²é¿´: 2551  |  »Ø¸´: 3

xiaojixiong

½ð³æ (СÓÐÃûÆø)

[ÇóÖú] ¡¾ÇóÖú¡¿Çë½Ì¸÷λ´óÅ££¬ÈçºÎ°ÑÒ»¸öʱÓòÐźŲ¨ÐνøÐÐʱƵ·ÖÎö£¬¿´ËüµÄʱƵͼ£¿

ÈçÌ⣬ÎÒÏÖÔÚÓÐÒ»¸öÓÃ¿í´øÊ¾²¨Æ÷²âµÃµÄʱÓòÐźŲ¨ÐΣ¬ÆµÆ×·¶Î§ÔÚ¼¸¸öGHz×óÓÒ£¬ÎÒÏë¶ÔÕâ¸öÐźÅ×÷¸öʱƵ·ÖÎö£¬¿´¿´ÆµÂÊËæÊ±¼äÊÇÈçºÎ±ä»¯µÄ£¬ÇëÎÊÈç¹ûÓöÌʱ¸µÁ¢Ò¶±ä»»£¨»òС²¨±ä»»Ò²¿É£©Ôõô±à³Ì£¬Ôõô×ö£¿¶ÔMatlab»ù±¾¿É˵ÊÇÎÄ䣬¾´Çë´ó¼ÒÖ¸µã£¡
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hongjade

½ð³æ (³õÈëÎÄ̳)

¶¥Ò»Ï£¬×î½üÒ²ÔÚŬÁ¦½â¾öÕâ¸öÎÊÌâ
¹ö¹ö³¤½­¶«ÊÅË®£¬¹ß¿´ÇïÔ´º·ç
2Â¥2012-07-24 12:16:50
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÔÁÓï²ÐƬ

Í­³æ (СÓÐÃûÆø)

ͬµÈ´ý
3Â¥2012-11-05 10:02:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÔÁÓï²ÐƬ

Í­³æ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï
xiaojixiong: ½ð±Ò+2, ¡ïÓаïÖú 2012-11-05 21:02:52
ÓиöÀý×Ó£¬Ó¦¸ÃÓаïÖú°É¡£

fs=1024;                          %²ÉÑùƵÂÊ
     f1=100;                        
     f2=200;
     t=0:1/fs:1;
     s=sin(2*pi*f1*t)+sin(2*pi*f2*t);  %Á½¸ö²»Í¬ÆµÂÊÕýÏÒÐźźϳɵķÂÕæÐźÅ
     %%%%%%%%%%%%%%%%%С²¨Ê±ÆµÍ¼»æÖÆ%%%%%%%%%%%%%%%%%%
     wavename='cmor3-3';
     totalscal=256;                    %³ß¶ÈÐòÁеij¤¶È£¬¼´scalµÄ³¤¶È
     wcf=centfrq(wavename);            %С²¨µÄÖÐÐÄÆµÂÊ
     cparam=2*wcf*totalscal;           %ΪµÃµ½ºÏÊʵij߶ÈËùÇó³öµÄ²ÎÊý
     a=totalscal:-1:1;  
     scal=cparam./a;                   %µÃµ½¸÷¸ö³ß¶È£¬ÒÔʹת»»µÃµ½ÆµÂÊÐòÁÐΪµÈ²îÐòÁÐ
     coefs=cwt(s,scal,wavename);       %µÃµ½Ð¡²¨ÏµÊý
     f=scal2frq(scal,wavename,1/fs);   %½«³ß¶Èת»»ÎªÆµÂÊ
     imagesc(t,f,abs(coefs));          %»æÖÆÉ«Æ×ͼ
     colorbar;
     xlabel('ʱ¼ä t/s');
     ylabel('ƵÂÊ f/Hz');
     title('С²¨Ê±ÆµÍ¼');


