clc;
close?all;
????
%基帶信號
codeRate?=?2/3;
traceBack?=?15;
num_baseband?=?100000000;
num_baseband_fec?=?num_baseband?/?codeRate;
%test?para
times?=?200;
err_probability_step?=?0.001;
recive_codeword_1?=?zeros（num_baseband_fec1）;
recive_codeword_2?=?zeros（num_baseband_fec1）;
ber_1?=?zeros（times1）;
ber_2?=?zeros（times1）;
err_ratio_1?=?zeros（times1）;
err_ratio_2?=?zeros（times1）;

err_probability?=?（0:err_probability_step:（times?-?1）?*?err_probability_step）;
data_ori?=?randi（[0?1]num_baseband1）;

tPoly_1?=?poly2trellis（[3?3][7?2?5;?6?5?1]）;
tPoly_2?=?poly2trellis（[3?3][7?1?4;?2?5?7]）;

hVitDec_1?=?comm.ViterbiDecoder（tPoly_1?‘InputFormat‘‘hard‘?‘TracebackDepth‘...
????traceBack?‘TerminationMethod‘?‘Truncated‘）;
hVitDec_2?=?comm.ViterbiDecoder（tPoly_2?‘InputFormat‘‘hard‘?‘TracebackDepth‘...
????traceBack?‘TerminationMethod‘?‘Truncated‘）;

%?codeword_1?=?hEnc_1（data_ori）;
%?codeword_2?=?hEnc_2（data_ori）;