[ath9k-devel] Througput 802.11g-like - configuration issue?

[Fabian Hugelshofer <hugelshofer2006@gmx.ch>]

Hi all,

I am using ath9k with OpenWRT. I have two router boards with identical
wireless cards. The wireless card get recognised as:
phy0: Atheros AR9160 MAC/BB Rev:1 AR5133 RF Rev:b0

Both cards operate in ad-hoc mode on 2.4 or 5Ghz. The maximum TCP
goodput measured with Netperf was 15.5Mbps. With two 802.11g cards and
the Madwifi drivers I get almost 27Mbps. I wonder why the throughput is
not higher.

Do I have to enable MIMO or is it enabled by default? Detaching two of
the three antennas has no impact unless I detach the first antenna (in
which case no communication is possible at all).

On both nodes I set HT40 (iw dev wlan0 set channel 40 HT40-). This did
not increase the performance. I also tried hostapd
(ht_capab=[HT40-][SHORT-GI-40][RX-STBC123][TXSTBC]) without any
improvements.

Is this a configuration issue, related to the hardware I use or are the
ath9k drivers not as far developped yet? Has anyone achieved higher
trhoughput with ath9k?

I can provide further information if required. Here the software
versions I am using:
linux 2.6.28.9
iw 0.9.11
compat-wireless 2009-03-31

Cheers,

Fabian