Gif stuff
nonlinear MLSE investigation trying hard to implment ML-based pre Equalization to find the branch metrics
This commit is contained in:
Silas Oettinghaus
@@ -47,16 +47,17 @@ doub_mode = db_mode.no_db;
|
||||
cols = linspecer(6);
|
||||
rop = [-6];
|
||||
bwl = [0.5:0.1:1.5];
|
||||
fsym = [120:8:256].*1e9;
|
||||
fsym =210e9;
|
||||
fsym = [192:16:256].*1e9;
|
||||
fsym = 208e9;
|
||||
|
||||
ber_vnle = [];
|
||||
ber_vnle = [];
|
||||
ber_mlse = [];
|
||||
ber_mlse_burg = [];
|
||||
ber_viterbi = [];
|
||||
ber_db = [];
|
||||
ber_db_diff_precoded = [];
|
||||
gmi_vnle_bitwise = [];
|
||||
gmi_mlse = [];
|
||||
gmi_mlse = [];
|
||||
gmi_mlse_db = [];
|
||||
|
||||
for r = 1:length(fsym)
|
||||
@@ -69,16 +70,16 @@ for r = 1:length(fsym)
|
||||
apply_pulsef = 1;
|
||||
|
||||
[Digi_sig,Symbols,Tx_bits] = PAMsource(...
|
||||
"fsym",fsym(r),"M",M,"order",18,"useprbs",0,...
|
||||
"fsym",fsym(r),"M",M,"order",19,"useprbs",0,...
|
||||
"fs_out",fdac,...
|
||||
"applyclipping",0,"clipfactor",1.5,...
|
||||
"applypulseform",apply_pulsef,"pulseformer",Pform,...
|
||||
"randkey",random_key,...
|
||||
"db_precode",db_precode,"db_encode",db_encode,...
|
||||
"mrds_code",0,"mrds_blocklength",512,"duobinary_mode",duob_mode).process();
|
||||
|
||||
|
||||
% El_sig = AWG("fdac",fdac,"f_cutoff",fsym(r),"lpf_active",0,"kover",kover,"bit_resolution",12,"upsampling_method","samplehold","precomp_sinc_rolloff",0).process(Digi_sig);
|
||||
El_sig = M8199B("kover",kover).process(Digi_sig);
|
||||
El_sig = M8199B("kover",kover).process(Digi_sig);
|
||||
% AWG("fdac",fdac,"f_cutoff",fsym(r),"lpf_active",0,"kover",kover,"bit_resolution",12,"upsampling_method","samplehold","precomp_sinc_rolloff",0).process(Digi_sig);
|
||||
|
||||
%%%%% Low-pass el. components %%%%%%
|
||||
@@ -95,15 +96,17 @@ for r = 1:length(fsym)
|
||||
vbias = -u_pi*0.5;
|
||||
[Opt_sig] = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",El_sig.fs,"lambda",laser_wavelength,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth,"randomkey",random_key+1).process(El_sig);
|
||||
|
||||
figure(15);
|
||||
hold on
|
||||
scatter(El_sig.signal(1:100000)+vbias,(abs(Opt_sig.signal(1:100000)).^2)*1e3,0.1,'.','DisplayName','Modulator TF')
|
||||
xlabel('Input in V')
|
||||
ylabel('abs(Eopt)2 in mW','Interpreter','latex')
|
||||
ylim([0 2]);
|
||||
xlim([-3.2 0]);
|
||||
|
||||
Opt_sig.eye(fsym(r),M,"fignum",103837);
|
||||
if 0
|
||||
figure(15);
|
||||
hold on
|
||||
scatter(El_sig.signal(1:100000)+vbias,(abs(Opt_sig.signal(1:100000)).^2)*1e3,0.1,'.','DisplayName','Modulator TF')
|
||||
xlabel('Input in V')
|
||||
ylabel('abs(Eopt)2 in mW','Interpreter','latex')
|
||||
ylim([0 2]);
|
||||
xlim([-3.2 0]);
|
||||
|
||||
Opt_sig.eye(fsym(r),M,"fignum",103837);
|
||||
end
|
||||
|
||||
%%%%%% Fiber %%%%%%
