tx_conv_encoder.m

多径信道下的ofdm仿真系统

%
% 	Convolutional encoding with unipolar data

function coded_bits = tx_conv_encoder(in_bits)

global sim_consts;
ConvCodeGenPoly=[1 0 1 1 0 1 1;1 1 1 1 0 0 1 ]
number_rows = size(ConvCodeGenPoly, 1);
number_bits = size(ConvCodeGenPoly,2)+length(in_bits)-1;

uncoded_bits = zeros(number_rows, number_bits);

for row=1:number_rows
 uncoded_bits(row,1:number_bits)=rem(conv(in_bits, ConvCodeGenPoly(row,:)),2);
end

coded_bits=uncoded_bits(:,1:end);
coded_bits=reshape(coded_bits,1,size(coded_bits,1)*size(coded_bits,2));