= Mango Communications Team Presents Demo at ACM MobiCom 2014 =

Mango Communications presented a demonstration titled [http://dl.acm.org/citation.cfm?id=2641746 "Real-Time MU-MIMO Channel Analysis with a Custom 802.11 Implementation"] at MobiCom 2014. The demonstration combined [wiki:HardwareUsersGuides/WARPv3 WARP v3] with [wiki:802.11 the 802.11 Reference Design] to let conference attendees use their own Wi-Fi clients to interact with the hardware and witness real-time changes in MU-MIMO channels. This demonstration is one of the many research applications enabled by the Mango Communications 802.11 Reference Design, an open-source, real-time FPGA implementation of the 802.11a/g MAC and PHY.

=== Demonstration Details ===

The demonstration consists of 5 WARP v3 nodes running the Mango 802.11 Reference Design:
  * 1 is a standard AP serving Internet access to Wi-Fi clients. This AP implementation is identical to the [wiki:802.11/MAC/Upper/AP Access Point implementation] part of the 802.11 Reference Design release.
  * 4 are quad-antenna monitors capturing per-subcarrier channel estimates for real-time analysis.

Conference attendees join the open AP with their personal Wi-Fi clients (e.g. smartphones/tablets) and use the AP to access the Internet. Once the association process with the AP is complete, the 16-antenna array of WARP boards begins to overhear transmissions from the conference attendees' Wi-Fi clients. The [wiki:802.11/PHY#ReceiverArchitecture OFDM Receiver] in each array element's PHY automatically estimates the channel between the conference attendees' devices and itself. These channels are learned via the two LTS symbols in the preamble of every transmission from the Wi-Fi clients. 

[[Image(screenshot.png, 640px)]]





* Custom Python framework coordinates runtime configuration of each node
* Custom PC application displays real-time channel estimates and SU/MU-MIMO achievable rates
* Full 802.11 MAC/PHY source available at [http://warpproject.org/802.11 http://warpproject.org/802.11]

All code used in the demonstration corresponds to [source:ReferenceDesigns?rev=3857 SVN revision 3857]

Conference handout: [raw-attachment:Mango_MobiCom_2014_Handout.pdf PDF (660 kB)]

=== Photos from the Demo Floor ===

||||  [[Image(mobicom_4.jpg, 640px)]]  ||
||  [[Image(mobicom_1.jpg, 320px)]]  ||  [[Image(mobicom_2.jpg, 320px)]]  ||
||||  [[Image(mobicom_3.jpg, 640px)]]  ||


== Other Demonstrations Featuring WARP ==

In addition to the Mango team, two other groups gave demonstrations built on top of WARP.

||  [[Image(mobicom_5.jpg, 320px)]]  ||  [[Image(mobicom_6.jpg, 320px)]]  ||
||  '''(1)'''  ||  '''(2)'''  ||

'''(1) [http://dl.acm.org/citation.cfm?id=2643243 Co-primary Spectrum Sharing with Inter-Operator D2D Trial]''' - Markku Jokinen	, Marko Mäkeläinen, Tuomo Hänninen (University of Oulu)

'''(2) [http://dl.acm.org/citation.cfm?id=2641753 An Open-Source Development Platform for Long-Range UHF-Connected WiFi Hotspots]''' - Ryan E. Guerra, Narendra Anand, Edward W. Knightly (Rice University)