|
||||
Opt_sig = Fiber("fsimu",Opt_sig.fs,"fiber_length",link_length/1000,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig);
|
||||
@@ -113,50 +116,50 @@ for r = 1:length(fsym)
|
||||
|
||||
% Opt_sig.eye(fsym(r),M,"fignum",103838);
|
||||
|
||||
% % Opt_sig.signal = Opt_sig.signal + 5*abs(mean(Opt_sig.signal));
|
||||
% % Opt_sig.signal = Opt_sig.signal + 5*abs(mean(Opt_sig.signal));
|
||||
% Opt_sig.move_it_spectrum("displayname",'Opt Sig after Amp','fignum',1223323);
|
||||
% Pc = abs(mean(Opt_sig.signal)).^2; % carrier power
|
||||
% Ptot = mean(abs(Opt_sig.signal).^2); % total power
|
||||
% Ps = max(Ptot - Pc, eps);
|
||||
% Ps = max(Ptot - Pc, eps);
|
||||
% Pcdb = 10*log10(Pc);
|
||||
% Psdb = 10*log10(Ps);
|
||||
%
|
||||
%
|
||||
% cspr_dB = 10*log10(Pc / Ps);
|
||||
%
|
||||
%
|
||||
% % Minimal in-place CSPR set (real, nonnegative field constraint)
|
||||
% E = Opt_sig.signal; % real field samples
|
||||
% target_cspr_dB = 20; % <-- set your target CSPR (dB)
|
||||
%
|
||||
%
|
||||
% % Decompose into DC + zero-mean waveform
|
||||
% m = mean(E);
|
||||
% x0 = E - m; % zero-mean modulation
|
||||
% Ps0 = mean(x0.^2); % sideband power (fixed if shape kept)
|
||||
%
|
||||
%
|
||||
% % Current CSPR (for reference)
|
||||
% Pc_cur = m^2;
|
||||
% Ptot_cur = mean(E.^2);
|
||||
% Ps_cur = max(Ptot_cur - Pc_cur, eps);
|
||||
% cspr_in = 10*log10(Pc_cur / Ps_cur);
|
||||
%
|
||||
%
|
||||
% % Bias needed for target CSPR, and minimal bias to keep E>=0
|
||||
% R_tgt = 10^(target_cspr_dB/10); % Pc/Ps
|
||||
% a_req = sqrt(R_tgt * Ps0); % required DC bias
|
||||
% a_min = -min(x0); % to avoid negatives everywhere
|
||||
% a = max(a_req, a_min); % if infeasible, lands at CSPR_min
|
||||
%
|
||||
%
|
||||
% % Apply bias (preserves waveform shape)
|
||||
% E_new = a + x0;
|
||||
%
|
||||
%
|
||||
% % Achieved CSPR
|
||||
% Pc_new = mean(E_new)^2;
|
||||
% Ptot_new = mean(E_new.^2);
|
||||
% Ps_new = max(Ptot_new - Pc_new, eps);
|
||||
% cspr_out = 10*log10(Pc_new / Ps_new);
|
||||
%
|
||||
%
|
||||
% % (Optional) show feasibility info
|
||||
% cspr_min = 10*log10((a_min^2)/max(Ps0,eps));
|
||||
% disp(table(cspr_in, target_cspr_dB, cspr_min, cspr_out));
|
||||
%
|
||||
%
|
||||
% % Use E_new as your adjusted field
|
||||
% Opt_sig.signal = E_new;
|
||||
|
||||
@@ -166,57 +169,56 @@ for r = 1:length(fsym)
|
||||
%%%%%% Low-pass RX (PD, El. Connectors and Scope %%%%%%
|
||||
rx_bwl = 70e9;
|
||||
PD_sig = Filter('filtdegree',4,"f_cutoff",rx_bwl,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(PD_sig);
|
||||
|
||||
|
||||
% %%%%%% Low-pass Scope %%%%%%
|
||||
Lp_scpe = Filter('filtdegree',4,"f_cutoff",110e9,"fs",fadc,"filterType",filtertypes.butterworth,"active",true);
|
||||
|
||||
|
||||
%%%%%% Scope %%%%%%
|
||||
