{"id":87995,"date":"2024-01-29T17:25:44","date_gmt":"2024-01-29T09:25:44","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=87995"},"modified":"2024-01-29T17:25:50","modified_gmt":"2024-01-29T09:25:50","slug":"pyhsyzmzh","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/87995.html","title":{"rendered":"\u9891\u57df\u548c\u65f6\u57df\u600e\u4e48\u8f6c\u6362"},"content":{"rendered":"\n

\u3000\u3000\u5728\u4fe1\u53f7\u5904\u7406\u9886\u57df\u4e2d\uff0c\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362<\/strong>\u662f\u4e24\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\u3002\u9891\u57df\u8f6c\u6362\u53ef\u4ee5\u5c06\u4fe1\u53f7\u4ece\u65f6\u57df\u8f6c\u6362\u4e3a\u9891\u57df\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u5206\u6790\u4fe1\u53f7\u7684\u9891\u7387\u6210\u5206\u548c\u9891\u8c31\u7279\u6027\u3002\u800c\u65f6\u57df\u8f6c\u6362\u53ef\u4ee5\u5c06\u4fe1\u53f7\u4ece\u9891\u57df\u8f6c\u6362\u56de\u65f6\u57df\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u91cd\u65b0\u83b7\u5f97\u539f\u59cb\u4fe1\u53f7\u7684\u65f6\u95f4\u5e8f\u5217\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u7684\u6982\u5ff5\u3001\u539f\u7406\u4ee5\u53ca\u5e38\u7528\u7684\u8f6c\u6362\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001\u9891\u57df\u8f6c\u6362\u7684\u6982\u5ff5\u548c\u539f\u7406<\/h2>\n\n\n\n

\u3000\u3000\u9891\u57df\u8f6c\u6362\u662f\u5c06\u4fe1\u53f7\u4ece\u65f6\u57df\u8f6c\u6362\u4e3a\u9891\u57df\u7684\u8fc7\u7a0b\u3002\u5728\u9891\u57df\u4e2d\uff0c\u4fe1\u53f7\u7684\u8868\u793a\u65b9\u5f0f\u662f\u9891\u7387\u6210\u5206\u7684\u5206\u5e03\u60c5\u51b5\uff0c\u53ef\u4ee5\u901a\u8fc7\u9891\u8c31\u56fe\u6765\u5c55\u793a\u3002\u9891\u57df\u8f6c\u6362\u7684\u6838\u5fc3\u662f\u5085\u91cc\u53f6\u53d8\u6362\uff0c\u5b83\u53ef\u4ee5\u5c06\u4fe1\u53f7\u5206\u89e3\u4e3a\u4e00\u7cfb\u5217\u4e0d\u540c\u9891\u7387\u7684\u6b63\u5f26\u548c\u4f59\u5f26\u51fd\u6570\u3002\u5085\u91cc\u53f6\u53d8\u6362\u7684\u6570\u5b66\u8868\u8fbe\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000F(\u03c9) = \u222bf(t)e^(-j\u03c9t)dt<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cf(t)\u8868\u793a\u539f\u59cb\u4fe1\u53f7\uff0cF(\u03c9)\u8868\u793a\u9891\u57df\u4e2d\u7684\u9891\u8c31\uff0c\u03c9\u8868\u793a\u9891\u7387\u3002<\/strong>\u901a\u8fc7\u5085\u91cc\u53f6\u53d8\u6362\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u4fe1\u53f7\u5728\u9891\u57df\u4e2d\u7684\u9891\u8c31\u4fe1\u606f\uff0c\u4ece\u800c\u4e86\u89e3\u4fe1\u53f7\u7684\u9891\u7387\u6210\u5206\u548c\u80fd\u91cf\u5206\u5e03\u60c5\u51b5\u3002<\/p>\n\n\n\n

