clear?close?all
T?=?2;??dt?=?0.00001;??t?=?-2:dt:2;
x1?=?u（t）?-?u（t-1-dt）;??x?=?0;
for?m?=?-1:1???????????????????%?Periodically?extend?x1（t）?to?form?a?periodic?signal
????x?=?x?+?u（t-m*T）?-?u（t-1-m*T-dt）;
end
w0?=?2*pi/T;
N?=?10;???????????????????????%?The?number?of?the?harmonic?components
L?=?2*N+1;
for?k?=?-N:?N;??????????????????%?Evaluate?the?Fourier?series?coefficients?ak
????ak（N+1+k）?=?（1/T）*x1*exp（-j*k*w0*t‘）*dt;
end
phi?=?angle（ak）;????????????????%?Evaluate?the?phase?of?ak
subplot（222）
k=-N:N;???stem（kabs（ak）‘k.‘）???title（‘The?amplitude?|ak|?of?x（t）‘）???axis（[-NN-0.10.6]）

subplot（224）
stem（kphi‘r.‘）???title（‘The?phase?phi（k）?of?x（t）‘）???axis（[-NN-22]）???xlabel（‘Index?k‘）

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????文件????????7215??2017-06-17?17:33??Q2_1.fig
?????文件?????????729??2017-06-17?17:32??Q2_1.m
?????文件????????1007??2017-07-01?09:39??Q2_2.m
?????文件?????7036471??2017-06-17?17:36??Q2_2_100.fig
?????文件?????6974826??2017-06-17?17:37??Q2_2_20.fig
?????文件?????6908846??2017-06-17?17:38??Q2_2_5.fig
?????文件?????7012002??2017-06-17?17:37??Q2_2_50.fig
?????文件?????????488??2017-07-01?10:07??Q2_3.m
?????文件?????????785??2017-07-01?10:03??Q2_4.m
?????文件??????????39??2017-07-01?12:40??Q2_5.m
?????文件????????1025??2017-07-01?10:04??Q2_6.m
?????文件????????1077??2017-07-01?10:05??Q2_7.m
?????文件?????1884218??2018-08-16?23:03??實(shí)驗(yàn)報(bào)告2連續(xù)時(shí)間信號(hào)的頻域分析.docx