Scpe_sig = Scope("fsimu",fdac*kover,"fadc",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);
|
||||
|
||||
|
||||
Scpe_sig_2sps = Scpe_sig.resample("fs_out",2*fsym(r));
|
||||
% Scpe_sig_resampled.signal = Scpe_sig_resampled.signal(1:2*length(Symbols));
|
||||
|
||||
|
||||
[~, Scpe_cell, ~, found_sync] = Scpe_sig_2sps.tsynch("reference", Symbols, "fs_ref", fsym(r), "debug_plots", 0);
|
||||
Rx_sig = Scpe_cell{1};
|
||||
Rx_sig = Rx_sig.normalize("mode","rms");
|
||||
|
||||
if 0
|
||||
if 1
|
||||
%Duobinary Targeting
|
||||
|
||||
eq_ = EQ("Ne",[vnle_order1,vnle_order2,vnle_order3],"Nb",[dfe_order],"training_length",len_tr,"training_loops",5,"dd_loops",5,"K",2,"DCmu",mu_dc,"DDmu",[mu_ffe mu_dfe],"DFEmu",0.005,"FFEmu",0,"plotfinal",0,"ideal_dfe",1);
|
||||
|
||||
|
||||
db_ref_sequence = Duobinary().encode(Symbols);
|
||||
db_ref_constellation = unique(db_ref_sequence.signal);
|
||||
[eq_signal, eq_noise] = eq_.process(Rx_sig,db_ref_sequence);
|
||||
|
||||
|
||||
viterbi = 0;
|
||||
if viterbi
|
||||
if viterbi
|
||||
mlse_ = MLSE_viterbi("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).levels);
|
||||
mlse_.DIR = [1,1];
|
||||
[mlse_sig_sd] = mlse_.process(eq_signal);
|
||||
[eq_signal_whitened] = mlse_.process(eq_signal);
|
||||
else
|
||||
mlse_ = MLSE("DIR",[1,1],"duobinary_output",0,"M",M,"trellis_states",PAMmapper(M,0).get_levels ./ PAMmapper(M,0).get_scaling);
|
||||
mlse_.DIR = [1,1];
|
||||
[mlse_sig_sd,LLR,gmi_mlse_db(r)] = mlse_.process(eq_signal,Symbols);
|
||||
[eq_signal_whitened,LLR,gmi_mlse_db(r)] = mlse_.process(eq_signal,Symbols);
|
||||
end
|
||||
|
||||
mlse_sig_hd = PAMmapper(M,0,"eth_style",0).quantize(mlse_sig_sd);
|
||||
|
||||
mlse_sig_hd = PAMmapper(M,0,"eth_style",0).quantize(eq_signal_whitened);
|
||||
mlse_sig_hd_precoded = Duobinary().encode(mlse_sig_hd,"M",M);
|
||||
mlse_sig_hd_precoded = Duobinary().decode(mlse_sig_hd_precoded,"M",M);
|
||||
|
||||
|
||||
tx_symbols_precoded = Duobinary().encode(Symbols);
|
||||
tx_symbols_precoded = Duobinary().decode(tx_symbols_precoded);
|
||||
|
||||
|
||||
tx_bits_precoded = PAMmapper(M,0,"eth_style",0).demap(tx_symbols_precoded);
|
||||
|
||||
|
||||
rx_bits_mlse = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd_precoded);
|
||||
[~,errors_db_diff_precoded,ber_db_diff_precoded(r),a] = calc_ber(rx_bits_mlse.signal,tx_bits_precoded.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
burst_db_pre(r,:) = count_error_bursts(a, 15)./numel(Tx_bits.signal);
|
||||
|
||||
|
||||
%B) Just determine BER
|
||||
rx_bits_mlse = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd);
|
||||
[bits_mlse,errors_db,ber_db(r),a] = calc_ber(rx_bits_mlse.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
@@ -225,39 +227,37 @@ for r = 1:length(fsym)
|
||||
fprintf('BER ber_db_diff_precoded: %.2e \n',ber_db_diff_precoded(r));
