I'm testing my new home 802.11n network.
router - slax 7, kernel 3.8.2, AR9382 mini pci-e (sparklan WPEA-121N)
wlan0 IEEE 802.11abgn ESSID:"xyz" Mode:Ad-Hoc Frequency:2.412 GHz Cell: 96:77:38:F7:80:C8 Tx-Power=16 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on
desktop - slackware 14.1, kernel 3.10.17, AR9287 pci-e x1 (tp-link TL-WN881ND)
wlan0 IEEE 802.11bgn ESSID:"xyz" Mode:Ad-Hoc Frequency:2.412 GHz Cell: 96:77:38:F7:80:C8 Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off
laptop - windows 7, intel centrino advanced-n 6205
All computers are in the same place, standing next to each other, InSSIDer shows no interference with other networks, very good signal quality. All wireless adapters can theoretically work in 802.11n 300Mbps speed.
I set up ad-hoc network with
iw wlan0 ibss join xyz 2412 HT40+
I'm testing speed with iperf. I can't get more than 3-4Mbps between any of my devices. When using 802.11g (NOHT option) I get 17-19Mbps between my desktop and server. Laptop still at 4Mbps.
Whats going on? Why I can't reach even 50% of 802.11g?
iwlist wlan0 scan I never see available bitrates > 54Mb/s for my network.