【正文】
信號(hào),為了方便觀察,對(duì)U1,U2,U3進(jìn)行快速傅立葉變換,并繪制圖像。根據(jù)調(diào)制的定義,振幅調(diào)制信號(hào)(已調(diào))一般可表示為: Sm(t)=Am(t)cosωct設(shè)調(diào)制信號(hào)m(t)的頻譜為M(ω),則已調(diào)信號(hào)的頻譜為:Sm(ω)=A2Mω+ωcc+M(ωωc)2調(diào)幅電路方案分析標(biāo)準(zhǔn)調(diào)幅波(AM)產(chǎn)生原理調(diào)制信號(hào)是只來(lái)來(lái)自信源的調(diào)制信號(hào)(基帶信號(hào))這些信號(hào)可以是模擬的,亦可以是數(shù)字的。這里高頻振蕩波就是攜帶信號(hào)的運(yùn)載工具,也叫載波。 t=0::。axis([0,100,0,100000])。subplot(3,2,6)。 u2=U2m.*cos((w2).*t)。zaiboxinhao39。title(39。 figure。Y2=fft(u2)。plot(t,u4)title(39。我不知道年少輕狂,我只知道勝者為王。但在實(shí)際操作中遇到了困難,即無(wú)法輸入無(wú)限多諧波信號(hào),故采用了固定的兩個(gè)分量來(lái)模擬本次實(shí)驗(yàn)。title(39。plot(t,u2)title(39。u1=U11m.*cos((w11).*t)。)。)。 U2m=2。subplot(3,2,5)。 plot(abs(Y1))。 w2=1000*pi。關(guān)鍵詞:振幅調(diào)制;MATLABAbstractBased on the basic circuit and working principle of amplitude modulation circuit analysis, established the mathematical model of the amplitude modulation circuit, performance is studied by using the MATLAB simulation and analysis, code used in the simulation are given, so as to promote the understanding and application of amplitude modulation circuit skills.Key word