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    #40578
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    Marvi grover
    Participant

    Thank you so much 🙂

    #40138
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    Marvi grover
    Participant

    hello !!
    Can anybody tell me how to code the attenuation due to scintillation effect in MATLAB. i need to use a MATLAB code and produce the same effect on the signal as done by enabling ‘intensity scintillation’ parameter in optisystem.

    i shall be thankful to you
    Regards
    Marvi

    #40135
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    Marvi grover
    Participant

    in this case the power calculated manually is same as that given by optical power meter.

    #40126
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    Marvi grover
    Participant

    Hello Aabid!!

    i got to know my mistake. i was using the transmitted power as it is in the manual calculation.
    but my system had a MUX and modulator attached after the laser source which led to some power loss. so the actual power launched in th channel was less than 10dBm and this power was to be used in the calculation.
    i hope i am able to make my point.

    Regards
    Marvi

    #40037
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    Marvi grover
    Participant

    i am getting it as -35.2144 dbm and optical power meter gives it to be -38.421

    #40032
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    Marvi grover
    Participant

    Aabid bashir Baba and Sidra Khan

    i am using the unit mentioned in the ‘help’ for the link equation i.e. meters for the transmitter and receiver aperture,
    kilometers for the ‘range’, dB/km for the attenuation and milliradian for the beam divergence, transmitted power in dBm.
    i think received power should be in ‘dBm’.
    following parameters are used in the optisystem design.

    transmitter aperture:0.05 meter
    receiver aperture : 0.2 meter
    transmitted power : 10 dBm
    range : 1 kilometer
    attenuation: 25 dB/km
    beam divergence: 2 mrad

    you can use these parameters and check the results manually. please let me know your result. i might be doing some mistake. i am also attaching the .osd file for the results given by optical power meter.

    #40031
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    Marvi grover
    Participant

    Thankyou so much for having a look.
    i tried to connect the power meter after the ‘select’ component in my system, but the power still doesnt match with calculated one.

    #39885
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    Marvi grover
    Participant

    Sir

    In the optisystem ‘help’ of ‘FSO component’ , a link equation is given to calculate the recieved power.When i am calculating the received power manually using this equation, the result does not match with that given by the optical power meter in optisystem. please tell me why is this happening. i am attaching the snippets of optisystem and parameters used and also the matlab code used to calculate the power manually.
    please help me with this. i shall be really grateful to you.

    Regards
    Marvi

    #39870
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    Marvi grover
    Participant

    Thank you so much sir. I will look into these papers and revert back.

    Regards
    Marvi

    #39756
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    Marvi grover
    Participant

    the system used is attached here

    #38951
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    Marvi grover
    Participant

    thankyou so much everyone for your valuable suggestions. I will have a look into them.

    Regards
    marvi

    #38553
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    Marvi grover
    Participant

    Thankyou So much everyone….i’ll try the solutions suggested by you.

    #36121
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    Marvi grover
    Participant

    i am attaching the matlab file here.

    #35968
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    Marvi grover
    Participant

    yes …sure . iam attaching the osd file

    #35798
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    Marvi grover
    Participant

    this is the matlab file for the program