release notter (1.4.0)

[JiaoXianjun]

• Major update to more popular Raspberry PI OS (based on ADI Linux 2021_r1)
  • Raspbian 11.2 bullseye
• More WiFi security research friendly: Successfully run following security test tools by https://github.com/vanhoefm
  • https://github.com/vanhoefm/fragattacks
  • https://github.com/vanhoefm/krackattacks
• Major update to newer FPGA toolchain Vivado 2021.1 (based on ADI HDL 2021_r1)
• More openwifi based research results: https://github.com/open-sdr/openwifi/blob/master/doc/publications.md
• More hardwares: sdrpi, antsdr_e200, neptunesdr (non official yet), PYNQSDR (non official yet)
• Single SD card image for both 32bit and 64bit hardware
• Correct the SIFS (Short Inter Frame Spacing) value in 5GHz 10 --> 16us
• More parameters (fft_win_shift) for PHY OFDM receiver
• Split FPGA source code (openwifi-hw) and FPGA bitstream files (openwifi-hw-img)
• Better RF. Sensitivity same as COTS WiFi chip. EVM even meet #wifi7 requirement.
• The ACK Tx timing depends on PHY decoding latency (depends on how many bits in the last OFDM symbol received)
• FPGA internal loopback works now: https://github.com/open-sdr/openwifi/blob/master/doc/app_notes/packet-iq-self-loopback-test.md#csi-fpga-self-loopback-quick-start
  

openwifi 42e8e67
openwifi-hw open-sdr/openwifi-hw@af0bc1a
openofdm open-sdr/openofdm@19acdbe
openwifi-hw-img open-sdr/openwifi-hw-img@b6b3600

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This discussion was created from the release release notter (1.4.0).