📄 sova.htm
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>if(</span> <span class=SpellE>enc.k</span> == 1 )<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span
style='mso-spacerun:yes'> </span><span
class=GramE>out</span> = sovadec_1N( <span class=SpellE>msg</span>, <span
class=SpellE>llr</span>, <span class=SpellE>trl</span>, win );<span
style='mso-spacerun:yes'> </span>% use 1/N optimized
code (2x faster)<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>else</span><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span
style='mso-spacerun:yes'> </span><span
class=GramE>out</span> = <span class=SpellE>sovadec_KN</span>( <span
class=SpellE>msg</span>, <span class=SpellE>llr</span>, <span class=SpellE>trl</span>,
win );<span style='mso-spacerun:yes'> </span>% <span
class=SpellE>uset</span> K/N generic code<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>end</span><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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class=GramE><span lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:
宋体;mso-font-kerning:0pt'>return</span></span><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt'>;<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><o:p> </o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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class=GramE><span lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:
宋体;mso-font-kerning:0pt'>function</span></span><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt'> enc = trellis2enc( <span class=SpellE>trl</span> ),<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'>% put the trellis structure into a more user friendly
manner<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><o:p> </o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.k</span> = <span class=GramE>log2(</span> <span class=SpellE>trl.numInputSymbols</span>
);<span
style='mso-spacerun:yes'>
</span>% number of inputs<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.n</span> = <span class=GramE>log2(</span> <span class=SpellE>trl.numOutputSymbols</span>
);<span
style='mso-spacerun:yes'>
</span>% <span class=SpellE>numbor</span> of outputs<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.r</span> = <span class=SpellE>enc.k</span> / <span
class=SpellE>enc.n</span>;<span
style='mso-spacerun:yes'>
</span><span
style='mso-spacerun:yes'> </span>%
code rate<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.ksym</span> = <span class=SpellE>trl.numInputSymbols</span>;<span
style='mso-spacerun:yes'>
</span>% number of possible input combinations<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.nsym</span> = <span class=SpellE>trl.numOutputSymbols</span>;<span
style='mso-spacerun:yes'>
</span>% number of possible output combinations<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.stat</span> = <span class=SpellE>trl.numStates</span>;<span
style='mso-spacerun:yes'> </span><span
style='mso-spacerun:yes'> </span>%
number of encoder states<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><o:p> </o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'>
</span>% forward transitions:<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.next.states</span> = <span class=SpellE>trl.nextStates</span>
+ 1;<span
style='mso-spacerun:yes'>
</span>% NEXT states<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>enc.next.output</span> = <span class=SpellE>trl.outputs</span>;<span
style='mso-spacerun:yes'>
</span>% NEXT outputs<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>for</span> <span class=SpellE>i</span> = 1:enc.ksym,<span
style='mso-spacerun:yes'> </span><span
style='mso-spacerun:yes'> </span>%
NEXT (binary) outputs<o:p></o:p></span></p>
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span
style='mso-spacerun:yes'> </span><span
class=SpellE>enc.next.binout</span>( :,:,<span class=SpellE>i</span> ) =
2*de2bi( oct2dec( <span class=SpellE>trl.outputs</span>(:,<span class=SpellE>i</span>)
), <span class=SpellE>enc.n</span> )-1;<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan;
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>end</span><o:p></o:p></span></p>
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lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'><span style='mso-spacerun:yes'> </span><o:p></o:p></span></p>
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