Abdallah A. I. Ali

7 Questions 9 Answers 0 Followers

Questions related from Abdallah A. I. Ali

How to map PRBS pattern to probabilistic shaping 16-QAM instead of uniform 16-QAM?

I want to generate a probabilistic shaped 16-QAM signal without using FEC (channel coding) (i.e. away from coded modulation ). Simply I need to implement distribution matcher ( or a bit mapper or...

03 January 2019 8,901 2 View

Phase Mismatch Constant with dispersion slope?

When I expand the phase mismatch (for three signals interacting nonlinearly in optical fiber delta-beta with dispersion slope (dB = B(f1) + B(f2) - B(f3) - B(f1+f2-f3) , where B (Propagation...

09 July 2017 6,761 3 View

Why Optical Phase Conjugation is equivalent to spectral inversion?

I need to know the phase conjugation is equivalent to the spectral inversion. The math can help me more in understanding. If I have a signal X+jY, if I converted it to X-jY, It will be spectrally...

07 April 2016 6,206 1 View

How can I simulate WDM multiplexing system in matlab? and how to include line width in your simulation?

I am trying to simulate the whole long haul optical transmission system in the matlab. However, I have a doubt about the PM-QPSK-WDM system because I don't know how to include the linewidth in...

07 September 2015 8,218 2 View

How can I simulate the PM-QPSK-WDM system in Matlab?

I'm studying the impact of nonlinearity on system performance in long haul transmission system. So, I need to simulate the system completely with Matlab without any optical simulation tools like...

07 September 2015 7,236 4 View

How can we simulate the nonlinearity in coherent optical communication system, where it is a self phase modulation, which produce phase error?

I used optisystem to simulate the nonlinearity impacts on PM-QPSK system with single mode fiber, however, the phase correction in DSP at the receiver remove the effect of nonlinearity, which is a...

30 April 2015 9,329 1 View

In coherent optical Comm. sys. (PM-QPSK),How can you measure the effect of non-linearity on BER in case of having a phase correction(DSP) in the Rx ?

I'm simulating the optical PMD-QPSK using optisystem,and I'm measuring the effect of Nonlinearity on BER,and the problem that I'm using a DSP for compensating the Dispersion,Polarization...

12 March 2015 8,355 7 View