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Minor Changes here and there

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This commit is contained in:
Silas Oettinghaus
2024-08-16 10:08:50 +02:00
parent 3f089dca9f
commit 793a5b7efd
7 changed files with 100 additions and 68 deletions
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14
Classes/03_receive/Photodiode.m
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@@ -7,7 +7,7 @@ classdef Photodiode
responsivity
dark_current
temperature
nep
randomkey
randomstream
@@ -22,6 +22,7 @@ classdef Photodiode
options.responsivity = 1;
options.dark_current = 0;
options.temperature = 20;
options.nep = 0; %(Moveit IMDD Standard: 1.8e-11) noise effective power in pA/sqrt(Hz); usually between 10-20 pA; see J.Leibrich Diss/ S. Pachnicke Slides
options.randomkey = 1;
end
@@ -71,11 +72,16 @@ classdef Photodiode
yout = yout + shot_noise;
% Thermal Noise
therm_current_psd = (2 * k * T / R ) ; %squared
therm_current_psd = 1.8e-11^2;
% NEP is noise equivalent power, see Dissertation j. Leibrich
% P. 121 or Stephan Pachnicke Optical Comm. Lecture Slides
if obj.nep == 0
nep_squared = (2 * k * T / R ) ; %squared
else
nep_squared = obj.nep^2;
end
Bw = obj.fsimu;
therm_noise_pow = therm_current_psd * Bw; %squared
therm_noise_pow = nep_squared * Bw; %squared
therm_noise = sqrt(therm_noise_pow) .* randn(obj.randomstream,size(yout,1),1);