117 lines
3.1 KiB
Matlab
117 lines
3.1 KiB
Matlab
classdef Electricalsignal < Signal
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%ELECTRICALSIGNAL Summary of this class goes here
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% Detailed explanation goes here
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properties
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fs
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end
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methods
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function obj = Electricalsignal(signal, options)
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%ELECTRICALSIGNAL 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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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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function pow = power(obj)
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% Power of an electrical signal
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R = 50;
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pow = mean(abs(obj.signal).^2) / R; % Power in watts = V^2 / R
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pow = 10*log10(pow) + 30; % Power in dB +30 = dBm
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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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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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cspr =carrier_power_dbm-signal_power_dbm;
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end
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function obj = normalize(obj,options)
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arguments
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obj Electricalsignal
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options.mode normalization_mode = normalization_mode.rms
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end
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switch options.mode
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case normalization_mode.milliwatt
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curpow = sqrt(mean(obj.signal.^2)/50); %watt
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tgtpow = sqrt(1e-3); %watt -> wir wollen milliwatt
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scling = tgtpow/curpow;
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obj.signal = obj.signal*scling;
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case normalization_mode.rms
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obj.signal = obj.signal / sqrt(mean(obj.signal.^2));
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case normalization_mode.oneone
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obj.signal = obj.signal - min(obj.signal);
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obj.signal = obj.signal/max(abs(obj.signal));
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obj.signal = (2*obj.signal) - 1;
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end
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end
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function obj = setPower(obj,outputpower, mode)
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arguments
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obj Electricalsignal
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outputpower
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mode power_notation
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end
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switch mode
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case power_notation.W
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case power_notation.mW
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outputpower_w = outputpower/1000; %mW to Watt
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case power_notation.dBm
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outputpower_w = 10^((outputpower-30)/10); % dBm to Watt
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case power_notation.dBW
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outputpower_w = 10^((outputpower)/10); % dBm to Watt
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end
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curpow = sqrt(mean(obj.signal.^2)/50); %watt mit 50 ohm ref
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tgtpow = sqrt(outputpower_w); %watt -> wir wollen milliwatt
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scling = tgtpow/curpow;
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obj.signal = obj.signal*scling;
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end
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end
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end
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