|
||||
fprintf('BER Vber_dbNLE: %.2e \n',ber_db(r));
|
||||
% figure();hold on;stem(1:15,burst_db(r,:),'LineWidth',1,'Color',cols(1,:));stem(1:15,burst_db_pre(r,:),'LineWidth',1,'Color',cols(2,:));set(gca, 'yscale', 'log');
|
||||
|
||||
|
||||
end
|
||||
|
||||
|
||||
% FFE or VNLE
|
||||
eq_ = EQ("Ne",[vnle_order1,vnle_order2,vnle_order3],"Nb",[0,0,0],"training_length",len_tr,"training_loops",5,"dd_loops",5,"K",2,"DCmu",mu_dc,"DDmu",[mu_ffe mu_dfe],"DFEmu",0.00,"FFEmu",0,"plotfinal",0,"ideal_dfe",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",[50,2,2],"sps",2,"decide",0);
|
||||
|
||||
[eq_signal_sd, eq_noise] = eq_.process(Rx_sig, Symbols);
|
||||
|
||||
[eq_signal_fullresp, eq_noise] = eq_.process(Rx_sig, Symbols);
|
||||
showEQNoisePSD(eq_noise, "fignum",1273876,"displayname",'noise after EQ');
|
||||
[mi_gomez(r)] = calc_air(eq_signal_sd, Symbols, "skip_front", 100, "skip_end", 100);
|
||||
[gmi_vnle_bitwise(r)] = calc_ngmi(eq_signal_sd,Symbols);
|
||||
[gmi_bitwise_2(r)] = calc_gmi_bitwise(eq_signal_sd,Symbols);
|
||||
snr_vnle(r) = calc_snr(Symbols, eq_signal_sd-Symbols);
|
||||
|
||||
eq_signal_sd.plot("displayname",'bla','fignum',199);
|
||||
eq_signal_sd.eye(fsym(r),M,"fignum",103837);
|
||||
|
||||
[mi_gomez(r)] = calc_air(eq_signal_fullresp, Symbols, "skip_front", 100, "skip_end", 100);
|
||||
[gmi_vnle_bitwise(r)] = calc_ngmi(eq_signal_fullresp,Symbols);
|
||||
[gmi_bitwise_2(r)] = calc_gmi_bitwise(eq_signal_fullresp,Symbols);
|
||||
snr_vnle(r) = calc_snr(Symbols, eq_signal_fullresp-Symbols);
|
||||
|
||||
% eq_signal_fullresp.plot("displayname",'bla','fignum',199);
|
||||
% eq_signal_fullresp.eye(fsym(r),M,"fignum",103837);
|
||||
|
||||
% Hard decision on VNLE output
|
||||
eq_signal_hd = PAMmapper(M, 0).quantize(eq_signal_sd);
|
||||
eq_signal_hd = PAMmapper(M, 0).quantize(eq_signal_fullresp);
|
||||
rx_bits = PAMmapper(M,0,"eth_style",0).demap(eq_signal_hd);
|
||||
[~,tot_err,ber_vnle(r),a] = calc_ber(rx_bits.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
burst_vnle(r,:) = count_error_bursts(a, 10)./tot_err;
|
||||
|
||||
showLevelConfusionMatrix(eq_signal_hd,Symbols,"M",M,"fignum",200,"displayname",'bla');
|
||||
showLevelScatter(eq_signal_sd,Symbols,"displayname",'VNLE Out','f_sym',fsym(r),'fignum',201);
|
||||
show2Dconstellation(eq_signal_sd,Symbols,"displayname",'VNLE Out','fignum',2241);
|
||||
|
||||
% showLevelConfusionMatrix(eq_signal_hd,Symbols,"M",M,"fignum",200,"displayname",'bla');
|
||||
% showLevelScatter(eq_signal_fullresp,Symbols,"displayname",'VNLE Out','f_sym',fsym(r),'fignum',201);
|
||||
% show2Dconstellation(eq_signal_fullresp,Symbols,"displayname",'VNLE Out','fignum',2241);
|
||||
|
||||
fprintf('BER VNLE: %.2e \n',ber_vnle(r));
|
||||
fprintf('NGMI VNLE: %.2f \n',gmi_vnle_bitwise(r)./m);
