qfunct.m

来自「QPSK在加性高斯白噪声环境下」· M 代码 · 共 8 行

function [y]=Qfunct(x)
% [y]=Qfunct(x)
%		QFUNCT  evaluates the Q-function. 
%   		y = 1/sqrt(2*pi) * integral from x to inf of exp(-t^2/2) dt.
%     		y = (1/2) * erfc(x/sqrt(2)).
y=(1/2)*erfc(x/sqrt(2));