silas/imdd_silas
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Working from home on zürich DSP.

Browse Source
This commit is contained in:
silas (home)
2025-03-10 08:56:17 +01:00
parent affdb4ad6f
commit bc86fa8d98
22 changed files with 459 additions and 137 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
Functions/EQ_structures/duobinary_target.m
View File

@@ -9,6 +9,7 @@ arguments
tx_bits
options.precode_mode db_mode
options.showAnalysis = 0;
options.eth_style_symbol_mapping = 0;
end
%Duobinary Targeting
@@ -18,7 +19,7 @@ end
% dir = [1,1];
mlse_sig_sd = mlse_.process(eq_signal);
mlse_sig_hd = PAMmapper(M,0).quantize(mlse_sig_sd);
mlse_sig_hd = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).quantize(mlse_sig_sd);
% precoding to mitigate error propagation, most prominently used in
% combination with duobinary signaling to avoid catastrophic error
@@ -37,12 +38,12 @@ end
tx_symbols_precoded = Duobinary().encode(tx_symbols);
tx_symbols_precoded = Duobinary().decode(tx_symbols_precoded);
tx_bits = PAMmapper(M,0).demap(tx_symbols_precoded);
tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols_precoded);
case db_mode.db_discard
% normal dsp for precoded sequence == discard/omit/ignore precode
tx_bits = PAMmapper(M,0).demap(tx_symbols);
tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols);
case db_mode.db_encoded
@@ -56,7 +57,7 @@ end
end
% M = numel(unique(tx_symbols.signal));
rx_bits = PAMmapper(M,0).demap(mlse_sig_hd);
rx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(mlse_sig_hd);
[~,numErrors,ber,~] = calc_ber(rx_bits.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
@@ -66,11 +67,15 @@ end
if options.showAnalysis
eq_noise = eq_noise - mean(eq_noise.signal);
rx_signal.spectrum("normalizeTo0dB",1,"fignum",250);
rx_signal.spectrum("normalizeTo0dB",1,"fignum",250,"displayname","Rx Spectrum");
showEQNoisePSD(eq_noise,"fignum",250,"displayname",'Duobinary Target Noise');
Duobinary().encode(tx_symbols).spectrum("normalizeTo0dB",1,"fignum",250,"displayname","DB encoded reference");
Duobinary().encode(tx_symbols).spectrum("normalizeTo0dB",1,"fignum",250);
showEQNoisePSD(eq_noise,"fignum",250,"displayname",'Duobinary Target Noise after Equalization');
fprintf('DB tgt BER: %.2e \n',ber);
end

7
Functions/EQ_structures/vnle.m
View File

@@ -74,20 +74,21 @@ function [eq_package] = vnle(eq_,M,rx_signal,tx_symbols,tx_bits,options)
[~,numErrors,ber,~] = calc_ber(rx_bits.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
[evm_total,evm_lvl] = calc_evm(eq_signal_sd,tx_symbols);
[inf_rate] = calc_air(eq_signal_sd,tx_symbols,"skip_front",10000,"skip_end",10000);
snr(eq_signal_sd.signal,eq_noise.signal)
eq_package.ber_vnle = ber;
eq_package.evm_total = evm_total;
eq_package.evm_lvl = evm_lvl;
eq_package.inf_rate_vnle = inf_rate;
eq_package.snr = snr(eq_signal_sd.signal,eq_noise.signal);
eq_package.signal = eq_signal_sd;
if options.showAnalysis
snr(eq_signal_sd.signal,eq_noise.signal);
fprintf('SNR: %d dB \n',snr(eq_signal_sd.signal,eq_noise.signal));
fprintf(['VNLE EVM lvl: ',repmat('%.3f ',1,numel(evm_lvl)),' \n'],evm_lvl);
fprintf('VNLE BER: %.2e \n',ber);

11
Functions/EQ_structures/vnle_postfilter_mlse.m
View File

@@ -10,6 +10,7 @@ arguments
tx_bits
options.precode_mode db_mode
options.showAnalysis = 0;
options.eth_style_symbol_mapping = 0;
end
%FFE or VNLE
@@ -23,7 +24,7 @@ end
% [mlse_sig_hd,mlse_sig_sd] = mlse_.process(mlse_sig_sd,tx_symbols);
mlse_sig_sd = mlse_.process(mlse_sig_sd);
mlse_sig_hd = PAMmapper(M,0).quantize(mlse_sig_sd);
mlse_sig_hd = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).quantize(mlse_sig_sd);
% precoding to mitigate error propagation, most prominently used in
% combination with duobinary signaling to avoid catastrophic error
@@ -46,12 +47,12 @@ end
tx_symbols_precoded = Duobinary().encode(tx_symbols);
tx_symbols_precoded = Duobinary().decode(tx_symbols_precoded);
tx_bits = PAMmapper(M,0).demap(tx_symbols_precoded);
tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols_precoded);
case db_mode.db_discard
% normal dsp for precoded sequence == discard/omit/ignore precode
tx_bits = PAMmapper(M,0).demap(tx_symbols);
tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols);
case db_mode.db_encoded
@@ -68,7 +69,7 @@ end
end
% METRICS OF VNLE %
rx_bits_vnle = PAMmapper(M,0).demap(eq_signal_hd);
rx_bits_vnle = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(eq_signal_hd);
[~,~,ber_vnle,~] = calc_ber(rx_bits_vnle.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
% correct TUM implementation of AIR
@@ -76,7 +77,7 @@ end
[evm_vnle_total,evm_vnle_lvl] = calc_evm(eq_signal_sd,tx_symbols);
% METRICS OF MLSE (HD-VITERBI)
rx_bits_mlse = PAMmapper(M,0).demap(mlse_sig_hd);
rx_bits_mlse = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(mlse_sig_hd);
[~,~,ber_mlse,~] = calc_ber(rx_bits_mlse.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);