9/11/2023 0 Comments Netgear wifi channel scanner![]() ![]() Jumbo frames can help a bit, but come with their own issues. With standard frame sizes, a wired 1 Gbps connection tops out around 940-950 Mbps of TCP throughput. That 5% comes from all the data that’s required to setup the connection and address the packets and frames being exchanged. In all networks wired or wireless, there’s around a 5% overhead in TCP/IP connections. ![]() A more realistic modulation is 256-QAM or 64-QAM, resulting in a maximum link rate in the range of 600-900 Mbps for 80 MHz 2x2, or 1,200-1,800 Mbps for 160 MHz 2x2. The highest data rates are only possible in the best situations, with an AP nearby and limited interference on the channel. The maximum link rate requires 1024-QAM modulation, and a very high signal-to-noise ratio (SNR). Set Modulation/Coding to 256-QAM or Lower For more details, see the Device Class and EIRP Limit section of Wi-Fi 6E Progress and Reality. Range is less though, since 6 GHz attenuates faster, wider channels increase background interference, and 6 GHz indoor low-power AP transmit power is limited. With Wi-Fi 6E, you get access to 6 or 7 more 160 MHz channels, and don’t need to use AFC or DFS if operating indoors. 80 MHz channels are much more realistic option for 5 GHz, limiting maximum link rates to 1,200 Mbps. Using 160 MHz channels in 5 GHz requires the use of DFS, and not all devices support DFS operation. If Using 5 GHz, set Channel Width to 80 MHz Going from 4 streams to 2 streams cuts our maximum link rate from 4,800 Mbps to 2,400 Mbps, if using a 160 MHz channel. ![]() Battery operated Wi-Fi clients like your smartphone or laptop are almost all 2x2:2 devices. While most high-end Wi-Fi 6 access points support 4x4:4 MIMO, the vast majority of client devices top out at 2 spatial streams. MIMO (Multiple Input, Multiple Output) is a direct capacity multiplier, and it multiplies capacity using the same spectrum. This is using 160 MHz channels, and 4 spatial streams. If you use 5 GHz or 6 GHz, you’re down to 4,800 Mbps. Wi-Fi connections only happen on a single band, so you’re only able to access one band at a time. ![]()
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