content/stands/openwifi.md

   1 ---
   2 description: "openwifi: opensource WiFi chip!\r\n\r\nFeatures:\r\n802.11a/g/n\r\n\
   3   20MHz bandwidth; 70 MHz to 6 GHz frequency range\r\nMode tested: Ad-hoc; Station;\
   4   \ AP, Monitor\r\nDCF (CSMA/CA) low MAC layer in FPGA (10us SIFS is achieved)\r\n\
   5   Configurable channel access priority parameters:\r\n    duration of RTS/CTS, CTS-to-self\r\
   6   \n    SIFS/DIFS/xIFS/slot-time/CW/etc\r\nTime slicing based on MAC address\r\nEasy\
   7   \ to change bandwidth and frequency:\r\n    2MHz for 802.11ah in sub-GHz\r\n   \
   8   \ 10MHz for 802.11p/vehicle in 5.9GHz\r\nCSI (Channel State Information, freq offset,\
   9   \ equalizer to computer)\r\nIQ capture (real-time AGC, RSSI, IQ sample to computer)\r\
  10   \nOn roadmap: 802.11ax"
  11 layout: stand
  12 logo: stands/openwifi/logo.png
  13 new_this_year: |
  14   <p>We have updates across our projects since FOSDEM'20:</p>
  15   <ul>
  16     <li>802.11n (WiFi4)!</li>
  17     <li>Port the design from a single type of FPGA dev board to 6 types of boards! From high end (as expensive as 3600USD) to low end (900USD).</li>
  18     <li>Low latency ping RTT (Round Trip Time): 200~300us.</li>
  19     <li>Essential improvement on stability, 802.11 compatibility and performance cross FPGA and Linux driver.</li>
  20     <li>Increase the FPGA packet queue from 2 to 4, meet the Linux mac80211 requirement/assumption about QoS/Priority-strategy better.</li>
  21     <li>Channel estimation and frequency offset compensation bug fix on the OFDM receiver. Better reception performance.</li>
  22     <li>CSI (Channel State Information) interface from FPGA to Linux. And it doesn't affect normal WiFi communication.</li>
  23     <li>IQ sample interface from FPGA to Linux. And it doesn't affect normal WiFi communication.</li>
  24     <li>Open the idea to Low cost SDR openwifi dongle (+/-200USD) and real chip tape out!</li>
  25   </ul>
  26 showcase: "All of those opensource hardware projects are focusing on the CPU side:\r\
  27   \nRISC-V, all kinds of open CPU cores, Raspberry PI, xxxx PI, PINE64, openWRT, AI/machine-learning\
  28   \ accelerators.\r\nHowever the radio connectivity part of those opensource hardware\
  29   \ boards are still from black-box silicon (commercial chips, like WiFi chips from\
  30   \ big companies).\r\nOpenwifi project, which was announced in the FOSDEM'20, is\
  31   \ the first attempt to build an opensource chip in the radio connectivity domain!\r\
  32   \nNow we have tested the design on the FPGA development board (SDR -- Software Defined\
  33   \ Radio), and it works well in the real world scenario. Meanwhile we also add some\
  34   \ unique features that commercial chips don't have.\r\n\r\nWe hope more people can\
  35   \ come and think about the opensource activity in the radio chip domain, and invest\
  36   \ more in this domain!\r\n\r\nWe are also eager to seek people's voice and help about\
  37   \ the idea of: Low cost SDR openwifi dongle (+/-200usd) and chip\
  38   \ tape out!"
  39 themes:
  40 - Hardware
  41 title: openwifi
  42 website: https://github.com/open-sdr/openwifi
  43 show_on_overview: true
  44 chatroom: openwifi
  45 ---