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Full Name | zsliu |
Organization | NTU |
Job Title | RF |
Country |
Forum Replies Created
Dear Damian,
Thank you so much for your answer.
any one can help me to take a look at the attached above? Thank you so much.
finally, I got the more reasonable modulation response. however the curve starts rising around 2.4GHz as shown in fig. some parameters may not be proper.
Damian, thank you so much for helping me lots on the rsoa module. The modulation bandwidth is still so high, more than 6 GHz when I used the linear gain approximations. I tried to change some parameters. however I havent figured out. any suggestion?
Hi,Damian
I tried the linear gain approximations, which is generally used for bulk RSOAs. However, the results are not correct. I even cannot get sin waves . I haven’t figured out where the problem is. could you please help me?
Thanks
sorry the second file is too large. I just extracted the corresponding page
please find the files
yes. please find the two attached documents. the curve in first file page14. the parameters are in the second file at page92.
Thank you so much for your reply. The modulation bandwidth is generally less than 2GHz in a real RSOA component. the shape is going high from 100 MHz, may be increased by more than 5dB, then going to drop, even if I changed some parameters.
Hi, Damian,
as you suggested, i can detect the peak around frequency. now the problem is the modulation bandwidth unlike real RSOA which show us low pass property. any suggestion on that? thanks
Zhansheng
Thanks. please file the attached for M-file.
I have figured out. the code should be as following.
As=1; % amplitude of sine wave
fc=Parameter1*1e9; % sine wave with 15 GHz
fs=Parameter2; % sample rate
tw=Parameter0; % time window
t=[0:1/fs:tw-1/fs];
Time = t;
cs = length(t);
sw = As*sin(2*pi*fc*t);
OutputPort1.TypeSignal = ‘Electrical’;
OutputPort1.Noise = [];
OutputPort1.IndividualSample = [];
OutputPort1.Sampled.Signal = sw;
OutputPort1.Sampled.Time = t;
just to upload osd file. it maybe has problem to pass global parameters sample rate and time window to matlab. but even I used fs=640e9; tw=12.8e-9; the output is still null.
Hi Damian,
is it possible to set the frequency of Quadrature Modulator to 0 Hz in order to get a baseband signal? and how to set the quadrature demodulatr cutoff frequency?
Dear Damian,
Thank you for your reply. I thought I would have to use cosimulation with matlab to generate ofdm.
thanks again