fxy0.m

来自「压缩文件中是Error Correction Coding - Mathemat」· M 代码 · 共 19 行

function f = fxy0(x,ysigma2)
% compute f(x|y)
% the value of x is a 0 (meaning a -1 is sent)
% or a 1 (meaning a 1 is sent)
% The argument ysigma2 is an array of "auxiliary" values, 
% ysigma2(1) = y value,
% ysigma2(2) = sigma^2
% ysigma2(3) = a

% Copyright 2004 by Todd K. Moon
% Permission is granted to use this program/data
% for educational/research only

y = ysigma2(1);
sigma2 = ysigma2(2);
a = ysigma2(3);

f = 1/(1+exp(-2*y*a*(2*x-1)/sigma2));