\u3000\u3000\u5e38\u7528\u7684\u9891\u57df\u8f6c\u6362\u65b9\u6cd5\u5305\u62ec\u79bb\u6563\u5085\u91cc\u53f6\u53d8\u6362(DFT)\u548c\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362(FFT)\u3002DFT\u662f\u4e00\u79cd\u5c06\u79bb\u6563\u65f6\u95f4\u57df\u4fe1\u53f7\u8f6c\u6362\u4e3a\u79bb\u6563\u9891\u7387\u57df\u4fe1\u53f7\u7684\u65b9\u6cd5\uff0c\u800cFFT\u662f\u4e00\u79cd\u9ad8\u6548\u5b9e\u73b0DFT\u7684\u7b97\u6cd5\u3002\u901a\u8fc7FFT\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u8ba1\u7b97\u5f97\u5230\u4fe1\u53f7\u7684\u9891\u8c31\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001\u65f6\u57df\u8f6c\u6362\u7684\u6982\u5ff5\u548c\u539f\u7406<\/h2>\n\n\n\n

\u3000\u3000\u65f6\u57df\u8f6c\u6362\u662f\u5c06\u4fe1\u53f7\u4ece\u9891\u57df\u8f6c\u6362\u56de\u65f6\u57df\u7684\u8fc7\u7a0b\u3002\u65f6\u57df\u4e2d\uff0c\u4fe1\u53f7\u7684\u8868\u793a\u65b9\u5f0f\u662f\u65f6\u95f4\u5e8f\u5217\u7684\u6ce2\u5f62\u56fe\uff0c\u53ef\u4ee5\u76f4\u89c2\u5730\u53cd\u6620\u4fe1\u53f7\u7684\u53d8\u5316\u60c5\u51b5\u3002\u65f6\u57df\u8f6c\u6362\u7684\u6838\u5fc3\u662f\u5085\u91cc\u53f6\u9006\u53d8\u6362\uff0c\u5b83\u53ef\u4ee5\u5c06\u4fe1\u53f7\u7684\u9891\u8c31\u91cd\u65b0\u5408\u6210\u4e3a\u539f\u59cb\u4fe1\u53f7\u3002\u5085\u91cc\u53f6\u9006\u53d8\u6362\u7684\u6570\u5b66\u8868\u8fbe\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000f(t) = \u222bF(\u03c9)e^(j\u03c9t)d\u03c9<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cF(\u03c9)\u8868\u793a\u9891\u57df\u4e2d\u7684\u9891\u8c31\uff0cf(t)\u8868\u793a\u65f6\u57df\u4e2d\u7684\u4fe1\u53f7\uff0ct\u8868\u793a\u65f6\u95f4\u3002<\/strong>\u901a\u8fc7\u5085\u91cc\u53f6\u9006\u53d8\u6362\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u9891\u57df\u4e2d\u6062\u590d\u51fa\u539f\u59cb\u4fe1\u53f7\u7684\u65f6\u95f4\u5e8f\u5217\u3002<\/p>\n\n\n\n

\u3000\u3000\u5e38\u7528\u7684\u65f6\u57df\u8f6c\u6362\u65b9\u6cd5\u5305\u62ec\u79bb\u6563\u5085\u91cc\u53f6\u9006\u53d8\u6362(IDFT)\u548c\u5feb\u901f\u5085\u91cc\u53f6\u9006\u53d8\u6362(IFFT)\u3002IDFT\u662f\u4e00\u79cd\u5c06\u79bb\u6563\u9891\u7387\u57df\u4fe1\u53f7\u8f6c\u6362\u4e3a\u79bb\u6563\u65f6\u95f4\u57df\u4fe1\u53f7\u7684\u65b9\u6cd5\uff0c\u800cIFFT\u662f\u4e00\u79cd\u9ad8\u6548\u5b9e\u73b0IDFT\u7684\u7b97\u6cd5\u3002\u901a\u8fc7IFFT\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u8ba1\u7b97\u5f97\u5230\u4fe1\u53f7\u7684\u65f6\u57df\u6ce2\u5f62\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e09\u3001\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u7684\u5e94\u7528<\/h2>\n\n\n\n

