i played with the linksys WRT54G for a while and somehow got stuck in
DD-WRT concept of diversity antenna. and also i am skeptical about the
MIMO title that the Ralink chipset is advertised, after all, the
AWLL5025 is still within 802.11G specs, while MIMO seems to belong to
draft-N or whatever...

but yeah in true MIMO design, diversity mean multiple RX antennas, (and
mulltiple TX antennas too)
i often see draft-N wireless adpaters with three antennas, just like
the 802.11G AWLH5025 PCI adapter, but i was too lazy to learn about the
antenna configurations. let me give it a try. these are possible
configuration in a three-antenna setup

a) three TX/RX combos
b) one dedicated RX and two TX/RX combos
c) one dedicated TX and two TX/RX combos
d) two dedicated RX and one TX/RX combos
e) two dedicated TX and one TX/RX combos

i am still clueless about how many radios needed for one "draft-N"
adaptor. but i do hope that there's no final N. 802.11 B/G is good
enough for me, and for all, that's all we need for wireless
internet.... as for networking, i'd prefer and recommend the old
fashion way...

anyways, in the case of the AWLL5025 USB, the external antenna must be
the combo TX/RX. Thank you for pointing that out. it makes alot of
sense... and i think i am gonna hack the antenna after this... yes i am
serious!


cheers


miso@sushi.com wrote:
>
>
> <snip>
> I am running X64, so I had to get the driver off the net. I haven't
> tried the Airlink with netstumber on my notebook (win2kpro).
>
> My understanding of diversity receive is there are multiple receive
> antennas and one combination transmit/receive antenna. On my SMC card,
> the combination TX/RX port is the one near the LED.