56 lines
1.4 KiB
Matlab
56 lines
1.4 KiB
Matlab
function simulate_tx_sig(filename)
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%% Params
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M=4;
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digimod = PAMmapper(M,0);
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fdac = 120e9;
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fsym = 112e9;
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pulseform = Pulseformer("pulseform","rrc","fdac",fdac,"fsym",fsym,"pulselength",32,"rrcalpha",0.027);
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kover = 16;
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awg = AWG('fdac',fdac,'kover',kover,'lpf_active',1,'f_cutoff',56e9,'lpf_type',filtertypes.gaussian,'bit_resolution',5.5);
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%awg = M8199B();
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lp_laser = Filter('filtdegree',2,"f_cutoff",50e9,"fsamp",fdac*kover,"filterType",filtertypes.butterworth);
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%% PROCESS TX
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% 1) PRBS Generation
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O = 20; %order of prbs
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N = 2^(O-1); %length of prbs
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[~,seed] = prbs(O,1); %initialize first seed of prbs
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for i = 1:log2(M)
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[bitpattern(:,i),seed] = prbs(O,N,seed);
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end
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% 2 ) Build Inf. signal class
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bits = Informationsignal(bitpattern);
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% 3) Digi modulation -> PAM-M signal
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digimod_out = digimod.map(bits);
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% 4) Pulse shaping -> racos
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X = pulseform.process(digimod_out);
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% 5) AWG (lowpass, quantization, sample and hold)
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X = awg.process(X);
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% 6) Lowpass behavior before laser
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X = lp_laser.process(X);
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% 7) Normalize signal
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X = X.normalize("mode","oneone");
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X.signal = X.signal;
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spectrum_plot(X.signal',X.fs,'spectrum');
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if nargin == 1
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save(['C:\Users\Silas\Documents\MATLAB\imdd_simulation\projects\',char(filename)],'X');
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end
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end
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