|
||||
|
||||
|
||||
if 1
|
||||
|
||||
% Process through postfilter and MLSE
|
||||
@@ -268,45 +268,133 @@ for r = 1:length(fsym)
|
||||
pf_ = Postfilter("ncoeff",pf_ncoeffs,"useBurg",1,"coefficients",[1,0.85]);
|
||||
end
|
||||
|
||||
mlse_ = MLSE("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).get_levels ./ PAMmapper(M,0).get_scaling);
|
||||
[mlse_sig_sd,whitened_noise] = pf_.process(eq_signal_sd, eq_noise);
|
||||
|
||||
mlse_.DIR = pf_.coefficients;
|
||||
% showEQNoisePSD(eq_noise,"postfilter_taps",pf_.coefficients,"displayname",'Postfilter Burg based');
|
||||
alpha(r) = pf_.coefficients(2);
|
||||
[signalclass_hd,LLR,gmi_mlse(r)] = mlse_.process(mlse_sig_sd,Symbols);
|
||||
mlse_sig_hd = PAMmapper(M, 0, "eth_style", 0).quantize(signalclass_hd);
|
||||
rx_bits = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd);
|
||||
alpha_vec = max(0,round(alpha(r),2)-0.2):0.025:round(alpha(r),2)+0.4;
|
||||
alpha_vec = unique(sort([alpha_vec, 1, alpha(r)]));
|
||||
|
||||
[~,tot_err,ber_mlse(r),a] = calc_ber(rx_bits.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
burst_mlse(r,:) = count_error_bursts(a, 10);
|
||||
gmi_mlse_ = zeros(size(alpha_vec));
|
||||
ber_mlse_ = zeros(size(alpha_vec));
|
||||
parfor a=1:numel(alpha_vec)
|
||||
|
||||
showLevelConfusionMatrix(mlse_sig_hd,Symbols,"M",M,"fignum",300,"displayname",'bla');
|
||||
mlse_ = MLSE("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).get_levels ./ PAMmapper(M,0).get_scaling,'DIR',[1,alpha_vec(a)]);
|
||||
|
||||
fprintf('BER MLSE: %.2e \n',ber_mlse(r));
|
||||
fprintf('NGMI MLSE: %.5f \n',gmi_mlse(r)./m);
|
||||
pf_ = Postfilter("ncoeff",1,"useBurg",0,"coefficients",[1,alpha_vec(a)]);
|
||||
[eq_signal_whitened,whitened_noise] = pf_.process(eq_signal_fullresp, eq_noise);
|
||||
|
||||
[signalclass_hd,LLR,gmi_mlse_(a)] = mlse_.process(eq_signal_whitened,Symbols);
|
||||
|
||||
levels = sort(unique(Symbols.signal(:)).'); % 1×6
|
||||
pairs = reshape(mlse_sig_hd.signal,2,[]).';
|
||||
isedge = ismember(pairs, [levels(1) levels(end)]);
|
||||
isforbidden = sum(isedge,2)==2;
|
||||
fprintf('Found %d forbidden transitions (even→odd edges).\n', nnz(isforbidden));
|
||||
mlse_sig_hd = PAMmapper(M, 0, "eth_style", 0).quantize(signalclass_hd);
|
||||
|
||||
rx_bits = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd);
|
||||
|
||||
[~,tot_err,ber_mlse_(a),errpos] = calc_ber(rx_bits.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
% burst_mlse(r,:) = count_error_bursts(errpos, 10);
|
||||
|
||||
% if 0
|
||||
% fprintf('BER MLSE: %.2e \n',ber_mlse(r));
|
||||
% fprintf('NGMI MLSE: %.5f \n',gmi_mlse(r)./m);
|
||||
%
|
||||
% showLevelConfusionMatrix(mlse_sig_hd,Symbols,"M",M,"fignum",300,"displayname",'bla');
|
||||
%
|
||||
% levels = sort(unique(Symbols.signal(:)).'); % 1×6
