Error vector Magnitude

This topic has 8 replies, 5 voices, and was last updated 6 years, 8 months ago by Pir Meher Ali Shah.

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- January 1, 1970 at 12:00 am #80179
  
  rawa muayad mahmood
  Participant
  
  (Awaiting moderation)
- January 1, 1970 at 12:00 am #82783
  
  rawa muayad mahmood
  Participant
  
  (Awaiting moderation)
- September 9, 2014 at 6:20 am #13659
  
  Abdallah Ismail
  Participant
  
  Dear,
  If i use Decision component from Demodulator/Receiver Library for DP-QPSK Rx after DSP.
  and EVM is 6.34% ,How can i expect BER?
- September 9, 2014 at 7:27 am #13673
  
  Abdallah Ismail
  Participant
  
  In another words what the values of EVM that is acceptable?
  - September 9, 2014 at 10:30 am #13692
    
    Damian Marek
    Participant
    
    There is not a simple relation between EVM and BER, because depending on the constellation diagram the EVM could have a larger or smaller impact. Closely packed constellation diagrams with the same EVM will likely have a worse BER.
    
    Searching for papers, I came across this one that aims at relating the two quantities. From a quick glance I’d say less that 10% EVM is critical for a quality system.
    
    http://www.ee.ucl.ac.uk/lcs/previous/LCS2000/lcs057.pdf
    
    Regards
    
    +3
    - October 8, 2015 at 10:50 pm #26039
      Dr. Dhiman Kakati
      Participant
      
      Dear Damian I got a relationship between BER and EVM in one paper. Please find the attache image and pdf.
      
      in the attached iamge Q() is the Gaussian co-error function and is given in the 2nd attached image.
      and in the pdf page no 263.
      
      Thanks.
      
      Regards
      
      Attachments:
      EVM-ok.jpg
      gaussian.jpg
      
      1-s2.0-S1068520014000297-main.pdf
      
      +2
- October 10, 2014 at 1:01 pm #14149
  
  Ajay Vyas
  Participant
  
  Hello sir
  We are using optisystem 13 version . We areworking on RoF how We can Measure EVM & ACPR
- October 4, 2015 at 8:15 am #25772
  
  Dr. Dhiman Kakati
  Participant
  
  I am also unable to calculate, only I got the theoretical concept and mathematical expression so please anyone help.
  
  Regards
- October 4, 2015 at 8:17 am #25773
  
  Dr. Dhiman Kakati
  Participant
  
  Dear Ajay, In which paper you are you are working.
  I am asking you me also working on the ROF full duplex communication.
  
  Regards
- April 5, 2016 at 3:16 pm #35743
  Dr. Dhiman Kakati
  Participant
  Hello Everyone I am attaching herewith 2 snapshot to let you know how you can see by tick marking the EVM (%) for Decision Components result.
  This is the easiest way to find EVM. Thanking you.
  
  Regards,
  Dhiman
  Attachments:
  EVM-1.jpg
  EVM-2.jpg
- January 3, 2017 at 8:48 am #41886
  Pir Meher Ali Shah
  Participant
  I am sending you the attachment of “Decision” component but there isn’t any option of calculating EVM. I am using opti system version 14.
  Attachments:
  123.jpg
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