为了提高无线终端无线网络速率，可以增加射频的信道工作带宽。. 如果把两个20MHz信道捆绑在一起成为40MHz信道，同时向一个无线终端发送数据，理论上数据的通道加宽了一倍，速率也会增加一倍。. 如果捆绑两个40MHz信道，速率会再次加倍，以此类推。. 按照 Quick question about Roberts testing. Was the 35 cap a limitation of the note 2s wifi or the router wifi? Or both? If you tested 2 devices at the same time would they both max out at 35 each or a combination of 35. And when you connect via usb later this weekend can you also connect another devic With 802.11n, the single “CBW 20/40” bit is left at 0 for 20 MHz transmissions or set to 1 to indicate the remainder of the PPDU will be 40 MHz wide. In 802.11ac the two bit “Bandwidth” field is set to 0 for 20 MHz, 1 for 40 MHz, 2 for 80 Mhz, and 3 for 160 or 80 + 80 MHz OFDM. So I'd just use the "common" upper channels 149-161 at either 40 or 80 width, depending on whether I wanted stability or maximum throughput. Truthfully, I just about always use 40 MHz width on 5 GHz because my WiFi devices don't need much speed. If you are using 20MHz channel width, you can use channels 36, 40, 44, 48, 149, 153, 157, 161, and 165 (non-DFS channels) If you want to use a 40MHz channel width, you will need to use 38, 46, 151, 159. This will ensure that you are not overlapping when you use the larger channel width (again non-DFS). For 80MHz, you can use 42 or 155. 4x4 refers to the number of spatial streams per channel. This article explains:. Wi-Fi Spatial streaming or multiplexing (often shortened to SM or SMX) is a transmission technique used in MIMO wireless communication to transmit independent and separately coded data signals, so called streams, from each of the multiple transmit antennas. rrI4.

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