WiFi 802.11 a b G N AC standard Summary

A comparative summary of 802.11 abgn AC

802.11B Standard released at 1999 2.4GHz Maximum rate 11mbps distance 100m~300m business data image and data physical layer CCK and DSSS

802.11G Standard released at 2003 2.4GHZ Maximum rate 54mbps distance 150m service data voice image data physical layer CCK OFDM PBCC

802.11n Standard released at 2.4g5ghz highest rate 300mbps distance almost business data voice image data physical layer MIMO OFDM

802.11AC Standard released at 5GHz Max rate 1Gbps

802.11AC core technology is mainly based on 802.11a, Bo Tong is the world's first use of 802.11AC technology chip manufacturers, currently using its 5G chip famous brand has Samsung mobile phone Galaxy S4, HTC one and so on. In 2014, 802.11AC accounted for 18% of the world's 176 million access point (AP) shipments.

In terms of core technology, 802.11AC is built on the 802.11n standard, including the 5GHz band that will use 802.11n.

In the channel settings, 802.11AC will follow the 802.11n MIMO (multi-input and multi-out) technology, for its transmission rate of Gbps level lay the foundation, the first phase of the target to achieve a transmission rate of 1Gbps, the purpose is to achieve the transmission rate of cable cable

802.11ac the operating bandwidth of each channel will be increased from 802.11n 40MHz to 80MHz or even 160MHz, plus about 10% of the actual frequency modulation efficiency, the final theoretical transfer speed from 802.11n to 600Mbps the highest 1Gbps. Of course, the actual transmission rate may be between 300mbps~400mbps, close to the current 802.11n actual transmission rate of 3 times times (the actual transmission rate of 802.11n wireless router is between 75mbps~150mbps), is fully sufficient to transmit the multi-channel compressed video stream simultaneously on a single channels.