80 lines
2.1 KiB
Matlab
80 lines
2.1 KiB
Matlab
classdef Opticalsignal < Signal
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%OPTICALSIGNAL Summary of this class goes here
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% Detailed explanation goes here
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properties
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nase
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lambda
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polrot
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end
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methods
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function obj = Opticalsignal(signal, options)
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%OPTICALSIGNAL Construct an instance of this class
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% Detailed explanation goes here
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arguments
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signal
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options.fs
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options.logbook
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options.lambda
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options.nase
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options.polrot
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end
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obj = obj@Signal(signal);
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fn = fieldnames(options);
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for l = 1:numel(fn)
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obj.(fn{l}) = options.(fn{l});
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end
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end
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%%
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function [obj,delay_n] = delay(obj,options)
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arguments
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obj Opticalsignal
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options.delay_meter double = 0
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options.delay_samples = 0
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end
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if options.delay_meter ~= 0
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delay_t = options.delay_meter /(physconst("LightSpeed")/1.4677);
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delay_n = delay_t .* obj.fs;
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else
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delay_n = options.delay_samples;
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end
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obj.signal=delayseq(obj.signal,delay_n);
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end
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function cspr = cspr(obj)
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carrier_power_dbm = pow2db( abs(mean(obj.signal)).^2 ) +30; % dB -> +30 -> dBm
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signal_power_dbm = obj.power;
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cspr = carrier_power_dbm-signal_power_dbm;
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carr_lin = abs(mean(obj.signal)).^2;
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sign_lin = mean(abs(obj.signal).^2);
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cspr_lin = pow2db(carr_lin/sign_lin);
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%carrier power is the mean value of the overall signal -> dc part
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c = abs(mean(obj.signal)).^2;
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%signal power is now only the "fluctuation"/ i.e. the ac part
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s = mean( abs(obj.signal-mean(obj.signal)).^2 );
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cspr = 10*log10(c / s);
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end
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end
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end
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