Wireless Access

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New Contributor
Posts: 3
Registered: ‎03-24-2017

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

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?

Guru Elite
Posts: 21,270
Registered: ‎03-29-2007

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

Channel bonding combines the throughput of two channels.


Colin Joseph
Aruba Customer Engineering

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New Contributor
Posts: 3
Registered: ‎03-24-2017

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

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.

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