hfun.m

一个二阶中心插值滤波器（DDF2）的目标跟踪仿真实例。

function [y] = hfun(x);
% PURPOSE : Measurement model function .
% INPUTS  : - x:  Hidden state
%         : - u:  control vector  
%           - n:  Measurement noise
%           - t:  time index or itegration constant
% OUTPUTS : - y:  Observation of state
y0=10;
y = atan(x/y0);