|
||||
% pairs = reshape(mlse_sig_hd.signal,2,[]).';
|
||||
% isedge = ismember(pairs, [levels(1) levels(end)]);
|
||||
% isforbidden = sum(isedge,2)==2;
|
||||
% fprintf('Found %d forbidden transitions (even→odd edges).\n', nnz(isforbidden));
|
||||
%
|
||||
%
|
||||
% % Process through postfilter and MLSE
|
||||
% pf_ncoeffs = 1;
|
||||
% pf_ = Postfilter("ncoeff",pf_ncoeffs,"useBurg",1);
|
||||
% mlse_ = MLSE_viterbi("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).levels);
|
||||
% [eq_signal_whitened,whitened_noise] = pf_.process(eq_signal_fullresp, eq_noise);
|
||||
% mlse_.DIR = pf_.coefficients;
|
||||
% mlse_output = mlse_.process(eq_signal_whitened);
|
||||
% mlse_sig_hd = PAMmapper(M, 0, "eth_style", 0).quantize(mlse_output);
|
||||
% rx_bits = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd);
|
||||
% [~,~,ber_viterbi(r),~] = calc_ber(rx_bits.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
% fprintf('Viterbi BER: %.2e \n',ber_viterbi(r));
|
||||
% end
|
||||
end
|
||||
|
||||
[ber_mlse(r),idx] = min(ber_mlse_);
|
||||
gmi_mlse(r) = gmi_mlse_(idx);
|
||||
ber_mlse_burg(r) = ber_mlse_(alpha_vec==alpha(r));
|
||||
best_alpha(r) = alpha_vec(idx);
|
||||
|
||||
end
|
||||
|
||||
% IR target in EQ
|
||||
if 1
|
||||
|
||||
% alpha_vec = max(0,round(alpha(r),2)-0.1):0.01:min(1,round(alpha(r),2)+0.1);
|
||||
plot_stuff = 0;
|
||||
gmi_mlse_pr_tgt_ = zeros(size(alpha_vec));
|
||||
ber_mlse_pr_tgt_ = zeros(size(alpha_vec));
|
||||
parfor a = 1:numel(alpha_vec)
|
||||
|
||||
eq_ = EQ("Ne",[vnle_order1,vnle_order2,vnle_order3],"Nb",[0,0,0],"training_length",len_tr,"training_loops",5,"dd_loops",5,"K",2,"DCmu",mu_dc,"DDmu",[mu_ffe mu_dfe],"DFEmu",0.00,"FFEmu",0,"plotfinal",0,"ideal_dfe",0);
|
||||
Symbols_filt = Symbols.filter([1,alpha_vec(a)],1);
|
||||
[eq_signal_prtgt, eq_noise] = eq_.process(Rx_sig, Symbols_filt);
|
||||
|
||||
|
||||
% Process through postfilter and MLSE
|
||||
pf_ncoeffs = 1;
|
||||
pf_ = Postfilter("ncoeff",pf_ncoeffs,"useBurg",1);
|
||||
mlse_ = MLSE_viterbi("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).levels);
|
||||
[mlse_sig_sd,whitened_noise] = pf_.process(eq_signal_sd, eq_noise);
|
||||
mlse_.DIR = pf_.coefficients;
|
||||
mlse_sig_sd = mlse_.process(mlse_sig_sd);
|
||||
mlse_sig_hd = PAMmapper(M, 0, "eth_style", 0).quantize(mlse_sig_sd);
|
||||
rx_bits = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd);
|
||||
[~,~,ber_viterbi(r),~] = calc_ber(rx_bits.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
fprintf('Viterbi BER: %.2e \n',ber_viterbi(r));
|
||||
if plot_stuff
|
||||
% Plot the response for respective EQ targets
|
||||
Symbols_filt.spectrum("displayname",'IDEAL Filtered Reference','fignum',240587);
|
||||
eq_signal_whitened.spectrum("displayname",'Full tgt. EQ + PF','fignum',240587);
