fm調(diào)制與解調(diào)系統(tǒng)課程設(shè)計報告-在線瀏覽
2025-03-07 20:20本頁面
【正文】 onsubplot(2,2,4)plot(f(1:N/2),abs(VOP(1:N/2)))。頻域調(diào)制PM信號39。Hz39。%采樣間隔fs=1/T。%采樣點數(shù)n=0:N1。kf=pi/2。%調(diào)相比例常數(shù)vx=square(2*pi*10*t,50)。%調(diào)制信號vc=cos(2*pi*100*t)。%對調(diào)頻FM信號延時,*pi的恒定相移vf1=cos(2*pi*100*()+2*pi*kf*25*sawtooth(2*pi*()*10,)pi/10)。%給調(diào)相信號加上pi/2的固定相移vip=vc.*vp1。%通過相乘器b=fir1(80,)。vof=filter(b1,1,vip)。VOF=fft(vof,N)。f=n*fs/N。title(39。)axis([0,300,])grid onVX=fft(vx,N)。title(39。)xlabel(39。)grid onsubplot(2,2,3)plot(vof)。時域解調(diào)FM信號39。title(39。)grid onfigure(2)subplot(2,2,1)plot(vx)。時域調(diào)制信號39。subplot(2,2,2)plot(f(1:N/2),abs(VX(1:N/2)))。頻域調(diào)制信號39。Hz39。title(39。)axis([0,300,])grid onsubplot(2,2,4)plot(f(1:N/2),abs(VOP(1:N/2)))。頻域調(diào)制PM信號39。⑶運行結(jié)果：①正弦波：示波器（從上到下一次是：調(diào)制信號、調(diào)頻信號、解調(diào)信號）：調(diào)制信號頻譜:調(diào)頻信號頻譜：解調(diào)信號頻譜：②方波:示波器（從上到下一次是：調(diào)制信號、調(diào)頻信號、解調(diào)信號）：調(diào)頻信號頻譜:解調(diào)信號頻譜：調(diào)制信號頻譜：⒉PM的調(diào)制和解調(diào)⑴系統(tǒng)方框圖：⑵參數(shù)設(shè)置：①正弦波：②方波：僅改變signal generator的參數(shù)設(shè)置如下，其余參數(shù)設(shè)置與正弦波時相同：⑶運行結(jié)果：①正弦波：示波器（從上到下一次是：調(diào)制信號、調(diào)相信號、解調(diào)信號）：調(diào)相信號頻譜：調(diào)制信號頻譜： 解調(diào)信號頻譜：②方波：示波器（從上到下一次是：調(diào)制信號、調(diào)相信號、解調(diào)信號）：調(diào)相信號頻譜：調(diào)制信號頻譜：調(diào)制信號頻譜：解調(diào)信號頻譜：⒊結(jié)果分析：㈢Labview仿真⒈PM調(diào)制⑴前面板：⑵程序框圖：⑶參數(shù)設(shè)置及運行結(jié)果：⒉FM調(diào)制⑴前面板：⑵程序框圖：⑶參數(shù)設(shè)置及運行結(jié)果：⒊結(jié)果分析㈣GUI設(shè)計圖形用戶界面⒈程序代碼：function varargout = jiaodu_tiaozhiANDjietiao(varargin)% JIAODU_TIAOZHIANDJIETIAO Mfile for % JIAODU_TIAOZHIANDJIETIAO, by itself, creates a new JIAODU_TIAOZHIANDJIETIAO or raises the existing% singleton*.%% H = JIAODU_TIAOZHIANDJIETIAO returns the handle to a new JIAODU_TIAOZHIANDJIETIAO or the handle to% the existing singleton*.%% JIAODU_TIAOZHIANDJIETIAO(39。,hObject,eventData,handles,...) calls the local% function named CALLBACK in with the given input arguments.%% JIAODU_TIAOZHIANDJIETIAO(39。,39。,...) creates a new JIAODU_TIAOZHIANDJIETIAO or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before jiaodu_tiaozhiANDjietiao_OpeningF gets called. An% unrecognized property name or invalid value makes property application% stop. All inputs are passed to jiaodu_tiaozhiANDjietiao_OpeningF via varargin.%% *See GUI Options on GUIDE39。gui_State = struct(39。, mfilename, ... 39。, gui_Singleton, ... 39。, jiaodu_tiaozhiANDjietiao_OpeningF, ... 39。, jiaodu_tiaozhiANDjietiao_OutputF, ... 39。, [] , ... 39。, [])。amp。endif nargout [varargout{1:nargout}] = gui_mainf(gui_State, varargin{:})。end% End initialization code DO NOT EDIT% Executes just before jiaodu_tiaozhiANDjietiao is made visible.function jiaodu_tiaozhiANDjietiao_OpeningF(hObject, eventdata, 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 jiaodu_tiaozhiANDjietiao (see VARARGIN)% Choose default mand line output for jiaodu_tiaozhiANDjietiao = hObject。% UIWAIT makes jiaodu_tiaozhiANDjietiao wait for user response (see UIRESUME)% uiwait()。% 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 structurevarargout{1} = 。%采樣間隔fs=1/T。%采樣點數(shù)n=0:N1。f=n*fs
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