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database_channel_codes.m
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database_channel_codes.m
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function [ code, numCodedBits, numBits ] = database_channel_codes( parameters )
%DATABASE_CHANNEL_CODES Stores details of predefined channel codes.
% Database Summary:
%
% PCCCg23g35
% PCCCg23g35p
% LDPCk1n2large
switch parameters.chancode
% <<<<< 1/3-rate PCCC >>>>>
case 'PCCCg23g35'
% Constraint Length
code.constraint_length = 5;
% Binary Generators
code.FFbin = [1 0 0 1 1]'; % octal generator 23
code.FBbin = [1 1 1 0 1]'; % octal generator 35
code.FF = [35, 23];
code.FB = 35;
% Convolutional code state termination
code.termA = 'punc';
code.termB = 'term';
if strcmp(code.termA,'term'), code.LA = code.constraint_length-1; else code.LA = 0; end
if strcmp(code.termB,'term'), code.LB = code.constraint_length-1; else code.LB = 0; end
% Determine number of information/coded bits
if isfield(parameters,'numBits')==1
numCodedBits = 3*parameters.numBits + 2*code.LA + 2*code.LB;
elseif isfield(parameters,'numCodedBits_target')==1
parameters.numBits = floor( (parameters.numCodedBits_target - 2*code.LA - 2*code.LB)/3 );
numCodedBits = 3*parameters.numBits + 2*code.LA + 2*code.LB;
else
error('Define either ''numBits'' or ''numCodedBits_target''.');
end
% Code rate
code.rate = 1/(3+2*(code.LA+code.LB)/parameters.numBits);
% Internal interleaver
rng(0,'twister'); code.intlvr_int = randperm(parameters.numBits);
% Puncturing
code.puncMatrix = [1 1; 1 1];
code.LPM = size(code.puncMatrix,2);
code.P = [reshape([ones(1,parameters.numBits); repmat(code.puncMatrix,1,parameters.numBits/code.LPM)],1,[]),...
repmat(code.puncMatrix(1,:),1,2*code.LA/code.LPM),...
repmat(code.puncMatrix(2,:),1,2*code.LB/code.LPM)];
% ---------------------------------------------------------------------
% <<<<< 1/2-rate PCCC >>>>>
case 'PCCCg23g35p'
% Constraint Length
code.constraint_length = 5;
% Binary Generators
code.FFbin = [1 0 0 1 1]'; % octal generator 23
code.FBbin = [1 1 1 0 1]'; % octal generator 35
code.FF = [35, 23];
code.FB = 35;
% Convolutional code state termination
code.termA = 'punc';
code.termB = 'term';
if strcmp(code.termA,'term'), code.LA = code.constraint_length-1; else code.LA = 0; end
if strcmp(code.termB,'term'), code.LB = code.constraint_length-1; else code.LB = 0; end
% Determine number of information/coded bits
if isfield(parameters,'numBits')==1
numCodedBits = 2*parameters.numBits + code.LA + code.LB;
elseif isfield(parameters,'numCodedBits_target')==1
parameters.numBits = floor( (parameters.numCodedBits_target - code.LA - code.LB)/2 );
numCodedBits = 2*parameters.numBits + code.LA + code.LB;
else
error('Define either ''numBits'' or ''numCodedBits_target''.');
end
% Code rate
code.rate = 1/(2+(code.LA+code.LB)/parameters.numBits);
% Internal interleaver
rng(0,'twister'); code.intlvr_int = randperm(parameters.numBits);
% Puncturing
code.puncMatrix = [1 0; 0 1];
code.LPM = size(code.puncMatrix,2);
code.P = [reshape([ones(1,parameters.numBits); repmat(code.puncMatrix,1,parameters.numBits/code.LPM)],1,[]),...
repmat(code.puncMatrix(1,:),1,2*code.LA/code.LPM),...
