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can i calculate BER from eye?

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arsenal

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eye opening ber

hi,

Can i calculate the bit error rate just from the eye diagram?

thanks a lot
arsenal
 

ber eye diagram

eye diagram will give amount of ISI in your system..it doesn't any thing other than this....
 

ber and eye diagram

electronics_kumar said:
eye diagram will give amount of ISI in your system..it doesn't any thing other than this....
Click to expand...

COULD you give some documents about EYE diagram in this forum?

I am confused about it!
 


interpreting eye diagram.pdf

forrest04 said:
electronics_kumar said:
eye diagram will give amount of ISI in your system..it doesn't any thing other than this....
Click to expand...

COULD you give some documents about EYE diagram in this forum?

I am confused about it!
Click to expand...


you can refer complextoreal.com website..there exists material for interpret eye diagram
 

ber to eye diagram

Hi

You can estimate ber if you have simulated with noise or measured eye.

I have compared such estimation with measured ber. And seen that results are in agreement.

Regards
 

calculate ber from eye diagram

hi Grig,

how do u do such kinda estimation?

thanks
arsenal
 

estimating ber from eye diagram

it looks no idea
 

isi vs ber

OK

BER~=0.5*erfc(A/nois*sqrt(2))
where noise is rms noise voltage at desision circuit input
A is eye opening at desision point

I seen that it is relatively good estimation (but not exact calculation!)

Regards
 

calculate ber

forrest04 said:
electronics_kumar said:
eye diagram will give amount of ISI in your system..it doesn't any thing other than this....
Click to expand...

COULD you give some documents about EYE diagram in this forum?

I am confused about it!
Click to expand...


from the amount of opening you can conclude the presence of ISI..if it is fully opened that indicates no ISI on the other end if it is fully closed there exists no ISI in the system.....moreover you can use the formula to find amount of
ISI= 20 LOG(h/H)....h ---> heights of horizontal opening(to be find from eye diagram) ,H----> height of horizontal opening for error free system take that as 100
 

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