faten_chaa
Newbie level 2
i have implemented a code for puncturing coding with rate =2/3 (i use the encoding in watermarking)
the problem that the output is null when tb is high
the puncturing is
t = poly2trellis(3,[6 7]);
v=convenc(msg,t, [1 0 1 1]);
and the depuncturing and decoding is
vitdec(mes_recu,t,tb,'cont','hard',[1 0 1 1])
i don't understand why the output of vitdec is null for high tb and the output is bad for low tb
can any one help me???? it very important , i can't continue!!
the problem that the output is null when tb is high
the puncturing is
t = poly2trellis(3,[6 7]);
v=convenc(msg,t, [1 0 1 1]);
and the depuncturing and decoding is
vitdec(mes_recu,t,tb,'cont','hard',[1 0 1 1])
i don't understand why the output of vitdec is null for high tb and the output is bad for low tb
can any one help me???? it very important , i can't continue!!