modulate256.m

幅度相位调制解调代码

function y = modulate256(x,s256)
% function y = modulate(x,b,e, s2,s4,s16,s64,s256)
%
%    y - modulated output, in the form of a row vector
%    x - a vector of input bits, for all the subcarriers (row vector)
%    b - subcarrier bit allocation (64 elements in this matrix, each one
%        corresponding to the number of bits to be allocated to the subcarrier
%        having the same index)
%    e - subcarrier energy allocation (64 elements in this matrix, each one
%        corresponding to the energy to be allocated to the subcarrier
%        having the same index)
%    s_ - the encoder for a given constellation size
e=32;
y=[];
m=length(x)/8; 
for i = 1:m  
    y = [y s256(x(i*8-7:i*8)*[128;64;32;16;8;4;2;1]+1)*sqrt(e)];
end