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802.11n20 802.11n40 有什么区别，CC3200支持吗？

user4066886
Expert 1742 points
Other Parts Discussed in Thread: CC3100, CC3200

  • 0
    TI__Guru**** 188340 points
    40 MHz Channels is an optional feature under WiFi 802.11n. WiFi Devices supporting this feature use 2 adjacent WiFi channels to achieve higher throughputs (typically > 50 Mbps). It requires 2 adjacent WiFi channels to be free and available which is typically not the case in crowded 2.4 GHz Wi-Fi environments.

    This feature implementation is done in the WiFi Radio. CC3200 and CC3100 WiFi does not support 40 MHz channels.
  • 0
    Guru 42467 points

    主要指的是802.1ln20/40MHz

    两者的发射功率也不同，参见上表。在手册里只提到了支持BGN。

    百科里也有介绍，802.1ln支持在多种标准带宽（20MHz)上的速率，包括（单位Mb/s)：7.2，14.4,21.7,28.9，43.3,57.8,65,72.2（单天线）。使用4×MIMO时速率最高为300Mb/s。802.11n也支持双倍带宽（40MHz)，当使用40MHz带宽和4×MlMO时，速率最高可达600Mb/s。

    也就是说，该芯片CC3200至少是支持20MHZ的标准带宽的。双倍带宽40MHz，不支持。