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: "1. Port the design from a single type of board to 6 types of boards!\
  14   \ From high end (expensive) to low end (cheap for entry)\r\n2. Low latency ping:\
  15   \ 200~300us round trip.\r\n3. Important improvement on stability and performance.\r\
  16   \n4. Increase the packet queue from 2 to 4 in FPGA, meet the Linux mac80211 requirement/assumption\
  17   \ better.\r\n5. Channel estimation and bug fix on the OFDM receiver. Better reception\
  18   \ performance.\r\n6. CSI (Channel State Information) interface to Linux. And it\
  19   \ doesn't affect normal WiFi communication.\r\n7. IQ sample interface to Linux.\
  20   \ And it doesn't affect normal WiFi communication.\r\n8. Low cost SDR openwifi dongle\
  21   \ (<100usd) and chip tape out plan are under preparation. Stay tuned!"
  22 showcase: "All of those opensource hardware projects are focusing on the CPU side:\r\
  23   \nRISC-V, all kinds of open CPU cores, Raspberry PI, xxxx PI, PINE64, openWRT, AI/machine-learning\
  24   \ accelerators.\r\nHowever the radio connectivity part of those opensource hardware\
  25   \ boards are still from black-box silicon (commercial chips, like WiFi chips from\
  26   \ big companies).\r\nOpenwifi project, which was announced in the last FOSDEM, is\
  27   \ the first attempt to build an opensource chip in the radio connectivity domain!\r\
  28   \nNow we have tested the design on the FPGA development board (SDR -- Software Defined\
  29   \ Radio), and it works well in the real world scenario. Meanwhile we also add some\
  30   \ unique features that commercial chips don't have.\r\n\r\nWe hope more people can\
  31   \ come and think about the opensource activity in the radio chip domain, and invest\
  32   \ more in this domain!\r\n\r\nWe are also eager to hear from people about the idea\
  33   \ (under internal preparation): Low cost SDR openwifi dongle (<100usd) and chip\
  34   \ tape out plan."
  35 themes:
  36 - Hardware
  37 title: openwifi
  38 website: https://github.com/open-sdr/openwifi
  39 show_on_overview: true
  40 chatroom: openwifi
  41 ---