Hello, I'm looking for either a better forum in which to ask these questions, or answers if this is a good place. I've searched the internet and can't seem to get the search terms correct. I have a quad antenna router running LEDE in client mode and am trying to understand more how the antennas work in client mode and how MIMO and multiple antennas work in general under LEDE, especially in client mode.
How does LEDE leverage the multiple antennas? If only one antenna is used for client mode wireless WAN connection, at what point in the boot process is antenna selected and how is it selected? I'm assuming it would be at time of association as how else would the best antenna be selected? How would one trigger a re-selection from the command line without rebooting? Currently I trying ifconfig'ing the wlan interface down, then back up, but given I don't know how to tell which single antenna, if any, has been selected for the client mode WAN uplink, I'm not sure this is doing what I think it is doing.
Or maybe I'm missing the entire picture and a single antenna isn't selected as I'm used to and somehow MIMO is used in client mode to make use of all the antennas to zero in on the gateway AP; in which case can the antennas be relocated relative to each other without messing up the MIMO function?
More generally, and less dealing with my specific issues, I'm curious how LEDE interacts with MIMO, if at all. Is there any info in proc or sys that gives a view into the MIMO process? How does the radio hardware know which signal is of interest and how does the firmware fit into this. I assume that associated connections are used somehow, but is this all under the hood with no need for LEDE to deal with the details, or does LEDE have to fill in some blanks on the fly for the hardware on a connection by connection basis?
I know this a wagon load of questions here but I'm trying to wrap my brain around the general layout as at this point and I don't know enough to be more specific
Any specific answers with regards to LEDE, client mode, multiple antennas are very welcome and of course any pointers to other forums and threads that are better locations for this question are welcome and appreciated
 I am working with a Linksys WRT1900ACS for those interested