%?Chapter?02:?Example?02.01:?Signal?Synthesis

%

figure（1）;?clf

%?a）?x（n）?=?2*delta（n+2）?-?delta（n-4）?-5<=n<=5

n?=?[-5:5];

x?=?2*impseq（-2-55）-impseq（4-55）;

subplot（221）;?stem（nx）;?title（‘Sequence?in?Example?2.1a‘）

xlabel（‘n‘）;?ylabel（‘x（n）‘）;?axis（[-55-23]）

%

%?b）?x（n）?=?n[u（n）-u（n-10）]+10*exp（-0.3（n-10））（u（n-10）-u（n-20））;?0<=n<=20

n?=?[0:20];

x1?=?n.*（stepseq（0020）-stepseq（10020））;

x2?=?10*exp（-0.3*（n-10））.*（stepseq（10020）-stepseq（20020））;

x?=?x1+x2;

subplot（222）;stem（nx）;

title（‘Sequence?in?Example?2.1b‘）

xlabel（‘n‘）;ylabel（‘x（n）‘）;axis（[020-111]）

%

%?c）?x（n）?=?cos（0.04*pi*n）?+?0.2*w（n）;?0<=n<=50?w（n）:?Gaussian?（01）

n?=?[0:50];

x?=?cos（0.04*pi*n）+0.2*randn（size（n））;

subplot（223）;stem（nx）;title（‘Sequence?in?Example?2.1c‘）

xlabel（‘n‘）;ylabel（‘x（n）‘）;axis（[050-1.41.4]）

%

%?d）?x（n）?=?{...5432154321...};?-10<=n<=9

n=[-10:9];

x=[54321];

xtilde=x‘?*?ones（14）;

xtilde=（xtilde（:））‘;

subplot（224）;stem（nxtilde）;title（‘Sequence?in?Example?2.1d‘）

xlabel（‘n‘）;ylabel（‘xtilde（n）‘）;axis（[-109-16]）

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??1996-09-12?11:20??proakis\
?????目錄???????????0??1996-09-06?16:47??proakis\CHAP_02\
?????文件????????1081??1996-09-06?16:47??proakis\CHAP_02\ex020100.m
?????文件?????????816??1996-09-06?16:47??proakis\CHAP_02\ex020200.m
?????文件?????????465??1996-09-06?16:47??proakis\CHAP_02\ex020300.m
?????文件?????????477??1996-09-06?16:47??proakis\CHAP_02\ex020400.m
?????文件?????????764??1996-09-06?16:47??proakis\CHAP_02\ex020500.m
?????文件????????1163??1996-09-06?16:47??proakis\CHAP_02\ex020600.m
?????文件?????????223??1996-09-06?16:47??proakis\CHAP_02\ex020700.m
?????文件?????????192??1996-09-06?16:47??proakis\CHAP_02\ex020800.m
?????文件????????1191??1996-09-06?16:47??proakis\CHAP_02\ex020900.m
?????文件?????????475??1996-09-06?16:47??proakis\CHAP_02\ex021000.m
?????文件?????????328??1996-09-06?16:47??proakis\CHAP_02\ex021100.m
?????目錄???????????0??1996-09-06?16:47??proakis\CHAP_03\
?????文件?????????637??1996-09-06?16:47??proakis\CHAP_03\ex030300.m
?????文件?????????839??1996-09-06?16:47??proakis\CHAP_03\ex030400.m
?????文件?????????424??1996-09-06?16:47??proakis\CHAP_03\ex030500.m
?????文件?????????414??1996-09-06?16:47??proakis\CHAP_03\ex030600.m
?????文件?????????454??1996-09-06?16:47??proakis\CHAP_03\ex030700.m
?????文件?????????340??1996-09-06?16:47??proakis\CHAP_03\ex030800.m
?????文件?????????870??1996-09-06?16:47??proakis\CHAP_03\ex030900.m
?????文件?????????429??1996-09-06?16:47??proakis\CHAP_03\ex031000.m
?????文件?????????393??1996-09-06?16:47??proakis\CHAP_03\ex031100.m
?????文件????????1162??1996-09-06?16:47??proakis\CHAP_03\ex031200.m
?????文件?????????413??1996-09-06?16:47??proakis\CHAP_03\ex031300.m
?????文件?????????254??1996-09-06?16:47??proakis\CHAP_03\ex031500.m
?????文件?????????633??1996-09-06?16:47??proakis\CHAP_03\ex031600.m
?????文件?????????561??1996-09-06?16:47??proakis\CHAP_03\ex031700.m
?????文件?????????593??1996-09-06?16:47??proakis\CHAP_03\ex031800.m
?????文件?????????619??1996-09-06?16:47??proakis\CHAP_03\ex03180a.m
?????文件?????????614??1996-09-06?16:47??proakis\CHAP_03\ex03180b.m
............此處省略171個(gè)文件信息