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Thread: Interference on a MW link in Pathloss

  1. #1
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    Default Interference on a MW link in Pathloss

    Dear all friends,
    I design a MW radio network with 6 links. One end of these links is in same location. I assign some frequency channels to these links and do interference calculation with Pathloss. All frequency channels are in 7GHz band. With my frequency channel arrangement, threshold degradation in all links is below 1 dB level.
    Everything is OK but in worksheet module of a link flat fade margin is degraded harmfully. Full report of this link contains following items:;

    Site A, Site B
    RX signal (dBm) -36.46 , -36.46
    Thermal fade margin (dB) 33.04 , 33.04
    Number of exposures 1 , 2
    Interference fade margin - multipath (dB) 41.17 , 18.19
    Flat fade margin - multipath (dB) 32.42 , 18.05

    I change frequency channels of this link to another band but worksheet doesn't change and I achieve same result.

    What is the problem? I am confused.
    Can anyone help me about this issue?

    Thanks a lot,

    Mohamad

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  3. #2
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    Post complete interference calculation sheet so we can see what's the problem (interference > reports > case detail).
    My guess is bad radio model, to be more specific, bad adjacent channel filtering.

  4. #3
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    Dear byja,
    Here attached interference case detail report and worksheet full report of interfered link. As you see in case detail report, there is no threshold degradation more than 1dB but in worksheet flat fade margin in NS station is more degraded.
    Regards
    Quote Originally Posted by byja View Post
    Post complete interference calculation sheet so we can see what's the problem (interference > reports > case detail).
    My guess is bad radio model, to be more specific, bad adjacent channel filtering.
    Attached Files Attached Files

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