Error vector Magnitude

[rawa muayad mahmood]

(Awaiting moderation)

[rawa muayad mahmood]

(Awaiting moderation)

[Abdallah Ismail]

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?

[Abdallah Ismail]

In another words what the values of EVM that is acceptable?

[Damian Marek]

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

[Dr. Dhiman Kakati]

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

[Ajay Vyas]

Hello sir
We are using optisystem 13 version . We areworking on RoF how We can Measure EVM & ACPR

[Dr. Dhiman Kakati]

I am also unable to calculate, only I got the theoretical concept and mathematical expression so please anyone help.

Regards

[Dr. Dhiman Kakati]

Dear Ajay, In which paper you are you are working.
I am asking you me also working on the ROF full duplex communication.

Regards

[Dr. Dhiman Kakati]

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

[Pir Meher Ali Shah]

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.

[Author]

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