Forum Replies Created

    July 28, 2015 at 8:46 am #22797
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    shamsudheen p
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    Hi Damien,
    Thank you. there is no errors now. I have modified the project for communication using white led and received the output.
    However, why i can”t reduce the frequency of output? or the output which i got is noise? I have changed the bit rate in layout parameter.
    Also, the data input to the user defined sequence generator is a binary converted image. I have tried to plot the same in optisystem but not succeeded. But it worked in matlab.
    I am attaching the output waveform here
    also the .txt file,receiver output and the matlab codes

    July 24, 2015 at 6:00 am #22698
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    shamsudheen p
    Participant

    Hi Damien ,
    I have checked the noise bins make it true. now matrix dimension mismatch error occurs for seqmatched,
    should i match the dimension of seqmatched and InputPort1.Sampled.Signal ? I have checked in workspace and not able to correct this. please help.
    I have changed the frequency of white light source to 500 nm

    July 21, 2015 at 1:11 pm #22620
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    shamsudheen p
    Participant

    Dear Damien, Thanks.it is working.
    I just replaced the cw laser with a white light source and checked the result. but error occurs. will it be due to sampling problems??

    July 15, 2015 at 11:10 am #22465
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    shamsudheen p
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    here is the matlab code,input to the user defined sequence and output obtained

    July 15, 2015 at 11:07 am #22463
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    shamsudheen p
    Participant

    h

    July 15, 2015 at 3:06 am #22427
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    shamsudheen p
    Participant

    Hi Damien, I have made some changes in my project file according to your suggestions. I am unable to view the output waveform. please help me to solve the issues.
    Attaching the .osd file, input file to the user defined sequence generator, matlab code and output waveform

    July 14, 2015 at 4:10 am #22402
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    shamsudheen p
    Participant

    yes i wish to modulate the laser in accordance with the input binary sequence

    July 13, 2015 at 3:20 pm #22393
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    shamsudheen p
    Participant

    Thank you Damian, It is working now. However the output frequency is very high.
    I wanted to load .dat file for the same type of output. Any other things to taken care for this?

    July 13, 2015 at 10:52 am #22387
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    shamsudheen p
    Participant

    Hai sam sung,
    I am able to co-simulate the matlab with optisystem. I was just trying out a simple programe code from the demo video. I want to modulate the laser according to the data which can be inputted as .dat file in the user defined sequence. The data is a binary valued(streams of 1’s and 0’s)

    June 3, 2015 at 2:55 am #21339
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    shamsudheen p
    Participant

    Hi Damian,
    I am working on the same visible light communiation as that of sindhu kathirvel. I want to input the data (eihter image or audio) which is fed to LED for modulation purpose. I came to know about using matlab component in optisystem. could you help me to solve this problem?

    June 1, 2015 at 8:14 am #21291
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    shamsudheen p
    Participant

    Thanks Abhishek Shrama and Sam Sung for your valuable response. I am having the doubt that even if I am using different modulations at the transmitter side, only one type of demodulation technique is used at the receiver. So can I have the same data at the receiver without using different demodulators?
    Dear Sam Sung, May I know how to compare the three modulations in one system?
    it would be very helpful if you attach a screen shot of the layout.