Error Control Coding

% file name:    bsc.m
% description:  bsc_out = bsc（bsc_inpx） is a model of binary symetric channel.
%               the function is provided with bsc_in the binary sequence or array into bsc （number of columns * px must >= 1）
%               and px the crossover probability of the bsc channel.
%               it outputs bsc_out which is the corrupted binary sequnece or array coming out of the bsc.
% algorithm:    use randerr to generate error sequnece or array
% author:       y. jiang 
% date:         june 2010
% revision:     1.0


function bsc_out = bsc（bsc_inpx）

[mn] = size（bsc_in）;

if n*px < 1
    disp（‘Error! not enough input columns!‘）;
    bsc_out = [];
elseif length（find（bsc_in==0）） + length（find（bsc_in==1）） ~= numel（bsc_in） 
    disp（‘Error! nonbinary input!‘）;
    bsc_out = [];
else
    num_err = fix（px*n）;                                                % number of errors per row
    bsc_out = mod（bsc_in+randerr（mnnum_err）2）;
end

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     目录           0  2015-04-27 12:12  A_Practical_Guide_to_Error_Control_Coding_Using_MATLAB
     文件     3728437  2015-04-27 09:05  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABA_Practical_Guide_to_Error_Control_Coding_Using_MATLAB.pdf
     目录           0  2015-04-27 12:11  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1
     文件         989  2010-08-16 00:41  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1sc.m
     文件         375  2010-08-16 00:41  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1sc_ex.m
     文件        1169  2010-08-16 00:41  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1cgain.m
     文件         428  2010-08-16 00:41  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1cgain_ex.m
     文件         809  2010-08-15 11:22  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1chcap.m
     文件         408  2010-08-16 00:41  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch1qfunc.m
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     文件        1246  2010-08-16 11:34  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch2gfinv_lfsr.m
     文件         257  2010-08-16 11:34  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch2gfinv_lfsr_ex.m
     文件         545  2010-08-16 11:35  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch2gfinvp.m
     文件         268  2010-08-15 11:17  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch2gfinvp_ex.m
     文件         587  2010-08-15 13:13  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch2gfmulp.m
     文件         274  2010-08-16 11:35  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch2gfmulp_ex.m
     目录           0  2015-04-27 12:11  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3
     文件        1510  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3psksim.m
     文件         535  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3psktheory.m
     文件         828  2010-08-15 10:06  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3chsrchdemo.m
     文件         767  2010-08-15 13:08  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3crcchk.m
     文件         446  2010-08-15 10:14  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3crcchk_ex.m
     文件         474  2010-08-16 11:37  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3dmin_ex.m
     文件         759  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3errpat.m
     文件          50  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3errpat_ex.m
     文件         399  2010-08-15 10:15  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3exp3_1.m
     文件         469  2010-08-15 10:15  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3exp3_3.m
     文件         732  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3g2hpoly.m
     文件         430  2010-08-15 13:07  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3ghchk.m
     文件         279  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3ghchk_ex.m
     文件        1769  2010-08-16 11:36  A_Practical_Guide_to_Error_Control_Coding_Using_MATLABch3hammdec.m
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