transmission. The higher the MCS, the higher the potential data transfer rate, but also the more susceptible to interference and poor signal conditions.

HT Guard Interval

The guard interval refers to the space between transmitted symbols to avoid interference between them. A shorter guard interval can increase efficiency and data transfer rate, but is only recommended in environments with low interference and good signal conditions.

HT 20/40 MHz Ce

This option allows you to configure the channel to operate in bandwidths of 20 MHz or 40 MHz (Ce refers to Coexistence). A 40 MHz bandwidth can double the data rate compared to 20 MHz, but may be more susceptible to interference and may interfere with other devices on congested bands.

HT AMPDU Priorities

This setting allows you to enable or disable MAC Protocol Data Unit (AMPDU) aggregation priorities which can increase transmission efficiency by allowing multiple data packets to be sent as a single block.

These advanced settings allow network administrators to optimize their wireless networks for different scenarios and requirements, from maximizing data speed and capacity to improving stability and range in environments with problematic signals. It is important to experiment with these settings and perform performance tests to find the right balance for each specific situation.