Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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Please explain how channel bonding (i.e. 40MHz channel width) allows more throughput

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  • 1.  Please explain how channel bonding (i.e. 40MHz channel width) allows more throughput

    Posted May 27, 2017 09:31 PM

    I'm early in the WLAN learning curve.  I can understand how more complex modulation schemes allow more data throughput.  However I don't understand how going to wider channels allows more data throughput without changing the modulation.

     

    Does more channel width allow for faster / more aggressive transitions between the modulation states?



  • 2.  RE: Please explain how channel bonding (i.e. 40MHz channel width) allows more throughput

    EMPLOYEE
    Posted May 27, 2017 09:37 PM
    Channel bonding combines the throughput of two channels.


  • 3.  RE: Please explain how channel bonding (i.e. 40MHz channel width) allows more throughput

    Posted May 27, 2017 11:03 PM

    More reading lead to an explanation.

    https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

    The thing I was missing was that the QAM modulation is applied to each subcarrier.  So doubling the channel width doubles the number of subcarriers, which doubles the data rate.