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Hello,
I’m trying to use the VSG60A 802.11n modulation to do PER testing with a Wi-Fi chip. The chip sees packets come through, but reports them all as having FCS errors. It looks like I need to craft the packet correctly to have the FCS field set (this is a CRC32 defined in 802.11 spec).
Has anyone done this before and can share advice? I tried to craft it by hand and also tried the scapy package, but I still get the FCS errors. Also, maybe some of the other modulation settings have an impact? I’m not sure. Any help is appreciated.
Thanks,
Steve
Steve,
I can’t guarantee this would work, but I might try using something like using Wireshark to grab a packet over a WIFI network then copying the payload into our software. Just make sure you are copying the FCS field as well.
If possible, an alternative might be to disable the FCS check (or ignore it), transmit a known payload and verify the payload at the receiver manually looking for bit errors. If you transmitted all 0’s/1’s it would be easy to verify.
Andrew
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