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This commit is contained in:
Silas Oettinghaus
2025-02-14 14:54:03 +01:00
parent 2be1254611
commit becaf3f6c9
26 changed files with 1507 additions and 1052 deletions
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3
test/duobinary_emulation_minimal_example.m
View File

@@ -1,5 +1,5 @@
useprbs = 1;
M = 4;
M = 6;
randkey = 1;
datarate = 224e9;
fsym = round(datarate / log2(M)) ;
@@ -63,6 +63,7 @@ Tx_bits = Bits;
disp(['BER: ',sprintf('%.1E',ber),' - - PAM-',num2str(M)]);
figure(200)
clf
hold on

16
test/duobinary_minimal_example.m
View File

@@ -1,5 +1,5 @@
useprbs = 1;
M = 4;
M = 6;
randkey = 1;
datarate = 448e9;
fsym = round(datarate / log2(M)) ;
@@ -38,19 +38,33 @@ loop = 1;
[data_out,state_out] = prms(data_in, state_, para);
bitpattern = data_out';
if M == 6
bitpattern = reshape(bitpattern',[],1);
bitpattern = bitpattern(1:end-mod(length(bitpattern),5));
end
Tx_bits = Informationsignal(bitpattern);
%%%%% Duobinary %%%%%%
close all
Symbols_tx = PAMmapper(M,0).map(Tx_bits);
Symbols_tx.fs = fsym;
Symbols1 = Duobinary().precode(Symbols_tx);
figure;histogram(Symbols1.signal);
Symbols2 = Duobinary().encode(Symbols1);
figure;histogram(Symbols2.signal);
Symbols3 = Duobinary().decode(Symbols2);
figure;histogram(Symbols3.signal);
autoArrangeFigures;
Rx_bits = PAMmapper(M,0).demap(Symbols3);
%%%%% Check BER of Bit Sequence %%%%%%
[~,error_num,ber,error_pos] = calc_ber(Tx_bits.signal,Rx_bits.signal,"skip_front",0,"skip_end",0,"returnErrorLocation",1);
disp(['BER: ',sprintf('%.1E',ber),' - - PAM-',num2str(M)]);

52
test/mapping_minimal_example.m
View File

@@ -7,6 +7,55 @@ randkey = 1;
fsym = 112e9;
viewresults = 0;
%%%%% Mapping %%%%%
M = 8;
data = 0:M-1;
bitpersymbol = log2(M);
%Bits
bits = int2bit(data,bitpersymbol, true);
%Integers
ints = bit2int(bits,bitpersymbol, true);
Tx_bits = Informationsignal(bits');
Digi_Mod = PAMmapper(M,0);
Symbols = Digi_Mod.map(Tx_bits);
moveitgray = Symbols.signal;
%Gray Symbol Mapping
matlabgray = pammod(ints,M,0,'gray');
scaling_factor = rms(unique(matlabgray));
matlabgray = matlabgray ./ scaling_factor;
%Demod
moveitgray = moveitgray.* scaling_factor;
matlabgray = matlabgray .* scaling_factor;
ints_demap = pamdemod(matlabgray,M,0,'gray');
bits_demap = int2bit(ints_demap,bitpersymbol, true);
% for i = 1:M
% fprintf('%d , %d , %d --> %d \n',bits(1,i),bits(2,i),bits(3,i),matlabgray(i));
% end
%
% for i = 1:M
% fprintf('%d , %d , %d --> %d \n',bits(1,i),bits(2,i),bits(3,i),moveitgray(i));
% end
scatterplot(matlabgray,1,0,'b*');
for k = 1:M
text(real(matlabgray(k)),imag(matlabgray(k))+0.6,num2str(ints_demap(k)),"Color",[1 1 1]);
text(real(matlabgray(k)),imag(matlabgray(k))-1.6,num2str(bits(:,k)),"Color",'blue');
text(real(moveitgray(k)),imag(moveitgray(k))-3,num2str(bits(:,k)),"Color",'green');
end
axis([-M M -3 2])
symbols = bit2int(bitGroups',bitpersymbol, true);
%%%%% PRBS Generation in correct shape for Modulation Format %%%%%%
O = 10; %order of prbs
@@ -34,6 +83,9 @@ Tx_bits = Informationsignal(bitpattern);
Digi_Mod = PAMmapper(M,0);
symbols = bitMapper(bitpattern, M, 'PAM');
Symbols = Digi_Mod.map(Tx_bits);
Rx_bits = PAMmapper(M,0).demap(Symbols);