\u3000\u3000\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u5728\u4fe1\u53f7\u5904\u7406\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u9891\u57df\u8f6c\u6362\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5206\u6790\u4fe1\u53f7\u7684\u9891\u7387\u6210\u5206\u548c\u9891\u8c31\u7279\u6027\uff0c\u4ece\u800c\u5728\u97f3\u9891\u3001\u56fe\u50cf\u3001\u89c6\u9891\u7b49\u9886\u57df\u4e2d\u8fdb\u884c\u4fe1\u53f7\u5206\u6790\u548c\u5904\u7406\u3002\u4f8b\u5982\uff0c\u5728\u97f3\u9891\u5904\u7406\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u9891\u57df\u8f6c\u6362\u6765\u5b9e\u73b0\u5747\u8861\u5668\u3001\u6ee4\u6ce2\u5668\u548c\u97f3\u9891\u538b\u7f29\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n

\u3000\u3000\u65f6\u57df\u8f6c\u6362\u5219\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u8fd8\u539f\u4fe1\u53f7\u7684\u65f6\u95f4\u5e8f\u5217\uff0c\u4ece\u800c\u5728\u6570\u636e\u6062\u590d\u3001\u4fe1\u53f7\u91cd\u6784\u7b49\u9886\u57df\u4e2d\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u4f8b\u5982\uff0c\u5728\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u65f6\u57df\u8f6c\u6362\u6765\u8fd8\u539f\u63a5\u6536\u5230\u7684\u4fe1\u53f7\uff0c\u4ece\u800c\u5b9e\u73b0\u4fe1\u53f7\u89e3\u8c03\u548c\u6570\u636e\u6062\u590d\u3002<\/p>\n\n\n\n

\u3000\u3000\u7ed3\u8bba\uff1a<\/h2>\n\n\n\n

\u3000\u3000\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u662f\u4fe1\u53f7\u5904\u7406\u4e2d\u7684\u6838\u5fc3\u6982\u5ff5\uff0c\u901a\u8fc7\u9891\u57df\u8f6c\u6362\u6211\u4eec\u53ef\u4ee5\u5206\u6790\u4fe1\u53f7\u7684\u9891\u7387\u6210\u5206\u548c\u9891\u8c31\u7279\u6027\uff0c\u800c\u901a\u8fc7\u65f6\u57df\u8f6c\u6362\u6211\u4eec\u53ef\u4ee5\u8fd8\u539f\u4fe1\u53f7\u7684\u65f6\u95f4\u5e8f\u5217\u3002<\/strong>\u719f\u7ec3\u638c\u63e1\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u7684\u539f\u7406\u548c\u65b9\u6cd5\uff0c\u5bf9\u4e8e\u4fe1\u53f7\u5904\u7406\u9886\u57df\u7684\u5b66\u4e60\u548c\u5e94\u7528\u90fd\u81f3\u5173\u91cd\u8981\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u8bfb\u8005\u7406\u89e3\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u6709\u6240\u5e2e\u52a9\uff0c\u540c\u65f6\u4e5f\u80fd\u591f\u6fc0\u53d1\u8bfb\u8005\u5bf9\u4fe1\u53f7\u5904\u7406\u9886\u57df\u7684\u5174\u8da3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u9891\u57df\u548c\u65f6\u57df\u8f6c\u6362\u662f\u4fe1\u53f7\u5904\u7406\u4e2d\u7684\u6838\u5fc3\u6982\u5ff5\uff0c\u901a\u8fc7\u9891\u57df\u8f6c\u6362\u6211\u4eec\u53ef\u4ee5\u5206\u6790\u4fe1\u53f7\u7684\u9891\u7387\u6210\u5206\u548c\u9891\u8c31\u7279\u6027\uff0c\u800c\u901a\u8fc7\u65f6\u57df\u8f6c\u6362\u6211\u4eec\u53ef\u4ee5\u8fd8\u539f\u4fe1\u53f7\u7684\u65f6\u95f4\u5e8f\u5217\u3002<\/p>\n","protected":false},"author":1,"featured_media":65264,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[372],"class_list":["post-87995","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-spxh"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/87995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/comments?post=87995"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/87995\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/65264"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=87995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=87995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=87995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}