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IWR6843: Interference with 802.11ad (WiGig)

Francois Charlot
Mastermind 23077 points
Part Number: IWR6843

Hello,

Could you please comment on the possible disturbance some 60 GHz WiGig equipment could cause to a radar sensor operating in the same frequency band?


Thanks,
François.

  • 0
    TI__Mastermind 21295 points
    Hi Francois,

    I am checking with our systems team and should have a response within one to two days.

    Regards,
    John
  • 0 in reply to JohnH
    TI__Mastermind 21295 points
    Hi Francois,

    802.11ad could lead to a noise floor rise that will reduce the maximum range of the radar. It should not create any ghost objects. FMCW radars are naturally resilient to wideband interferers, with a suppression of interference of f_IF_BW/f_RF_BW. For IWR6843, typical IF bandwidth is 10MHz and RF bandwidth can be up to 4GHz, providing a 26dB suppression of interference. Also, if 802.11ad and the radar are using separate frequency channels, the impact should be negligible.

    Regards,
    John
  • 0 in reply to JohnH
    Intellectual 600 points

    Dear Technical support,

    I thank you for your answer.

    So I understand that FMCW is robust enough against 802.11ad communication.

    And what about the opposite? I mean robustness of 802.11ad against FMCW? I was thinking about something similar to the immunity of a DVB-T channel to an impulsive noise (short bursts into the same channel) for terrestrial broadcast application. For example, C/I (Carrier to Interference ratio) is typically of -1.4dB for 40 pulses per burst, 250ns pulse duration, 10µs burst duration and pulse spacing between 0.5µs and 1µs).

    In fact, I am trying to figure out how to extrapolate the impulsive interferences to a FMCW signal.

    Looking forward to having some feedback from your side.

    Best regards.

    Anthony (Technicolor France)

  • 0 in reply to Anthony Pesin
    TI__Mastermind 21295 points
    Hello Anthony,

    As our focus is FMCW, we do not have any analysis for that interference scenario.

    Regards,
    John