[hamner]

The white paper is non-technical, but I think this is the gist:

Currently, if you have multiple users and 1 access point (AP), the users split the bandwidth. Multiple APs and multiple users on the same channel results in split bandwidth as well, since the APs operate independently and interfere with each other.

This proposal uses N APs for N users on the same channel, allowing for full bidirectional use of the channel bandwidth by each user. To send data to N users simultaneously, a central server receives the data, and calculates the signal to send to each AP such that the user receives only the clean signal meant for him post interference. This requires precise localization of the user in AP space, presumably done by having the user transmit a certain pattern at the particular frequency, and measuring the result at each of the channels.

For the N users to transmit simultaneously to the N APs, the data center can take each of the incoming signals from the N APs along with the localization of the users in AP space, and apply linear algebra to unmix the signals into a signal from each user.

I imagine this adds some overhead to each channel in order to maintain precise localizations of each user in AP space.