基于某某matlab地码型转换

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1、word实验内容：利用Matlab软件的GUI界面编程，做一个简单的界面，通过此界面调用相关的程序去实现由抽样判决后的AMI码型、CMI码型和HDB3码型数字序列恢复出原始的PCM脉冲编码信号。实验目的：1,熟悉Matlab的GUI的编程操作，学会运用GUI来建立一个界面2.掌握AMI,CMI,HDB3码型的特点和意义，学会将PCM脉冲编码信号转化为AMI,CMI,HDB3的编码以与AMI,CMI,HDB3解码的方式。实验方法：实验中采用的方法是先建立大概的界面，其中包括输入框、按钮、提示内容与坐标系等。然后再对各种组件设置好属性，并对各个组件编写回调函数，最后进展调试验证饥渴。实验代码：1.

2、 AMI码型转换： % 编码 %p = -1;for i=1:length(f); if f(i)=1 e(i) = (-1)*p; p = e(i); else e(i) = f(i); endend% 译码 %for i=1:length(f); if e(i)=0 l(i) = 1; else e(i) = 0; endend编码：代码中的f代表着输入字符串转化后的ASCII码，用变量p来实现原信号中1的正负交替。例如，f1=1，如此e1=1，p=1；f2=1，如此e2=-1，p=-1。如此就可以得到正负1交替了。译码：当ei不等于0，就把结果等于1。2. CMI码型转换 % 编码 %m

3、=1;p=-1; for i=1:length(f) if(f(i)=1&m=1) s(i)=3; m=m*p; else if(f(i)=1&m=-1) s(i)=0; m=m*p; else s(i)=1; endend end k=dec2bin(s,2); l=k; x=l(:); y=x; n=str2num(y(1);for i=2:length(y) n=n str2num(y(i);end% 译码 % if n(1)=0 if n(2)=1 cm=0; else cm=1; end else cm=1; endr=3;while rlength(n) if n(r)=0 if

4、n(r+1)=1 cm=cm 0; else cm=cm 1; end else cm=cm 1; end r=r+2;end3. HDB3码型转换 % 编码 %yn=xn;% 输出yn初始化num=0;% 计数器初始化for k=1:length(xn) if xn(k)=1 num=num+1; % 1计数器 if num/2 = fix(num/2) % 奇数个1时输出-1,进展极性交替 yn(k)=1; else yn(k)=-1; end endend % HDB3编码num=0; % 连零计数器初始化yh=yn; % 输出初始化sign=0; % 极性标志初始化为0V=zeros(

5、1,length(yn);% V脉冲位置记录变量 B=zeros(1,length(yn);% B脉冲位置记录变量for k=1:length(yn) if yn(k)=0 num=num+1; % 连“0个数计数 if num=4 % 如果4连“0 num=0; % 计数器清零 yh(k)=1*yh(k-4); % 让0000的最后一个0改变为与前一个非零符号一样极性的符号 V(k)=yh(k); % V脉冲位置记录 if yh(k)=sign % 如果当前V符号与前一个V符号的极性一样 yh(k)=-1*yh(k); % 如此让当前V符号极性反转,以满足V符号间相互极性反转要求 yh(k-

6、3)=yh(k); % 添加B符号,与V符号同极性 B(k-3)=yh(k); % B脉冲位置记录 V(k)=yh(k); % V脉冲位置记录 yh(k+1:length(yn)=-1*yh(k+1:length(yn); % 并让后面的非零符号从V符号开始再交替变化 end sign=yh(k); % 记录前一个V符号的极性 end else num=0; % 当前输入为“1如此连“0计数器清零 endend % 译码 %input=yh; % HDB3码输入decode=input; % 输出初始化sign=0; % 极性标志初始化for k=1:length(yh) if input(k

7、) = 0 if sign=yh(k) % 如果当前码与前一个非零码的极性一样 decode(k-3:k)=0 0 0 0;% 如此该码判为V码并将*00V清零 end sign=input(k); % 极性标志 endenddecode=abs(decode); % 整流实验现象：总体界面：AMI：CMI：HDB3：总结：1. 本次实验中因为对画方波不太熟悉，在使用stairs函数时，方波图总是在最后少了一位，后来经查询后才知道stairs的正确用法。2. 由于对GUI界面设置的不熟悉，很多细节都没做到位，界面的美观有待提高。3. 在编代码是经常没有写注释，导致后来有些变量混淆了。附录：全部

8、代码function varargout = untitled1(varargin)% UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing% singleton*.% H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to% the existing singleton*.% UNTITLED1(CALLBACK,hObject,eventData,handles,.) calls the local% function nam

9、ed CALLBACK in UNTITLED1.M with the given input arguments.% UNTITLED1(Property,Value,.) creates a new UNTITLED1 or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before untitled1_OpeningFunction gets called. An% unrecognized property name or inv

10、alid value makes property application% stop. All inputs are passed to untitled1_OpeningF via varargin.% *See GUI Options on GUIDEs 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 untitled1%

11、 Last Modified by GUIDE v2.5 21-Dec-2014 19:55:20% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct(gui_Name, mfilename, .gui_Singleton, gui_Singleton, .gui_OpeningF, untitled1_OpeningF, .gui_OutputF, untitled1_OutputF, .gui_LayoutF, , .gui_Callback, );if nargin & ischar(v

12、arargin1) gui_State.gui_Callback = str2func(varargin1);endif nargout varargout1:nargout = gui_mainf(gui_State, varargin:);else gui_mainf(gui_State, varargin:);end% End initialization code - DO NOT EDIT% - Executes just before untitled1 is made visible.function untitled1_OpeningF(hObject, eventdata,

13、handles, varargin)% This function has no output args, see OutputF.% 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 mand line arguments to untitled1 (see VARARGIN)% Choose default mand li

