folderpath = 'C:\Users\sioe\Documents\High_Speed_Measurement_2024\bias_testing\';
experiment_name = 'PAM4_b2b_';

ffe_only            = 0;
postfilter_approach = 1;
db_channel_approach = 0;
db_coding_approach  = 0;

db_precode = db_coding_approach || db_channel_approach;

%%% SIR Sweep for MPI Experiment %%%
params = struct;

params.vbias = [3];
params.awg_vpp = [2.7];

wh = DataStorage(params);

wh.addStorage("ber");
wh.addStorage("pd_in");
wh.addStorage("rop");
wh.addStorage("m");
wh.addStorage("signals");

precomp_path = "C:\Users\sioe\Documents\High_Speed_Measurement_2024\precomp\";
precomp_fn = "lab_high_speed";
precomp_mode = 2; %0=do nothing ; 1= measure; 2=precomp active
precomp_amp_max = 4;

M           = 4;
pn_key      = 2;
usemrds     = 0;
fsym        = 170e9;
fdac        = 256e9;
awg_vpp     = 0.35;
fadc        = 256e9;
rrcalpha    = 0.05;
v_bias      = 2.25;
pd_in_set   = 6;
rop_atten   = 0;

looptatal = prod(wh.dim);
disp(['Start Measurement of ',num2str(looptatal),' loops...'])
hWaitbar = waitbar(0, 'Starting measurement...', 'Name', 'Processing Progress');
loopcnt = 0;

for v_bias = wh.parameter.vbias.values
    for awg_vpp = wh.parameter.awg_vpp.values

        loopcnt = loopcnt+1;
        progressFraction = loopcnt / looptatal;
        waitbar(progressFraction, hWaitbar, ...
            sprintf('Progress: %d/%d', loopcnt, looptatal));

        loop_name = ['_fsym_',num2str(fsym)];

        %%%%% SET Voltages %%%%%%
        dcs = DC_supply("active",[1,0],"voltage",[v_bias, 0]);
        dcs.set("voltage",[v_bias, 0]);

        %%%%% SET Attenuator %%%%%%
        voa = OptAtten("active",[1,2,1,1],"value",[rop_atten,pd_in_set,0,0],"wavelength",[1310,1310,1310,1310]);
        voa.set('active',[1,2,1,1],'value',[rop_atten,pd_in_set,0,0]);
        % voa.readvals();

        %%%%% Construct AWG and Scope Modules %%%%%%
        SCP = ScopeKeysight("model","UXR1104B",'autoscale',0,"fadc","GSa_256","channel",[0,1,0,0],"recordLen",2000000,"removeDC",1);
        AWG = AwgKeysight("model","M8199B","fdac",fdac,"scaletodac",[1,1],"skews",[0,0],"voltages",[0,awg_vpp]);
        A2S = Awg2Scope(AWG,SCP,[0,2,0,0]);

        %%%%% Symbol Generation %%%%%%
        Pform       = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"rrcalpha",rrcalpha);

        [Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",1,...
            "fs_out",fdac,"applyclipping",0,"clipfactor",1.7,...
            "applypulseform",0,"pulseformer",Pform,"randkey",pn_key,...
            "db_precode",db_precode,...
            "mrds_code",usemrds,"mrds_blocklength",512,"db_encode",db_coding_approach).process();

        %%%%% Precompensation Routine %%%%%%
        if precomp_mode == 1 % measure channel
            precomp_est = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',fdac);
            Digi_sig = precomp_est.buildOFDM();
        elseif precomp_mode == 2 % apply precomp
            precomp_est = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',Digi_sig.fs);
            Digi_sig = precomp_est.precomp(Digi_sig,'maxampdb',precomp_amp_max,'loadPath',precomp_path,'fileName',precomp_fn);
        end

        %%%%% Resample to DAC rate %%%%%%
        Digi_sig = Digi_sig.resample("fs_out",AWG.fdac);


        %%%%% Plot and Save Routine 1 %%%%%%%%%%%%%%%%%%%%%%%%%
        % Digi_sig.spectrum("displayname","Normal Tx","fignum",10);

        % save([folderpath,[experiment_name,'bits'],loop_name],"Bits");
        % save([folderpath,[experiment_name,'symbols'],loop_name],"Symbols");
        %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

        %%%%% AWG --> Scope %%%%%%
        [~,Scpe_sig,~,D] = A2S.process("signal2",Digi_sig);

        %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
        % Scpe_sig.spectrum("displayname","Scope PSD","fignum",20);

        % Scpe_sig.plot("displayname","Scope raw signal","fignum",25);
        %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


        %%%%%% Sample to 2x fsym %%%%%%
        Scpe_sig = Scpe_sig.resample("fs_in",fadc,"fs_out",2*fsym);

        %%%%% Precompensation Routine %%%%%%
        if precomp_mode == 1
            precomp_est.estimate(Scpe_sig,"save",true,"savePath",precomp_path,"fileName",precomp_fn);
            precomp_est.plot();
        end

        voa.readvals();
        rop = voa.power_state(1);
        pd_in = voa.power_state(2);
        disp(['ROP: ',num2str(rop),' dBm || PD in: ',num2str(pd_in), ' dBm']);

        %%%%%% Sync Rx signal with reference %%%%%%
        [Scpe_sig,S] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym);

        %%%%%% SNR CHEAT - Avg. the measured signal occurences %%%%%%
        average_signals = 0;
        if average_signals
            scope_mean = zeros(size(S{1}.signal));
            for n=1:numel(S)
                scope_mean = scope_mean + S{n}.signal;
            end
            scope_mean = scope_mean ./ n;
            Scpe_sig.signal = scope_mean;
        end