|
||||
eq_signal_prtgt.spectrum("displayname",'Partial Resp. Target EQ','fignum',240587);
|
||||
|
||||
noise_pf_out = Symbols_filt-eq_signal_whitened;
|
||||
noise_pr_tgt = Symbols_filt-eq_signal_prtgt;
|
||||
|
||||
noise_pf_out.spectrum("displayname",'Ideal PR - Whitening Out','fignum',240588);
|
||||
noise_pr_tgt.spectrum("displayname",'Ideal PR - PR Target Out','fignum',240588);
|
||||
end
|
||||
|
||||
mlse_ = MLSE("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).get_levels ./ PAMmapper(M,0).get_scaling,'DIR',[1,alpha_vec(a)],'debug',0);
|
||||
|
||||
[signalclass_hd,LLR,gmi_mlse_pr_tgt_(a)] = mlse_.process(eq_signal_prtgt,Symbols);
|
||||
|
||||
mlse_sig_hd = PAMmapper(M, 0, "eth_style", 0).quantize(signalclass_hd);
|
||||
|
||||
rx_bits = PAMmapper(M,0,"eth_style",0).demap(mlse_sig_hd);
|
||||
|
||||
[~,tot_err,ber_mlse_pr_tgt_(a),errpos] = calc_ber(rx_bits.signal,Tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
|
||||
|
||||
% burst_mlse_(a,:) = count_error_bursts(errpos, 10);
|
||||
|
||||
% fprintf('BER MLSE: %.2e \n',ber_mlse_pr_tgt_(a));
|
||||
% fprintf('NGMI MLSE: %.5f \n',gmi_mlse_pr_tgt_(a)./m);
|
||||
|
||||
end
|
||||
|
||||
[ber_mlse_pr_tgt(r),idx] = min(ber_mlse_pr_tgt_);
|
||||
gmi_mlse_pr_tgt(r) = gmi_mlse_pr_tgt_(idx);
|
||||
best_alpha_pr_tgt(r) = alpha_vec(idx);
|
||||
|
||||
end
|
||||
|
||||
|
||||
cols = cbrewer2('paired',8);
|
||||
figure(); hold on
|
||||
title(sprintf('%d GBd',fsym(r).*1e-9));
|
||||
scatter(alpha_vec,ber_mlse_,15,'Marker','o','LineWidth',1,'DisplayName','MLSE','MarkerEdgeColor',cols(1,:));
|
||||
scatter(best_alpha(r),ber_mlse(r),15,'Marker','o','LineWidth',2,'DisplayName','MLSE','MarkerEdgeColor',cols(2,:));
|
||||
scatter(alpha(r),ber_mlse_burg(r),25,'Marker','+','LineWidth',2,'DisplayName','MLSE','MarkerEdgeColor',cols(2,:));
|
||||
|
||||
scatter(1,ber_db_diff_precoded(r),15,'Marker','diamond','LineWidth',2,'DisplayName','Duobinary','MarkerEdgeColor',cols(4,:));
|
||||
scatter(1,ber_db(r),15,'Marker','diamond','LineWidth',2,'DisplayName','Duobinary','MarkerEdgeColor',cols(4,:));
|
||||
|
||||
scatter(alpha_vec,ber_mlse_pr_tgt_,15,'Marker','x','LineWidth',1,'DisplayName','MLSE Partial Resp tgt','MarkerEdgeColor',cols(5,:));
|
||||
scatter(best_alpha_pr_tgt(r),ber_mlse_pr_tgt(r),25,'Marker','x','LineWidth',2,'DisplayName','MLSE','MarkerEdgeColor',cols(6,:));
|
||||
|
||||
set(gca,"YScale","log");
|
||||
% ylim([1e-6 0.5]);
|
||||
% xlim([0.1 1]);
|
||||
drawnow;
|
||||
|
||||
|
||||
|
||||
end
|
||||
|
||||
@@ -413,9 +501,9 @@ m = floor(log2(M)*10)/10;
|
||||
figure(113+M); clf; hold on;
|
||||
|
||||
netrates_vnle = tp.calculateNetRate(fsym.* m, ...
|
||||
'NGMI', gmi_vnle_bitwise./m, ...
|
||||
'BER', ber_vnle);
|
||||
%
|
||||
'NGMI', gmi_vnle_bitwise./m, ...