repmat(code.puncMatrix(2,:),1,2*code.LB/code.LPM)];
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC large >>>>>
case 'LDPCk1n2large'
code.k_rate = 1;
code.n_rate = 2;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate;
numCodedBits = code.blocksizeValue*code.n_rate;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,1,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC large2 >>>>>
case 'LDPCk1n2large2'
code.k_rate = 1;
code.n_rate = 2;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
% code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate*2;
numCodedBits = code.blocksizeValue*code.n_rate*2;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,2,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC large4 >>>>>
case 'LDPCk1n2large4'
code.k_rate = 1;
code.n_rate = 2;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate*4;
numCodedBits = code.blocksizeValue*code.n_rate*4;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,4,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC large8 >>>>>
case 'LDPCk1n2large8'
code.k_rate = 1;
code.n_rate = 2;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate*8;
numCodedBits = code.blocksizeValue*code.n_rate*8;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,8,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC large16 >>>>>
case 'LDPCk1n2large16'
code.k_rate = 1;
code.n_rate = 2;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate*16;
numCodedBits = code.blocksizeValue*code.n_rate*16;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,16,1));
% ---------------------------------------------------------------------
% <<<<< 1/3-rate LDPC large2 >>>>>
case 'LDPCk1n3large2'
code.k_rate = 1;
code.n_rate = 3;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.G = [code.G, zeros(size(code.G)); zeros(size(code.G)), code.G];
code.H = [code.H, zeros(size(code.H)); zeros(size(code.H)), code.H];
% code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate*2;
numCodedBits = code.blocksizeValue*code.n_rate*2;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,2,1));
% ---------------------------------------------------------------------
% <<<<< 1/4-rate LDPC large >>>>>
case 'LDPCk1n4large'
code.k_rate = 1;
code.n_rate = 4;
code.blocksize = 'large'; code.blocksizeValue = 541;
[~,~,code.G,code.H] = codec_config_LDPC_DMPL_unified(code.k_rate,code.n_rate,code.blocksize,2);
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Determine number of coded bits
numBits = code.blocksizeValue*code.k_rate;
numCodedBits = code.blocksizeValue*code.n_rate;
% Code rate
code.rate = code.k_rate/code.n_rate;
% Transpose G matrix
code.G = code.G.';
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,1,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC generated set 1 >>>>>
case 'LDPCk1n2gen1'
% Code
load ldpc_set_1
code.H = H;
code.G = G;
clear H G
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Number of coded bits
[numParity, numCodedBits] = size(code.H);
numBits = numCodedBits - numParity;
% Code rate
code.k_rate = 1;
code.n_rate = 2;
code.rate = code.k_rate/code.n_rate;
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,1,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC generated set 2 >>>>>
case 'LDPCk1n2gen2'
% Code
load ldpc_set_2
code.H = H;
code.G = G;
clear H G
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Number of coded bits
[numParity, numCodedBits] = size(code.H);
numBits = numCodedBits - numParity;
% Code rate
code.k_rate = 1;
code.n_rate = 2;
code.rate = code.k_rate/code.n_rate;
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,2,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC generated set 4 >>>>>
case 'LDPCk1n2gen4'
% Code
load ldpc_set_4
code.H = H;
code.G = G;
clear H G
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Number of coded bits
[numParity, numCodedBits] = size(code.H);
numBits = numCodedBits - numParity;
% Code rate
code.k_rate = 1;
code.n_rate = 2;
code.rate = code.k_rate/code.n_rate;
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,4,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC generated set 8 >>>>>
case 'LDPCk1n2gen8'
% Code
load ldpc_set_8
code.H = H;
code.G = G;
clear H G
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Number of coded bits
[numParity, numCodedBits] = size(code.H);
numBits = numCodedBits - numParity;
% Code rate
code.k_rate = 1;
code.n_rate = 2;
code.rate = code.k_rate/code.n_rate;
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,8,1));
% ---------------------------------------------------------------------
% <<<<< 1/2-rate LDPC generated set 16 >>>>>
case 'LDPCk1n2gen16'
% Code
load ldpc_set_16
code.H = H;
code.G = G;
clear H G
code.hEnc = comm.LDPCEncoder(sparse(code.H));
% Number of coded bits
[numParity, numCodedBits] = size(code.H);
numBits = numCodedBits - numParity;
% Code rate
code.k_rate = 1;
code.n_rate = 2;
code.rate = code.k_rate/code.n_rate;
% Information bit index
ind = [zeros(code.blocksizeValue*code.n_rate - code.blocksizeValue*code.k_rate,1);...
ones(code.blocksizeValue*code.k_rate,1)];
code.bitIndex = find(repmat(ind,16,1));
% ---------------------------------------------------------------------
end
end