- This topic has 11 replies, 5 voices, and was last updated 7 years, 4 months ago by SAHOUI ELARABI.
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January 24, 2017 at 2:48 pm #42241Jayeshkumar PrajapatiParticipant
Please can you suggest me some preferable values of BER and EVM for WDM OFDM based ROF system up to 1000 to 2500 Km channel span?
suggest me good reference if you can please… -
February 10, 2017 at 6:40 am #42367Jayeshkumar PrajapatiParticipant
please i need your valuable comments on my question…
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February 12, 2017 at 10:54 pm #42369Priti GargParticipant
BER should be within10^-9 to 10^-12
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February 22, 2017 at 2:04 am #42516Dr. Dhiman KakatiParticipant
Hi Preeti,
BER should be less than 10^-9 in electrical domain.Regards,
Dhiman
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February 16, 2017 at 11:47 pm #42461Abhilash AchantaParticipant
Hi Jayeshkumar,
I am also working on RoF link. However, I am not considering WDM in my work and my range is upto 70 Km
Acceptable BER for RoF links is upto 10e-3. This value is known as ‘FEC limit BER’. This means that the we can tolerate any BER less than 10e-3 and the Forward Error Correction Codes (FEC) help in bringing down the BER to less than 10e-9.
I suggest that you run your simulation for different fiber lengths and check at what length BER is attaining 10e-3. This is the maximum distance your link can have.
I had attended an IEEE conference recently and one of them presented their work – BER comparison in ROF links.
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February 17, 2017 at 2:49 am #42463Priti GargParticipant
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 -
February 17, 2017 at 3:50 am #42464Abhilash AchantaParticipant
There is no standard values for BER as such. It depends on the components on the link such as Laser, fiber’s attenuation, amplifiers and photodetectors. For whatever length you simulate, you MUST ensure that BER is below 10e-3.
When I ran my simulation for OFDM based 16-QAM link at 20 Km length, the BER value was zero. -
February 23, 2017 at 2:47 pm #42547Priti GargParticipant
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
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February 23, 2017 at 3:04 pm #42549Priti GargParticipant
I am attaching screen shot as I could not attach file
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February 24, 2017 at 12:28 am #42552Abhilash AchantaParticipant
No. Not at all acceptable. BER of 0.06 means there are 6 errors for every 100 bits of data. This cannot be corrected using FEC.
So, try reducing the fiber length until you get BER of 10e-3 which is acceptable
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February 24, 2017 at 10:16 am #42557Priti GargParticipant
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
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July 8, 2017 at 5:08 am #44383SAHOUI ELARABIParticipant
hi abhilash_achanta
please, could you upload the paper where you got the BER less than 10-3?
regards
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