I have a wired connection of about 36Mb/s, but my wireless speed is max at about 18-19Mb/s. I have a WRT54G-TM (T-Mobile, 802.11G) router with DD-WRT firmware - I've upgraded it to latest build. Done some settings changes:

• changed channel - 13
• wireless network mode - G-only
• ACK Timing - 0
• Fragmentation Threshold and RTS Threshold - 2304
• Basic Rate - All

Signal/Noise ratio: -46/-94, signal quality ~50-60%. Is this normal with G networks?

Edit: The AP is located about 2 meters from laptop, no walls or metal objects, but its next to a TV. I've done a channel scan (had problems locating it, go to "Status -> Wireless -> Site survey" - lame naming) and everybody else is on channels 1 and 6. Switched to channel 11 but it didn't help. As for trasmit power I got best results with default 71mw. The antenna might be a factor, I'm using the default 2 antennas.