= Xilinx ETS 2014 Demo: Massive MIMO Wi-Fi Channel Characterization =

The Rice Argos ([http://argos.rice.edu http://argos.rice.edu]) team partnered with [http://mangocomm.com Mango Communications] to present a Massive MIMO Wi-Fi Channel Characterization demo at the Xilinx Emerging Technology Symposium 2014. This demo combines the [http://argos.rice.edu/pubs/Shepard-MobiCom13-Demo.pdf Rice Argos v2 massive MIMO testbed] with the [wiki:802.11 Mango 802.11 Reference Design] to capture and analyze channel estimates between the array and Wi-Fi clients in real-time.

The demo uses the 96-antenna Argos v2 array. The array is built around 24 quad-antenna WARP nodes, each node consisting of a [wiki:HardwareUsersGuides/WARPv3 WARP v3 kit] and [wiki:HardwareUsersGuides/FMC-RF-2X245 FMC-RF-2X245 module]. Each node in the array runs the 802.11 Reference Design in receive-only mode. The array elements receive every Wi-Fi packet, decode the packet to identify the transmitting client, then report the client identity and the corresponding per-subcarrier channel estimates to a host PC for processing and display.

== Channel Visualizations ==


'''Screen 1''': Real-time plots of channel magnitudes at each array antenna. Each plot shows magnitude of 52 complex channel coefficients (one per active subcarrier).
{{{#!html
<video width="638" height="369" controls>
  <source src="http://warpproject.org/dl/misc/WARP_ArrayDemo_App_Win1.mp4" type="video/mp4" preload="none">
</video>

<video width="638" height="369" controls>
  <source src="http://warpproject.org/dl/misc/WARP_ArrayDemo_App_Win2.mp4" type="video/mp4" preload="none">
</video>

}}}

'''Screen 2''': Real-time plots of wireless capacities given the latest channels between selected clients and the array.
{{{#!html
}}}

== Handouts ==

[attachment:Xilinx_ETS_Demo_Handout.pdf?format=raw Argos Demo Handout]

[attachment:Mango_802.11_RefDes_Handout.pdf?format=raw 802.11 Reference Design]