duobinary cleanup (currently it is a mess)

test/duobinary_emulation_minimal_example.m

@@ -1,7 +1,7 @@
 
 
-M = 6;
-apply_precode = 1;
+M = 4;
+apply_precode = 0;
 
 bitpattern = [];
 s = RandStream('twister','Seed',1);
@@ -29,12 +29,12 @@ else
 end
 
 show2Dconstellation(symbols_tx,symbols_tx,"displayname",'VNLE Out','fignum',2241);
-    
+
 
 if apply_precode
     % Entschiedene Symbole codieren: d_DB(n) = d(n) + d(n-1)    (im Fall von PAM4 7 level [0 1 2 3 4 5 6])
     symbols_db = Duobinary().encode(symbols_tx);
-    
+
     % Entschiedene codierte Symbole decodieren: d_dec(n) = d_DB(n) mod4
     symbols_rx = Duobinary().decode(symbols_db);
 else
@@ -51,6 +51,8 @@ disp(['BER: ',sprintf('%.1E',ber),' - - PAM-',num2str(M)]);
 figure(200)
 clf
 hold on
+start = 100;
+burstwidth = 10;
 idxs = start-10:start+burstwidth+10;
 scatter(idxs,d.signal(idxs),'DisplayName',['Orig Signal'],'Marker','o');
 scatter(idxs,d_burst.signal(idxs),'DisplayName',['Error Signal'],'Marker','x');