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So, I've got a wlan router advertised as "AC750" This means 433Mbit/s on the 5Ghz band + 300Mbit/s on the 2.4Mhz (that only adds to 733, but hey).
Now, I have two laptops: one with a 1x1 ac card driven by iwlwifi+iwlmvm. This one gets its 433Mb on the 5Ghz band as it should. The other has a 3x3 wireless-N card (and three cables), driven by iwlwifi + iwldvm. This one is advertised as "450Mbit capable", which means (I think) that it should be able to combine 300Mbit/s on the 5Ghz band and 150 on the 2.4Ghz band.
However, on the latter laptop I can't get more than 150Mb/s on either band. I remember getting close to 300Mbps with a different N-only router, but I can't be sure.
Can anybody clarify how I am supposed to configure iwlwifi to combine throughput on the 3x3 card? I have the mysterious 11n_disable parameter set to "8" (enable agg TX) but that doesn't seem to have any effect.
iwlwifi also has a parameter called "antenna_coupling", which takes a value in "db". I tried values from 10 to 200 there, but there was no observable effect. Can people explain what "antenna coupling" is?
Overall I am a bit confused about wlan speeds and how to properly configure iwlwifi. If you have a good resource/tutorial/guide please share.
Thank you
Last edited by wast3 (2017-02-09 15:03:10)
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I'm not sure you can actually combine two different bands to get more speed, if anything I'd say that is a marketing trick to get higher numbers to stick on the box.
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Bonding, but you need to have two mac addresses for this.
I don't think you can "simply" use both bands otherwise or at least the access point will have to support that "somehow".
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450M is a common rate for single-band triple-antenna 802.11n, no band combining required. In fact, there is no band combining in 802.11 - you need two independent NICs for that and use bonding or bridging. That's how simultaneous dual-band routers work internally. Dual-band NICs can only work on one band at any given time so no such bandwidth aggregation is possible.
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