>So, if there are 10 APs and 10 users all within range of each other, then 10 radio signals will sum together at each antenna of each user’s device to produce a

>So, if there are 10 APs and 10 users all within range of each other, then 10 radio signals will sum together at each antenna of each user’s device to produce an independent waveform for each device with only that device’s data. we all know that using 10 AP devices you can generate desired independent waveforms at 10 or less target positions in space. The question is whether it is possible for 11, 12, etc... Interference result is a linear combination of source waverforms. I.e a task sounds like "find M (with M less than N) vectors satisfying these N linear independent conditions"