˵Ã÷£º(1)Ó¦ÓÃʱֻÐë¸Ä±äwavenameºÍtotalscalÁ½¸ö²ÎÊý¼´¿É¡£
          (2)ÔÚÕâ¸öÀý×ÓÖУ¬×îºÃÑ¡Óø´µÄmorletС²¨£¬ÆäËüС²¨µÄ·ÖÎöЧ¹û²»ºÃ£¬¶øÇÒmorletС²¨µÄ´ø¿í²ÎÊýºÍÖÐÐÄÆµÂÊÈ¡µÃÔ½´ó£¬Ê±ÆµÍ¼ÉÏ·´Ó³µÄʱƵ¾Û¼¯ÐÔÔ½ºÃ¡£
4Â¥2012-11-05 10:04:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ xiaojixiong µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[»ù½ðÉêÇë] ÔÚ¼á±ù»¹¸Ç×ű±º£µÄʱºò£¬ÎÒ¿´µ½ÁËÅ­·ÅµÄ÷»¨¡£ +3 ziyangfang 2026-08-25 3/150 2026-08-25 13:14 by huagongfeihu
[»ù½ðÉêÇë] ÈËÆø²»ÐÐÁË +11 fansofjerry 2026-08-21 11/550 2026-08-25 11:04 by ¹Â¶ÀµÄÓ¢ÐÛ6
[»ù½ðÉêÇë] 2026¹ú×ÔÈ»º¯ÆÀ·Ñµ½ÕË +19 ÑòÑü°å 2026-08-21 22/1100 2026-08-25 10:38 by popular289
[½Ìʦ֮¼Ò] µ¼Ê¦Í²ۣºÎÒÔõô̯ÉÏÁËÕâô¸ö¼«Æ·Ñо¿Éú£¡ +3 ËÕ¶«ÆÂ¶þÊÀ 2026-08-23 3/150 2026-08-25 10:35 by shisan1313
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +5 process2012 2026-08-23 7/350 2026-08-25 09:42 by huixian257
[»ù½ðÉêÇë] ½ñÌì»ù½ð»á³ö½á¹ûÂð£¿20260819 +17 kkkl_v 2026-08-19 18/900 2026-08-25 09:41 by windflowerwy
[»ù½ðÉêÇë] ÎÒÃæÉÏÍêµ°ÁË +13 ÇÒÌý»¢Ð¥ 2026-08-20 14/700 2026-08-25 09:10 by mrkang
[»ù½ðÉêÇë] Ö»ÓÐÿÄêÕâÖÖʱºòÀ´¹ä¹äСľ³æ +25 yaoyewhu2008 2026-08-20 27/1350 2026-08-25 08:01 by Equinoxhua
[»ù½ðÉêÇë] Ã÷ÌìÓ¦¸Ã¿É²éÁË£¡£¿ +5 chengyan1220 2026-08-23 5/250 2026-08-24 23:28 by ÎÒ4´ó°×²Ë
[»ù½ðÉêÇë] filecode£¬4¸öjtjcÁË +14 ziyangfang 2026-08-19 17/850 2026-08-24 18:37 by ¹þ¹þ¸ò£¿
[»ù½ðÉêÇë] ½¨Òé»ù½ð·¢²¼Ìáǰ¸ø³öÃ÷È·µÄʱ¼äµã +13 kulium 2026-08-21 16/800 2026-08-24 16:27 by superceng
[»ù½ðÉêÇë] ½ñÈÕ²»·Å°ñ£¿Íø´«¹ú×ÔȻԤ¼Æ 8 Ô 27 Èտɲé½á¹û +17 ҽѧÀÏÄк¢ 2026-08-20 21/1050 2026-08-24 14:21 by refreshing11
[»ù½ðÉêÇë] ÈÃÎÒÖÐÒ»¸öÃæÉϰɣ¡ +13 ´óƼ1987 2026-08-20 16/800 2026-08-24 10:23 by ̫ɵÁË
[»ù½ðÉêÇë] ·Å°ñǰµÄ²»µ­¶¨ 20+4 snowwithsea 2026-08-19 17/850 2026-08-24 10:20 by echo8914667
[»ù½ðÉêÇë] ¿ÆÑй¶ùÌ«ÄÑÁË +18 ÎÒ4´ó°×²Ë 2026-08-20 19/950 2026-08-24 09:47 by ¿­¶÷¹ãÊ¢´ß»¯·ÖÎ
[»ù½ðÉêÇë] ʲôʱºò¿ª½±£¿ +10 CrisMessi 2026-08-18 11/550 2026-08-24 06:50 by ¿ªÐĵÄСʨ×Ó
[»ù½ðÉêÇë] ¿´À´½ñÌì²»»á·Å°ñÁË£¿ +8 chengyan1220 2026-08-21 11/550 2026-08-21 17:52 by dcqxinyang
[»ù½ðÉêÇë] ʱ¼ä´ÁÓÖ±äÁË +13 wuchongjun 2026-08-20 19/950 2026-08-21 17:21 by ×Ïɼ´¼
[»ù½ðÉêÇë] Ó¦¸ÃÊÇÏÂÖÜÈý26ÈÕ¹«²¼Á˰ɣ¿ +4 ¹þ¹þ¸ò£¿ 2026-08-21 4/200 2026-08-21 10:58 by Vivilian
[»ù½ðÉêÇë] Ã÷Ìì·Å°ñ£¿ +5 Shxjjxjkx 2026-08-18 5/250 2026-08-18 18:14 by -´ó´ó´ó´ó´ó-
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û