14、ne output for untitled1handles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes untitled1 wait for user response (see UIRESUME)% uiwait(handles.maxing);% - Outputs from this function are returned to the mand line.function varargout = untitled1_OutputF(hObject, even

15、tdata, 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 mand line output from handles structurevarargout1 = h

16、andles.output;function edit_Callback(hObject, eventdata, handles)% hObject handle to edit (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 edit as text% str2double(

17、get(hObject,String) returns contents of edit as a double% - Executes during object creation, after setting all properties.function edit_CreateF(hObject, eventdata, handles)% hObject handle to edit (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles n

18、ot created until after all CreateFs called% Hint: edit controls usually have a white background on Windows.% See ISPC and PUTER.if ispc & isequal(get(hObject,BackgroundColor), get(0,defaultUicontrolBackgroundColor) set(hObject,BackgroundColor,white);end% - Executes on button press in ami.function am

19、i_Callback(hObject, eventdata, handles)user_string=get(handles.edit,string);a=dec2bin(user_string,8);b=a;c=b(:);d=c;f=str2num(d(1);for i=2:length(d) f=f str2num(d(i);endf=f 0;% %p = -1;for i=1:length(f);if f(i)=1 e(i) = (-1)*p; p = e(i);else e(i) = f(i);endend% %for i=1:length(f);if e(i)=0 l(i) = 1;

20、else e(i) = 0;endendaxes(handles.axes1)t=1:length(f);stairs(t-1,f)axis(0 length(f) -2 2)xlabel(ASCII);grid minor;axes(handles.axes2)t=1:length(e);stairs(t-1,e)axis(0 length(e) -2 2)xlabel(AMI );grid minor;axes(handles.axes3)t=1:length(l);stairs(t-1,l)axis(0 length(l) -2 2)xlabel(AMI );grid minor;% h

21、Object handle to ami (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% - Executes on button press in cmi.function cmi_Callback(hObject, eventdata, handles)user_string=get(handles.edit,string);a=dec2bin(user_strin

22、g,8);b=a;c=b(:);d=c;f=str2num(d(1);for i=2:length(d) f=f str2num(d(i);endf=f 0;% %m=1;p=-1;for i=1:length(f)if(f(i)=1&m=1) s(i)=3; m=m*p;elseif(f(i)=1&m=-1) s(i)=0; m=m*p;else s(i)=1;endendend k=dec2bin(s,2); l=k; x=l(:); y=x; n=str2num(y(1);for i=2:length(y) n=n str2num(y(i);end% %if n(1)=0if n(2)=

23、1 cm=0;else cm=1;endelse cm=1;endr=3;while rlength(n)if n(r)=0if n(r+1)=1 cm=cm 0;else cm=cm 1;endelse cm=cm 1;end r=r+2;endaxes(handles.axes1)t=1:length(f);stairs(t-1,f)axis(0 length(f) -2 2)xlabel(ASCII);grid minor;axes(handles.axes2)t=1:length(n);stairs(t-1,n)axis(0 length(n) -2 2)xlabel(CMI );gr

24、id minor;axes(handles.axes3)t=1:length(cm);stairs(t-1,cm)axis(0 length(cm) -2 2)xlabel(CMI );grid minor;% hObject handle to cmi (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% - Executes on button press in hdb3

25、.function hdb3_Callback(hObject, eventdata, handles)user_string=get(handles.edit,string);a=dec2bin(user_string,8);b=a;b=a;c=b(:);d=c;xn=str2num(d(1);for i=2:length(d) xn=xn str2num(d(i);endxn=xn 0;% %yn=xn;% ynnum=0;% for k=1:length(xn)if xn(k)=1 num=num+1; % 1if num/2 = fix(num/2) % 1-1, yn(k)=1;el

26、se yn(k)=-1;endendend% HDB3num=0; % yh=yn; % sign=0; % 0V=zeros(1,length(yn);% V B=zeros(1,length(yn);% Bfor k=1:length(yn)if yn(k)=0 num=num+1; % 0if num=4 % 40 num=0; % yh(k)=1*yh(k-4); % 00000 V(k)=yh(k); % Vif yh(k)=sign % VV yh(k)=-1*yh(k); % V,V yh(k-3)=yh(k); % B,V B(k-3)=yh(k); % B V(k)=yh(k

27、); % V yh(k+1:length(yn)=-1*yh(k+1:length(yn);% Vend sign=yh(k); % Vendelse num=0; % 10endend% %input=yh; % HDB3decode=input; % sign=0; % for k=1:length(yh)if input(k) = 0if sign=yh(k) % decode(k-3:k)=0 0 0 0;% V*00Vend sign=input(k); % endenddecode=abs(decode); % axes(handles.axes1)t=1:length(xn);s

28、tairs(t-1,xn)axis(0 length(xn) -2 2)xlabel(ASCII);grid minor;axes(handles.axes2)t=1:length(yh);stairs(t-1,yh)axis(0 length(yh) -2 2)xlabel(HDB3 );grid minor;axes(handles.axes3)t=1:length(decode);stairs(t-1,decode)axis(0 length(decode) -2 2)xlabel(HDB3 );grid minor;% hObject handle to hdb3 (see GCBO)

29、% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% - Executes when plent is resized.function plent_ResizeF(hObject, eventdata, handles)% hObject handle to plent (see GCBO)% eventdata reserved - to be defined in a future ver

30、sion of MATLAB% handles structure with handles and user data (see GUIDATA)% -function plent_ButtonDownF(hObject, eventdata, handles)% hObject handle to plent (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% - Executes during object creation, after setting all properties.function plent_CreateF(hObject, eventdata, handles)% hObject handle to plent (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFs called文案大全