预测模型基于weiner滤波预测matlab源码

Posted 2021-06-29 MatlabQQ1575304183

一、简介

基于matlab GUI一步线性+weiner滤波预测

二、源代码

function varargout = WeinerFilter(varargin)
% WEINERFILTER M-file for WeinerFilter.fig
%      WEINERFILTER, by itself, creates a new WEINERFILTER or raises the existing
%      singleton*.
%
%      H = WEINERFILTER returns the handle to a new WEINERFILTER or the handle to
%      the existing singleton*.
%
%      WEINERFILTER('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in WEINERFILTER.M with the given input arguments.
%
%      WEINERFILTER('Property','Value',...) creates a new WEINERFILTER or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before WeinerFilter_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to WeinerFilter_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help WeinerFilter

% Last Modified by GUIDE v2.5 28-May-2021 16:23:34

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @WeinerFilter_OpeningFcn, ...
                   'gui_OutputFcn',  @WeinerFilter_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before WeinerFilter is made visible.
function WeinerFilter_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to WeinerFilter (see VARARGIN)

% Choose default command line output for WeinerFilter
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);
    set(handles.listSignal,'string', ...
    '1-|2-AR过程的信号|3-两个正弦信号叠加+N|4-单一正弦信号|5-SAR_Line');
% UIWAIT makes WeinerFilter wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = WeinerFilter_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on button press in btnWiener.
function btnWiener_Callback(hObject, eventdata, handles)
% hObject    handle to btnWiener (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
    %获取数据
    pInfo = getappdata(handles.figure1,'mydata');
    x=pInfo.pData;
    s=pInfo.pDataS;
    M=length(x);
    
    N=str2num(get(handles.edLengthFilter,'string'));
    fNoiseM=str2num(get(handles.edNoiseM,'string'));
    
    % 指定输出
    axes(handles.axesOut);
    
    %自相关矩阵 %自相关矩阵R
    Re=zeros(1,M);
    for i=1:N
        for j=1:M
            if j+i-1<=M
                Re(1,i)=x(1,j)*x(1,j+i-1)'/(M-i+1)+Re(1,i);
            end
        end
    end
    R=zeros(N,N);            
    for i=1:N
        for j=i:N
            if(i==j)
                R(i,i)=Re(1,1);
            else
                R(i,j)=Re(1,j-i+1);
                R(j,i)=conj(R(i,j));
            end
        end
    end  
    %互相关矩阵 r
    r=zeros(1,N);             
    for i=1:N
        for j=1:M
            if j-i+1>0
                r(1,i)=x(1,j)*s(1,j-i+1)'/(M-i+1)+r(1,i);
            end
        end
    end
    
    Wopt=inv(R)*r';           %最优抽头权向量

    X=zeros(1,M);             %滤波器输出
    for n1=1:M
        if n1<N
                for i=0:n1-1
                    X(1,n1)=Wopt(i+1,1)*x(1,n1-i)+X(1,n1);
                end
        else
                for i=0:N-1
                    X(1,n1)=Wopt(i+1,1)*x(n1-i)+X(1,n1);
                end
        end
    end
%     %%去延迟
%     for j=1:M
%         if(j>=M-iDelay-iDelay)
%             XX(1,j)=0;
%         else
%             XX(1,j)=X(1,j+iDelay+iDelay);
%         end
%     end
    
    hold off
    plot(s,'.-k','linewidth',2);hold on
    plot(x,'.-b');
    hold on
    plot(X,'*-r','linewidth',2);
    hold off
    legend('原信号','噪声信号','滤波信号')

%%
% --- Executes on selection change in listSignal.
function listSignal_Callback(hObject, eventdata, handles)
% hObject    handle to listSignal (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns listSignal contents as cell array
%        contents{get(hObject,'Value')} returns selected item from listSignal


% --- Executes during object creation, after setting all properties.
function listSignal_CreateFcn(hObject, eventdata, handles)
% hObject    handle to listSignal (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: listbox controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
function edLengthSignal_Callback(hObject, eventdata, handles)
% hObject    handle to edLengthSignal (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edLengthSignal as text
%        str2double(get(hObject,'String')) returns contents of edLengthSignal as a double

% --- Executes during object creation, after setting all properties.
function edLengthSignal_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edLengthSignal (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

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三、运行结果

四、备注