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hi,i am mtech student and i am new user of optisystem. my query is how to generate downstream DPSK signal by using DFB laser and phase modulator(PM)?
Topic: DPSK RF Signal Generation
Dear friends
I am working on optisys 7.I want to generate DPSK signal.Apparently there is no DPSK signal generator in 7 version.Can anybody tell me how to generate it for using it on ROF link?Any alternative if not in 7 version?
regardsTopic: NRZ-DPSK & NRZ-DQPSK
Could anyone explain me about the components that used on NRZ-DPSK & NRZ-DQPSK format modulation on Optisystem? Thank you
Topic: free space optics
hello everybody,wishing u all a very happy and prosperous new year.Can anybody help me on the topic that what is the max range in free space optics has invented in recent research,i have designed a system using dpsk modulation which support max of 7000 mt.
is it correct or wrong i m confused.please hepl meTopic: error in simulation
this is the simulation of dpsk which i have implemented using dpsk modulation .the data i have sended is through fso, but i am not getting the results . kindly point out the query and explain it.
Topic: dpsk eye diagram error
this is the model of dpsk on optiwave site, eye diagram is correct but the ber in eyediagram is 1 . which shows the system is not correct .kindly explainTopic: NRZ DPSK
Could anyone please explain the sample file NRZ-DPSK.osd in the sub folder PSK systems in the folder advanced modulation systems.Thank you
Topic: threshold detector parameter
hello everyone
i am working on 8-psk modulation technique. but i am not getting how to set threshold detector input and output threshold to get the output. as i am setting the similar values as given in your dpsk modulation and demodulation tutorial, i am not getting the result of ber analyser. please help me out
thanking you
with regards
guddan kumariHi guys, I would like to ask you some questions.
Here I use modulation formats of CSRZ, NRZ, RZ, RZDPSK and RZDQPSK in each systems based on https://optiwave.com/resources/applications-resources/optical-system-advanced-modulation-formats/
The questions are:
1. I put OTDV after the last MZM to see how the signal are modulated in every format. But I’ve been confused why with CSRZ there’s no transition in every bit.
2. Why in NRZ and RZ there’s a delay for 1 bits in the beginning of transmit signal. Fyi, the information bit that I used is 1011.
3. Can you explain me how RZDPSK and RZDQPSK modulated the signal like that?
4. The comparison between receive signal in every format modulation?Thank you, hope to see the answers soon 🙂
Another parameter that I used:
-18 channel 1271 to 1611 nm
-CWDM
-FTTH
-Bitrate: 2,5 Gbps
-Power transmit: 7 dBm
-Liniar&nonlinear effectsTopic: Electrical CPFSK modulator
Hello friends,
I would like to know about electrical CPFSK modulator component in Optisystem in which there are two ports one is for binary input another one generates electrical output. i just wanna know that CPFSK is a modulation format like NRZ or RZ If yes then can i generate a signal like PBRS connected with CPFSK and then modulate with CW laser via MZM.
In some papers of Radio over Fiber they used directly as i mentioned but some paper uses like 10 gbps NRZ data is modulated with DPSK or what ever modulation they are using. I am confused because electrical CPFSK or DPSK cannot take electrical input if we generate data with NRZ and then modulate. Please help me out is CPFSK, DPSK etc are modulation formats like NRZ or RZ…….