- This topic has 8 replies, 5 voices, and was last updated 7 years, 10 months ago by Pir Meher Ali Shah.
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January 1, 1970 at 12:00 am #80179rawa muayad mahmoodParticipant
(Awaiting moderation)
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January 1, 1970 at 12:00 am #82783rawa muayad mahmoodParticipant
(Awaiting moderation)
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September 9, 2014 at 6:20 am #13659Abdallah IsmailParticipant
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 #13673Abdallah IsmailParticipant
In another words what the values of EVM that is acceptable?
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September 9, 2014 at 10:30 am #13692Damian MarekParticipant
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
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October 8, 2015 at 10:50 pm #26039Dr. Dhiman KakatiParticipant
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
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October 10, 2014 at 1:01 pm #14149Ajay VyasParticipant
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 #25772Dr. Dhiman KakatiParticipant
I am also unable to calculate, only I got the theoretical concept and mathematical expression so please anyone help.
Regards
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October 4, 2015 at 8:17 am #25773Dr. Dhiman KakatiParticipant
Dear Ajay, In which paper you are you are working.
I am asking you me also working on the ROF full duplex communication.Regards
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April 5, 2016 at 3:16 pm #35743Dr. Dhiman KakatiParticipant
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 -
January 3, 2017 at 8:48 am #41886Pir Meher Ali ShahParticipant
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.
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