Results

Hi Jyoti Raina,
Your results are as expected, because when the Q-factor will go high the BER will definitely become low. and one more thing you need to be very much clear that BER or bit error rate is calculated from the no of bits that is received at the receiver (Which was transmitted from the transmitter section) by mistake or system. so for a system to be efficient it should have high Q-factor and BER as low as possible. and in you case you are getting better results. no need to worry about that. and I need to mention that you are not getting high bit error rate you can see that the power of 10 (i.e. “e”) is negative that means very low value. and BER of near to value 1 is not acceptable.

If you need further improvement in your system you can attach here with your design file so that I can have a look into it.

Thanking you..

Regards,
Dhiman

HELLO JYOTI RAINA..

Well i think you are interpreting the results for bit error rate in a wrong way.. You know for nay system to be designed or designed already what we desire is lowest possible value for bit error rate (BER) and when the value for BER will be 1 ..it means your system performance is very poor and low value for quality factor.. U must try to get your BER as low as possible i.e close to zero not 1..

I hope u understand .

Thanks & regards

Hello jyoti,
As far as your query is concerned , i completely agree with what fayiqa has stated here. What mostly we look for our system design is to work on least bit error rate and maximum quality factor pertaining to good overall performance of our system. So you should try to get it as small as possible which means higher negative raised to power term. In order words , e^-50 will give you better results than e^-12 or e^-10. I hope you find it helpful.
Regards

Hi jyoti raina..

Your bit error rate results are already better than the minimum acceptable value.
And like already mentioned by others , BER being equal to 1 indicates worst possible performance by the system.
I hope it is clear to you by now.

Regards
Naazira.

Hi All

As rightly mentioned by forum members above jyoti you need to get your BER aa low aa possible and that would be by making the negative term raised to power e as high as possible and u want ur quality factor to be high. That is how you move towards having better result and a perfect eye in BER analyzer.

Regards

Burhan

Hi jyoti raina

Yeah that seemed to be a mistake actually. And regarding the help about better result i would suggest you to upload your .osd file of the project you are working upon . That would give direction to our help for you in case of your project precisely.

Regards

Burhan

Bit error rate is less than 10^-9 so it is good response u are getting. as all are replying that u misinterpret this i think u would be able to move on further with your project. thank you

Hi Jyoti Raina,

I too agree with Sanjeev Kumar that if Bit error rate in your system is less than 10^-9…. The response is no doubt good.. Also increasing power level and the length of edfa will help you improve your results as you might have allready observed from your design…

Thanks and Regards

Sahil Singh

Hi Jyoti Raina,
I AGREE to points of Dhiman as he said Your results are as expected, because when the Q-factor will go high the BER will definitely become low. and BER of near to value 1 is not acceptable.
BER of value greater than 10^-07 is not acceptable .
I will also ask you to reduce transmitter power because 10 dbm is very high, You should reduce transmitter power to upto 4 dbm.
Here i am attaching 32 channel CSRZ WDM SYSTEM for long haul communication system.
Sometimes we could change the filter order and bandwidth to get better results.
Hope my response could help you.

Hi Ranjeet Kumar,

You mentioned it correctly that changing the order of the filter as well as the bandwidth can give better results…. Hope it helps jyoti raina…

Regards

Sahil Singh

hi jyoti rana .. as all said your results are quite good… if you BER make it to zero your system is consider to be a under utilized performance coz BER zero is only possible for ideal system which is not possible in practical aspect.. if still to want to get .. you can try by reducing fiber length ..increasing gain after fiber .. change photodector APD insated of PIN .. or by reduing noise in photodector .. linewidth can also be reduced ..

Hi Sahil singh,
Yeah, i am sure about changing the order bandwidth and cutoff frequency of different filter at the receivers end to get better results as per our requirement of design in WDM system.
usually changing using filter order of 3 or 4 gives better results then using order 2.

Hi Ranjeet Kumar,

I totally agree with you that better results are obtained using filter order 3 or 4 as compared to the results obtained from using the filter order 2… I beleive that as we increase the order of the filter the more accurate the results are obtained…

Regards

Sahil Singh

Yeah, Sahil singh
as we increase the filter order upto a certain limit we would have better Min. BER and max. Q-Factor.
Because it filter more accurate and with high attenuation in stop band.

Hi Ranjeet,

I agree with you that we as we increase the filter order upto a certain limit we would have Min. BER and max. Q-Factor…. Thanks for your reply…

Regards

Sahil Singh

hi ranjeet …. i am too agree with .. thank for making point of this..