halfway merged and pulled?!

2025-12-15 15:41:02 +01:00
parent 7d0a634b87
commit b8cecae895
145 changed files with 19835 additions and 0 deletions
--- a/projects/ML_based_MLSE/standard_link_model.m
+++ b/projects/ML_based_MLSE/standard_link_model.m
@@ -0,0 +1,99 @@
+function [Rx_sig_2sps,Symbols,Tx_bits] = standard_link_model(options)
+
+    % STANDARD_LINK_MODEL  Basic IM/DD link simulation
+    %   Rx_sig_2sps = standard_link_model(...optional args...)
+    %
+    %   All arguments are optional and default to standard parameters
+    %   if not provided.
+    
+    arguments
+
+        % --- Transmitter settings ---
+        options.M                   (1,1) double   = 4
+        options.apply_pulsef         (1,1) logical  = true
+        options.fdac                 (1,1) double   = 256e9
+        options.fadc                 (1,1) double   = 256e9
+        options.random_key           (1,1) double   = 2
+        options.rcalpha              (1,1) double   = 0.05
+        options.kover                (1,1) double   = 8
+        options.vbias_rel            (1,1) double   = 0.5
+        options.u_pi                 (1,1) double   = 3.2
+        options.laser_wavelength     (1,1) double   = 1310
+        options.laser_linewidth      (1,1) double   = 1e6
+
+        % --- Channel parameters ---
+        options.link_length_km        (1,1) double   = 0
+        options.rop                  (1,:) double   = -5
+        options.fsym                 (1,:) double   = (212:16:256)*1e9
+        options.doub_mode            (1,1) db_mode  = db_mode.no_db
+
+        % --- Debug ---
+        options.debug                (1,1) logical  = false
+
+    end
+    
+    % --- Pulse former ---
+    Pform = Pulseformer("fsym",options.fsym,"fdac",4*options.fsym, ...
+        "pulse","rc","pulselength",16,"alpha",options.rcalpha);
+    
+    % --- Transmitter source ---
+    [Digi_sig,Symbols,Tx_bits] = PAMsource( ...
+        "fsym",options.fsym,"M",options.M,"order",18,"useprbs",0, ...
+        "fs_out",options.fdac,"applyclipping",0,"clipfactor",1.5, ...
+        "applypulseform",options.apply_pulsef,"pulseformer",Pform, ...
+        "randkey",options.random_key,"db_precode",0,"db_encode",0, ...
+        "mrds_code",0,"mrds_blocklength",512, ...
+        "duobinary_mode",options.doub_mode).process();
+    
+    % --- AWG driver ---
+    El_sig = M8199B("kover",options.kover).process(Digi_sig);
+    El_sig = El_sig.normalize("mode","oneone");
+    
+    % --- E/O Modulation ---
+    vbias = -options.vbias_rel*options.u_pi;
+    Opt_sig = EML("mode",eml_mode.im_cosinus,"power",3, ...
+        "fsimu",El_sig.fs,"lambda",options.laser_wavelength, ...
+        "bias",vbias,"u_pi",options.u_pi,"linewidth",options.laser_linewidth, ...
+        "randomkey",options.random_key+1).process(El_sig);
+    
+    % --- Fiber ---
+    Opt_sig = Fiber("fsimu",Opt_sig.fs,"fiber_length",options.link_length_km, ...
+        "alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig);
+    
+    % --- Amplifier (ROP set) ---
+    Opt_sig = Amplifier("amp_mode","ideal_no_noise", ...
+        "gain_mode","output_power","amplification_db",options.rop).process(Opt_sig);
+    
+    % --- Photodiode ---
+    PD_sig = Photodiode("fsimu",options.fdac*options.kover,"dark_current",2e-8, ...
+        "responsivity",1,"temperature",20,"nep",1.8e-11, ...
+        "randomkey",options.random_key).process(Opt_sig);
+    
+    % --- Electrical LPF (receiver frontend) ---
+    rx_bwl = 70e9;
+    PD_sig = Filter('filtdegree',4,"f_cutoff",rx_bwl, ...
+        "fs",options.fdac*options.kover,"filterType",filtertypes.butterworth, ...
+        "active",true).process(PD_sig);
+    
+    % --- Scope low-pass and sampling ---
+    Lp_scpe = Filter('filtdegree',4,"f_cutoff",110e9,"fs",options.fadc, ...
+        "filterType",filtertypes.butterworth,"active",true);
+    
+    Scpe_sig = Scope("fsimu",options.fdac*options.kover,"fadc",options.fadc, ...
+        "delay",0,"fixed_delay",0,"filtertype",filtertypes.butterworth, ...
+        "samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0, ...
+        "samp_jitter",0,"adcresolution",8,"quantbuffer",0.1, ...
+        'block_dc',1,'lpf_active',1,'H_lpf',Lp_scpe).process(PD_sig);
+    
+    % --- Downsample to 2 sps ---
+    Scpe_sig_2sps = Scpe_sig.resample("fs_out",2*options.fsym);
+    [~,Scpe_cell,~,found_sync] = Scpe_sig_2sps.tsynch( ...
+        "reference",Symbols,"fs_ref",options.fsym,"debug_plots",0);
+
+    try
+        Rx_sig_2sps = Scpe_cell{1}.normalize("mode","rms");
+    catch
+        Rx_sig_2sps = Scpe_sig_2sps.normalize("mode","rms");
+    end
+
+end