Wire and wireless using ofdm

[sobana a]

Hai…
I need to know whether my simulation setup is correct …..I’m providing equal power to wire and wireless service simultaneously also using FBG for both the service……For wired service i have used OFDM demodulator but for wireless service i just used PIN,and LPF…..I got min BER and eye diagram for wired service….but not able to get for the wireless service….plz check my simulation setup which i have attached with this below…..

Attachments:

1. OFDM-UWB-edited-1-wire-and-wireless.osd

[alistu]

Which version of Optisystem are you using? there have been some problems with OFDM blocks in the versions older than 13 I guess.
have a look:

OFDM , QAM 64

[Dr Rk Sethi]

Unfortunately, I can’t open your file with my version of OptiSystem. Can you please attach / upload a screen shot of the project?

[sobana a]

Im using optiwave version 12

Attachments:

1. OFDM-UWB-edited-1-wire-and-wireless1.osd

[alistu]

I’ve had problems with Optisystem v.12 OFDM blocks too. That’s probably what causes the problem. Please Take a look at the posts made by Damian on the link I gave you.

[sobana a]

screen shots for transmitter, wire and wireless side

Attachments:

1. 

   transmitter.png
   

2. 

   wire.png
   

3. 

   wireless.png
   

[sobana a]

i need only to access the wireless part..the blocks which i have included whether it is correct for wireless or need to change….

[alistu]

Why don’t you use the Matlab component to make OFDM blocks? That way, at least you are sure the problem is not due to OFDM blocks.

[sobana a]

i dont know where i have to insert the OSNR component in optiwave v 13….whether after fiber or befor fiber?

[alistu]

That depends.
Do you want to measure OSNR before or after the the line? Put it there.

[sobana a]

Thanks………….For wireless accesss i have been using Optical heterodyne….my demodulator is ofdm demodulator…..but i can,t get the BER and eye diagram…here i have attached my wireless section at receiver side.

Attachments:

1. 

   Capture.png
   

[Damian Marek]

Hi Sobana,

I’ve mentioned this to other users here, but I see that you are using the OS 12 OFDM components, which we kept in OptiSystem 13 for our users. The new OFDM components are highly recommended as they make using them much easier.

As a side note, if you click the OS 12 OFDM Demodulator and then press CTRL+F the component will be oriented in the right direction.

Regards

[sobana a]

i’m using optiwave 13…

[sobana a]

whether min BER can be ‘0’???

[Dr Rk Sethi]

Hi Sobana a!
BER is the ratio of “the number of bits in error” divided by “the total number of bits”.
therefore its minimum value of the BER can be zero and maximum value can be one.

[sobana a]

Whether power should be within -10 to +10 dBm?

[sobana a]

in optiwave 13 whether multiple graphs can be drawn…like comparison between RZ and NRZ , OFDM with and without FBG…..

[Abhishek Shrama]

you can take any value of power but as you increase power non-linear effects come into play.it also increase the calculation time

[Author]

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