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Scattered stuff from Silas during Dissertation

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This commit is contained in:
Silas Oettinghaus
2026-06-03 09:05:33 +02:00
parent a91da3b97c
commit 5c2e27687d
37 changed files with 1726 additions and 1338 deletions
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19
Theory/Mapping_Coding/partial_response/duobinary_back2back.m
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@@ -1,5 +1,5 @@
for M = [2 4 8]
bits = Signalgenerator("form", signalform.prms,"M", M,"order", 16).process();
for M = [4]
bits = Signalgenerator("form", signalform.prms,"M", M,"order", 18).process();
mapper = PAMmapper(M,0);
symbols = mapper.map(bits);
@@ -8,6 +8,13 @@ for M = [2 4 8]
symbols_pre = db.precode(symbols);
symbols_db = db.encode(symbols_pre);
%%% TEST 1
symbols_db_ = awgn_channel(symbols_db,"snr_dB",15);
figure(1003042);
showLevelHistogram(symbols_db_,symbols_db,"ref_symbol_uncoded",symbols);
showLevelHistogram(symbols_db_,symbols_db);
symbols_rx = db.decode(symbols_db);
bits_rx = PAMmapper(M,0).demap(symbols_rx);
[~,~,ber,~] = calc_ber(bits.signal,bits_rx.signal,"skip_front",0,"skip_end",0,"returnErrorLocation",1);
@@ -15,6 +22,12 @@ for M = [2 4 8]
symbols_pre_pr = pr1.precode(symbols,"M",M);
symbols_db_pr = pr1.encode(symbols_pre_pr,"M",M);
%%% TEST 2
symbols_db_pr_ = awgn_channel(symbols_db_pr,"snr_dB",15);
figure(1003043);
% showLevelHistogram(symbols_db_pr_,symbols_db_pr,"ref_symbol_uncoded",symbols);
symbols_rx_pr = pr1.decode(symbols_db_pr,"M",M);
bits_rx_pr = mapper.demap(symbols_rx_pr);
[~,~,ber_pr,~] = calc_ber(bits.signal,bits_rx_pr.signal,"skip_front",0,"skip_end",0,"returnErrorLocation",1);
@@ -36,6 +49,8 @@ for M = [2 4 8]
' | max abs diff: ',sprintf('%.3g',dec_maxdiff)]);
disp('---');
f = figure("Name",sprintf("PAM-%d Partial-Response Histograms",M));
t = tiledlayout(f,1,4,"TileSpacing","compact","Padding","compact");
title(t,sprintf("PAM-%d Symbol Histograms",M));