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I want to implement DPSK(BPSK) modulator in optisystem 13 using delay feedback loop but I dont know what component should I use in place of 1 bit delay. Moreover I cant use the output of bit sequence generator at the input of electrical XNOR gate. Balanced modulator is also not present in optisystem 13. Kindly Help and guide. Schematic is attached.
Dear all
I am using the evaluation version of optisystem 13. i have encounter one problem while running one inbuilt example of “DPSK Step 3 – Pulse generator and decoding.osd”. According to me the output of DPSK sequence decoder should be same as input bit stream. But when I tried to run, the output of DPSK sequence decoder is showing only 0. please check the attachment .Please help me to understand what is wrong as I am new to this system.
RegardsTopic: Radio over fiber
DPSK is one of ROF modulation techniques,in this simulation at Tx the data are used to modulate three different carrier having frequencies 10,15,20 GHZ ,bandwidth= 1.5*Bit Rate which Bit Rate varying (0.5,1,1.5,2)GHZ These signals are
then combined using electrical power combiner and this combined signal is used to modulate an optical carrier of
frequency 193.1 THz using mach zehnder modulator (MZM), transmitted through the single mode fiber length varing (10,20,30,40 KM)
at RX These optical signals are then passed through optical band pass filters (frequencies 193.110 THz, 193.115 THz, 193.120)
in my simulation i used opti system 13 , Bit Rate 2 GHZ, length of SMF is 40 KM.
I modified it by using VCSEL instead of CW Laser , EDFA instead of optical amplifier and one user only for bit rate=10GHZ , varing distance from 10 km to 120 km but I found degradation results in BER analyzer, plz modify it for meTopic: Radio over fiber
DPSK is one of ROF modulation techniques,in this simulation at Tx the data are used to modulate three different carrier having frequencies 10,15,20 GHZ ,bandwidth= 1.5*Bit Rate which Bit Rate varying (0.5,1,1.5,2)GHZ These signals are
then combined using electrical power combiner and this combined signal is used to modulate an optical carrier of
frequency 193.1 THz using mach zehnder modulator (MZM), transmitted through the single mode fiber length varing (10,20,30,40 KM)
at RX These optical signals are then passed through optical band pass filters (frequencies 193.110 THz, 193.115 THz, 193.120)
in my simulation i used opti system 13 , Bit Rate 2 GHZ, length of SMF is 40 KM
I have a problem in matching o/p of BER analyzer of my simulation with this paper plz modify it and attach it for me.