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Full Name | Priti Garg |
Organization | Anna University |
Job Title | research fellow |
Country |
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I am trying to simulate a 64 QAM OFDM coherent detection system
As far as i know the symbol rate should be 1/6 of bit rate but my simulation not accepting these values rather it is working fine for 1/5 of bit rate and giving huge EVM
Regards
hi
There is a QAM file given in samples/ Advanced modulation formats/QAM
In the same file u can remove DSP block
but performance will come down.
hope it helps
hi
cant see ant attachment pls try to take a screenshot and upload.
u can refer to this link
https://staging.optiwave.com/category/optisystem-manuals/optisystem-tutorials/
also go through the example files in the optisystem.
hope it is useful
Please attach your file or the screenshot of your setup, so that others can help.
please help
hi
constellation diagram can be viewed in electrical domain only in optisysem
hi
Another thing i want to know is what other alternative we have for RSOA?
Can it be replaced by VCSEL?
Hi Prashant
I cannot see any file
please attach a screen shot
Regards
Hi Abhilash
thanks or your reply.
As far as i read from previous posts we can not use BER analyser to measure BER for an OFDM system and we should use BER test set instead.
Is there any other way to measure BER in an OFDM system ?
Regards
hi Damian
I read in one of the posts that there is a bug in BER test set, i am using it to find BER for an ofdm based system can u please clarify.
I am attaching screen shot as I could not attach file
Attachments:
Hi Abilash
i am attaching one sample file on OFDM if irun this i getBER =0.06 on BER test set, is it acceptable?
Regards
Hi Dhiman
1. please guide me on the range for power so that it can be detected at the receiver.
as pointed by you I get very low power at receiver, it is -58 dBm at input to coherent receiver.
2. Also in a bidirectional fiber link should i try to boost power using amplifier or will it further degrade BER?
3. Which kind of amplifier should i use?
Regards
Thanks for sharing useful information
can you suggest what BER i should expect for an OFDM based QAM 16 link of 20 km length
Thanks