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dp qpsk(dsp)result problem

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(joined March 2015)
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i designed 2 channel wdm using dp-qpsk.. probllem is me not geting a good cconstellation diagram as i was getting in one channel..
i need to achieve spectral efficiency of 2

how can i check ber in this? or any other visualiser which can corroborate my system.please help

thanks very much in advvance

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    • #19939
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      Shivam Anand
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      i designed 2 channel wdm using dp-qpsk.. probllem is me not geting a good cconstellation diagram as i was getting in one channel..
      i need to achieve spectral efficiency of 2

      how can i check ber in this? or any other visualiser which can corroborate my system.please help

      thanks very much in advvance

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    • #20053
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      Damian Marek
      Participant

      I found that the symbol rate was set incorrectly. Setting the symbol rate to 37.5 GHs will make sure the default settings of filters are correctly set. Using the results in the constellation diagram you can see the SER (symbol error rate) or you can also use the BER Test Set to compare input and output sequences for a more empirical approach.

      There is also something going on with your Y polarized modulators but I’m not sure what it is.

      Regards

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