bb_modulation.m

通信中常用的卷积码信道译码源码程序

function [Data_mod] = bb_modulation(Data_coded, ModMap);

%------------------------------------------------------------------------------
% Modulate binary 1-D data vector.
%
% Format:
% -------
%
% [Data_mod] = bb_modulation(Data_coded, ModMap);
% 
% Author: MVe
% Date:   05.07.2002
%------------------------------------------------------------------------------

Nbits = log2(length(ModMap));

% Bit->"pointer" transformation
OLength_ptr = length(Data_coded)/Nbits;
tmp = zeros(OLength_ptr,1);
Outputs_ptr = zeros(1,OLength_ptr);
tmp(:,1) = ...
    bin2dec(reshape(char(Data_coded+48),Nbits,OLength_ptr).')+1;
Outputs_ptr = tmp.';

% Modulation
Data_mod = ModMap(Outputs_ptr).';