        %%%%% Plot and Save Routine 2 %%%%%%%%%%%%%%%%%%%%%%%%%
        save([folderpath,experiment_name,'rx_signal',loop_name],"S");
        Scpe_sig.eye(fsym,M,"fignum",40,"displayname",' after Scope');

        voa.readvals();
        rop = voa.power_state(1);
        pd_in = voa.power_state(2);

        %%%%% EQUALIZE %%%%%%
        Eq = FFE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",50,"sps",2,"decide",0);
        % Eq = VNLE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",[0.0004 0.0005 0.0006],"mu_tr",0,"order",[50,7,7],"sps",2,"decide",1);
        % Eq = EQ("Ne",[50,7,7],"Nb",[0,0,0],"training_length",4096*2,"training_loops",5,"dd_loops",5,"K",2,"DCmu",0.05,"DDmu",[0.0004 0.0004 0.0004 0.0004 ],"DFEmu",0.005,"FFEmu",0,"plotfinal",0,"ideal_dfe",1);

        if ffe_only %%%%%%%%%%%%%%%%%%%%%%%%%%%

            [EQ_sig] = Eq.process(Scpe_sig,Symbols);

            EQ_sig.plot("fignum",50,"displayname",'After EQ');

            Rx_bits = PAMmapper(M,0).demap(EQ_sig);

            [~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);

            disp(['FFE: ',sprintf('%.1E',ber),'| ROP: ',num2str(rop),' dB | PD_in: ',num2str(pd_in),' dBm']);

            if 1
                figure(53);
                constellation = unique(Symbols.signal);
                received = NaN(numel(constellation),length(Symbols));
                for lvl = 1:numel(constellation)
                    received(lvl,Symbols.signal==constellation(lvl)) = EQ_sig.signal(Symbols.signal==constellation(lvl));
                    hold on
                    histogram(received(lvl,:),1000,"EdgeAlpha",0);
                end
            end

        elseif postfilter_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%

            [EQ_sig] = Eq.process(Scpe_sig,Symbols);

            EQ_sig.plot("fignum",50,"displayname",'After EQ','clear',1);

            Noi = EQ_sig-Symbols;

            Rx_bits = PAMmapper(M,0).demap(EQ_sig);

            [~,errors_bm,ber_ffe_only,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);

            nc = 3;
            burg_coeff = arburg(Noi.signal,nc);

            EQ_sig = EQ_sig.filter(burg_coeff,1);

            if 0
                Noi.spectrum('displayname','Noise PSD','fignum',123)
                [h,w] = freqz(1,burg_coeff,length(Noi),"whole",Noi.fs);
                h = h/max(abs(h));
                hold on
                w_ = (w - Noi.fs/2);
                plot(w_.*1e-9,20*log10(fftshift(h)),'DisplayName',['', num2str(nc), ' coefficients for burg alg.']);
            end

            EQ_sig = MLSE("DIR",burg_coeff,"duobinary_output",0,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);

            Rx_bits = PAMmapper(M,0).demap(EQ_sig);

            [~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);

            disp(['FFE: ',sprintf('%.1E',ber_ffe_only),' -> PF -> MLSE: ',sprintf('%.1E',ber),'  dB | PD_in: ',num2str(pd_in),' dBm']);

        elseif db_channel_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%

            [EQ_sig, Noi] = Eq.process(Scpe_sig,Duobinary().encode(Symbols));

            EQ_sig.plot("fignum",50,"displayname",'After EQ','clear',1);

            EQ_sig = MLSE("DIR",[1,1],"duobinary_output",1,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
            
            EQ_sig = Duobinary().decode(EQ_sig);

            Rx_bits = PAMmapper(M,0).demap(EQ_sig);
            [~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);

            disp([' DB Precode -> Channel -> FFE -> Decode/ Mod  ',sprintf('%.1E',ber),' | PD_in: ',num2str(pd_in),' dBm']);

        elseif db_coding_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%

            [EQ_sig, Noi] = Eq.process(Scpe_sig,Symbols);
            EQ_sig = MLSE("DIR",[1,1],"duobinary_output",1,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
            EQ_sig = Duobinary().decode(EQ_sig);

            Rx_bits = PAMmapper(M,0).demap(EQ_sig);
            [~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);

            EQ_sig.plot("fignum",50,"displayname",'After EQ');

            disp([' DB Precode -> DB Code -> Channel -> FFE -> Decode/ Mod  ',sprintf('%.1E',ber),' | PD_in: ',num2str(pd_in),' dBm']);

        end


        wh.addValueToStorage(ber,'ber',v_bias,awg_vpp);
        wh.addValueToStorage(rop,'rop',v_bias,awg_vpp);
        wh.addValueToStorage(pd_in,'pd_in',v_bias,awg_vpp);
        wh.addValueToStorage(Rx_bits,'signals',v_bias,awg_vpp);
        wh.addValueToStorage(M,'m',v_bias,awg_vpp);

        showCurrentMeasurement('BER', ber, 'ROP', rop, 'PD in', pd_in, 'PAM',M, 'Vbias', v_bias, 'AWG Vpp', awg_vpp, 'Precomp MaxAmp',precomp_amp_max);
        autoArrangeFigures(3,3,2);


    end
end

close(hWaitbar);

wh.save([folderpath,experiment_name,'_wh']);

autoArrangeFigures(3,3,2)