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How to convert M-ary sgnal to binary signal

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(joined July 2015)
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Hi all
I want to connect two blocks i.e. output of M-ary threshold Detector to the input of parallel to serial converter.But unable to connect due to different signal type. How to connect these to blocks?
Regards
Debanajan Sarkar

Responses (14):

    • #26067
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      Debanjan Sarkar
      Participant

      Hi all
      I want to connect two blocks i.e. output of M-ary threshold Detector to the input of parallel to serial converter.But unable to connect due to different signal type. How to connect these to blocks?
      Regards
      Debanajan Sarkar

    • #26069
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      alistu
      Participant

      Hi Debanjan,

      This is usually doen by using the decoding scheme corresponding to the coing scheme you have adopted at the transmitter to actually convert the binary signal into an M-ary signal in the first place. So can you please upload your design file if it is possible?

      Damian had formerly suggested something, but I don’t think this would work in your case:

      converter electrical signal to binary signal

      Regards

    • #26100
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      Subhash Arya
      Participant

      Try to use PSK decoder or any suitable decoder as suggested by Alistu and then connect parallel to serial converter.

    • #26117
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      Sasha
      Participant

      Hello Debanjan,

      As sir said you can use the PSK decoder. And also, In help section, in search tab, you can type “m-ary to binary” and click search you will get a list of all components related to m-ary to binary. You can choose the component what you are looking for.

      Regards,
      Sasha

      • #26143
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        alistu
        Participant

        Hi Sasha,

        Thank you for your very good suggestion. However, I would like to add that since the search process seems to be done by matching the search words to the words of the help sections, not necessarily all the search results correspond to the components with M-ary inputs and binary output.

        Regards

    • #26120

      Dear Debanjan,
      the ans is given in reply #26069 and #26100 you may find this helpful. please go through the attached image.

      Regards

    • #26122

      attachment.

      Attachments:
    • #26141
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      alistu
      Participant

      The reason I did not specifically name PSK decoder as the component that should be used for Debanjan’s purpose to solve his problem and have just mentioned “the decoding scheme regarding the coding scheme adopted” in my former reply was that I was not sure about the coding scheme used by Debanjan in his design. But what Subhash suggested is quite helpful if he has used PSK.

    • #26144
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      Debanjan Sarkar
      Participant

      Thanks to all.
      I have not used any generator or decoder. so i cant use psk decoder or any other decoder.

      Actually what i want to do is- I have used 8 bit stream. I have to divide it to I-arm i.e.even position bits and Q-arm i.e. Odd position bit. SO i have used Serial to parallel Converter. then i multiplied both the arm with cosine and sine wave receptively. Then i add the signal and send for receiver.
      IN receiver section i have follow the reverse process and at a stage i need to detect my signal so i used m-ary threshold detector in both arm. after that i need a parallel to serial converter as in transmitter section i used serial to parallel converter. but due to different signal type of output of threshold detector and input of converter i am unable to connect . please find the attachment where i have shown portion of my problem.
      please give a solution .
      regards

      Attachments:
      • #26149
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        alistu
        Participant

        I am trying to find out a solution to this. In the meanwhile, I would like to know why you have used one threshold at the threshold detector component, while you have used three amplitude levels. You can either use onethreshold with two levels, or two thresholds with three levels. Please see if this needs modification.

    • #26151
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      Debanjan Sarkar
      Participant

      Sorry alistu. I have done mistake ,Amplitude should be -1 1.Thank you.

      • #26153
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        alistu
        Participant

        Now based on the corrected threshold values of -1 and 1 I have managed to make the binary sequence using the PAM decoders. Please see the file attached. You can see the exact M-ary sequence can be seen using a binary visualizer after each of the two Pam decoders and after the parallel to serial converter.

        +1
    • #26155
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      Debanjan Sarkar
      Participant

      Thank you alistu. I will check and let you know.
      regards
      Debanjan

    • #26223
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      Debanjan Sarkar
      Participant

      Dear alistu thanks for your help and i have successfully implemented my circuit and it is working properly with pam decoder.
      thanks to all.
      regards
      Debanjan

      • #26224
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        alistu
        Participant

        You’re welcome Debanjan. I am glad to be hearing it.

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