escorfre.m

来自「基于超外差的瞬时测频方法的研究。请多多指教」· M 代码 · 共 13 行

function a1=EsCorFre(parBpsk,conjBpsk,delay,dt)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%延迟相关后估计信号频率函数
%主要应用于估计线性调频信号中对调频系数k的估计算法
%输入参数parBpsk为原信号，conjBpsk为parBpsk的共轭，delay为延迟点数
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
len=length(parBpsk);
y1=parBpsk(delay+1:len).*conjBpsk(1:len-delay);
a1=ThreeFFT(y1,dt);
if a1>(0.5/dt)
	a1=-((1/dt)-a1);
end;
return;