|
||||
'BER', ber_vnle);
|
||||
%
|
||||
plot(xGHz, gmi_vnle_bitwise.*xGHz, ...
|
||||
'DisplayName','GMI*R VNLE', ...
|
||||
mk.VNLE{:}, 'LineStyle','-','LineWidth',LINE_WIDTH,'Color',cm.VNLE);
|
||||
@@ -428,15 +516,15 @@ plot(xGHz, netrates_vnle.HD.NetRate.*1e-9, ...
|
||||
mk.VNLE{:}, 'LineStyle','-.','LineWidth',LINE_WIDTH,'Color',cm.VNLE);
|
||||
|
||||
|
||||
%
|
||||
%
|
||||
% MLSE symbol-wise (if present)
|
||||
plot(xGHz, gmi_mlse.*xGHz, ...
|
||||
'DisplayName','GMI*R MLSE', ...
|
||||
mk.MLSE{:}, 'LineStyle','-','LineWidth',LINE_WIDTH,'Color',cm.MLSE);
|
||||
|
||||
netrates_mlse = tp.calculateNetRate(fsym.* m, ...
|
||||
'NGMI', gmi_mlse./m, ...
|
||||
'BER', ber_mlse);
|
||||
'NGMI', gmi_mlse./m, ...
|
||||
'BER', ber_mlse);
|
||||
plot(xGHz, netrates_mlse.SDHD.NetRate.*1e-9, ...
|
||||
'DisplayName','SD+HD MLSE', ...
|
||||
mk.MLSE{:}, 'LineStyle',':','LineWidth',LINE_WIDTH,'Color',cm.MLSE);
|
||||
@@ -451,8 +539,8 @@ plot(xGHz, gmi_mlse_db.*xGHz, ...
|
||||
mk.DB{:}, 'LineStyle','-','LineWidth',LINE_WIDTH,'Color',cm.DB);
|
||||
|
||||
netrates_db = tp.calculateNetRate(fsym.* m, ...
|
||||
'NGMI', gmi_mlse_db./m, ...
|
||||
'BER', ber_db);
|
||||
'NGMI', gmi_mlse_db./m, ...
|
||||
'BER', ber_db);
|
||||
|
||||
plot(xGHz, netrates_db.SDHD.NetRate.*1e-9, ...
|
||||
'DisplayName','SD+HD DB', ...
|
||||
@@ -473,7 +561,7 @@ xlim([184, 256])
|
||||
|
||||
% Auxiliary nested helper for numerically stable log-sum-exp
|
||||
function s = logsumexp(a)
|
||||
% LOGSUMEXP Compute log(sum(exp(a))) in a numerically stable way
|
||||
m = max(a);
|
||||
s = m + log(sum(exp(a - m)));
|
||||
% LOGSUMEXP Compute log(sum(exp(a))) in a numerically stable way
|
||||
m = max(a);
|
||||
s = m + log(sum(exp(a - m)));
|
||||
end
|
||||
|
||||
@@ -136,9 +136,5 @@ eq_signal_hd = PAMmapper(M, 0).quantize(eq_signal_sd);
|
||||
% Process through postfilter and MLSE
|
||||
[mlse_sig_sd,whitened_noise] = pf_.process(eq_signal_sd, eq_noise);
|
||||
mlse_.DIR = pf_.coefficients;
|
||||
|
||||
constellation = [-3, -1, 1, 3];
|
||||
chatgpt_answer(mlse_sig_sd.signal, Symbols.signal,mlse_.DIR,constellation);
|
||||
|
||||
% mlse_sig_sd = mlse_.process(mlse_sig_sd,Symbols);
|
||||
% mlse_sig_hd = PAMmapper(M, 0, "eth_style", options.eth_style_symbol_mapping).quantize(mlse_sig_sd);
|
||||
mlse_sig_sd = mlse_.process(mlse_sig_sd,Symbols);
|
||||
mlse_sig_hd = PAMmapper(M, 0, "eth_style", 0).quantize(mlse_sig_sd);
|
||||
|
||||
Reference in New Issue
Block a user