實驗1 常用信號分析 答案

1、實驗實驗1常用信號產(chǎn)生常用信號產(chǎn)生實驗?zāi)康模簩嶒災(zāi)康模簩W(xué)習(xí)用MATLAB編程產(chǎn)生各種常見信號。實驗內(nèi)容：實驗內(nèi)容：1、矩陣操作：輸入矩陣：x=[1324531236587674]x=1324531236587674引用x的第二、三行；x([23]:)ans=53123658引用x的第三、四列；x(:[34])ans=24125874求矩陣的轉(zhuǎn)置；xans=1537336621574284求矩陣的逆；y=inv(x)y=1.25000.2

2、5000.62500.12503.41670.08331.87500.37500.75000.25000.37500.12501.62500.12501.06250.31252、單位脈沖序列：產(chǎn)生δ（n）函數(shù)；n=8:8x=[zeros(18)1zeros(18)]stem(nx)產(chǎn)生δ（n5）函數(shù)；n=8:8x=[zeros(113)1zeros(13)]stem(nx)86420246800.10.20.30.40.50.60.70

3、.80.91δ（n）86420246800.10.20.30.40.50.60.70.80.91δ（n5）3、產(chǎn)生階躍序列：產(chǎn)生U（n）序列；n=10:10x=[zeros(110)ones(111)]stem(nx)t=0:0.01:1plot(trn(1length(t)))00.10.20.30.40.50.60.70.80.912.521.510.500.511.522.58、生成一個幅度按指數(shù)衰減的正弦信號：x(t)=Asin

4、(wtphi).exp(at)A=8f0=4phi=0w=2pif0a=8t=0:0.01:1x=Asin(wtphi).exp(at)plot(tx)00.10.20.30.40.50.60.70.80.912101234569、產(chǎn)生三角波：t=3:0.01:3plot(ttripuls(t30))holdonplot(ttripuls(t5211))holdoffaxis([2402])210123400.20.40.60.811.