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BER Tester Setting

(joined March 2019)
Participant

Hello
Why the reading of BER tester is different,when i use the two different sequence length of the same system. Are there some setting steps to obtain the same reading ?
for example : DP-16QAM transmission in Back-to-Back investigation
Bit rate =160 Gbps
sequence length=65536
no. of sample per bit=16
symbol rate=20 GS/s
BER=0
in case of sequence length =16384
BER = 0.5

Responses (1):

    • #56567
      adnan ali
      Participant

      Hello
      Why the reading of BER tester is different,when i use the two different sequence length of the same system. Are there some setting steps to obtain the same reading ?
      for example : DP-16QAM transmission in Back-to-Back investigation
      Bit rate =160 Gbps
      sequence length=65536
      no. of sample per bit=16
      symbol rate=20 GS/s
      BER=0
      in case of sequence length =16384
      BER = 0.5

    • #56568
      Dhiman Kakati
      Participant

      (Awaiting moderation)

    • #56875
      Profile Photo
      Ahmad Atieh
      Participant

      Dear Adnan,
      In advanced modulation schemes such as 16QAM, the simulation requires long sequence length to provide meaningful results. This is also something you have to set on instruments. You need to use long enough length to allow the system to provide proper results.
      Usually, it is recommended to increase the sequence length and monitor the BER/SER and continue increase until the results are relatively close and stabilize.

      Regards,
      Ahmad

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