{"id":37942,"date":"2023-09-22T14:40:06","date_gmt":"2023-09-22T06:40:06","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=37942"},"modified":"2023-09-22T14:40:11","modified_gmt":"2023-09-22T06:40:11","slug":"xddkhsjcssldgxssm","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/37942.html","title":{"rendered":"\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u7684\u5173\u7cfb\u662f\u4ec0\u4e48?"},"content":{"rendered":"\n

\u3000\u3000\u5728\u73b0\u4ee3\u901a\u4fe1\u9886\u57df\u4e2d\uff0c\u4fe1\u9053\u5e26\u5bbd<\/strong>\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387<\/strong>\u662f\u4e24\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\u3002\u4e86\u89e3\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u4e8e\u4f18\u5316\u7f51\u7edc\u6027\u80fd\u548c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u5b9e\u9645\u5e94\u7528\u7684\u793a\u4f8b\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u7684\u5b9a\u4e49<\/h2>\n\n\n\n

\u3000\u30001. \u4fe1\u9053\u5e26\u5bbd<\/strong>\uff1a\u4fe1\u9053\u5e26\u5bbd\u662f\u6307\u5728\u4e00\u4e2a\u7279\u5b9a\u7684\u9891\u7387\u8303\u56f4\u5185\uff0c\u80fd\u591f\u4f20\u8f93\u6570\u636e\u7684\u6700\u9ad8\u9891\u7387\u8303\u56f4\u3002\u5b83\u901a\u5e38\u4ee5\u8d6b\u5179(Hz)\u4e3a\u5355\u4f4d\u8868\u793a\uff0c\u8868\u793a\u4fe1\u9053\u80fd\u591f\u4f20\u8f93\u7684\u6700\u9ad8\u9891\u7387\u3002<\/p>\n\n\n\n

\u3000\u30002. \u6570\u636e\u4f20\u8f93\u901f\u7387<\/strong>\uff1a\u6570\u636e\u4f20\u8f93\u901f\u7387\u662f\u6307\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u4f20\u8f93\u7684\u6570\u636e\u91cf\u3002\u5b83\u901a\u5e38\u4ee5\u6bd4\u7279\u6bcf\u79d2(bps)\u6216\u5b57\u8282\u6bcf\u79d2(Bps)\u4e3a\u5355\u4f4d\u8868\u793a\uff0c\u8868\u793a\u6570\u636e\u5728\u4fe1\u9053\u4e2d\u4f20\u8f93\u7684\u901f\u7387\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u3000\u3000\u4e8c\u3001\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u7684\u5173\u7cfb<\/h2>\n\n\n\n

\u3000\u3000\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u5b58\u5728\u7d27\u5bc6\u7684\u5173\u7cfb\u3002\u4fe1\u9053\u5e26\u5bbd\u51b3\u5b9a\u4e86\u4fe1\u9053\u80fd\u591f\u4f20\u8f93\u7684\u6700\u9ad8\u9891\u7387\uff0c\u800c\u6570\u636e\u4f20\u8f93\u901f\u7387\u5219\u8868\u793a\u5728\u8be5\u9891\u7387\u8303\u56f4\u5185\u4f20\u8f93\u7684\u6570\u636e\u91cf\u3002\u4ee5\u4e0b\u662f\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\uff1a<\/p>\n\n\n\n

\u3000\u30001. \u7406\u8bba\u4e0a\u7684\u5173\u7cfb\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u6839\u636e\u9999\u519c\u5b9a\u7406(Shannon's theorem)\uff0c\u4fe1\u9053\u7684\u6700\u5927\u6570\u636e\u4f20\u8f93\u901f\u7387(C)\u4e0e\u4fe1\u9053\u7684\u5e26\u5bbd(B)\u548c\u4fe1\u566a\u6bd4(SNR)\u4e4b\u95f4\u5b58\u5728\u5982\u4e0b\u5173\u7cfb\uff1a<\/p>\n\n\n\n

\u3000\u3000C = B * log2(1 + SNR)<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0clog2\u8868\u793a\u4ee52\u4e3a\u5e95\u7684\u5bf9\u6570\u8fd0\u7b97\u3002\u8fd9\u4e2a\u516c\u5f0f\u8868\u660e\uff0c\u4fe1\u9053\u7684\u5e26\u5bbd\u548c\u4fe1\u566a\u6bd4\u8d8a\u9ad8\uff0c\u7406\u8bba\u4e0a\u7684\u6700\u5927\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e5f\u5c31\u8d8a\u9ad8\u3002<\/p>\n\n\n\n

\u3000\u30002. \u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u5173\u7cfb\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u53d7\u5230\u591a\u79cd\u56e0\u7d20\u7684\u5f71\u54cd\uff0c\u5982\u4fe1\u9053\u7684\u566a\u58f0\u5e72\u6270\u3001\u7f16\u7801\u65b9\u5f0f\u3001\u8c03\u5236\u65b9\u5f0f\u7b49\u3002\u5728\u76f8\u540c\u7684\u4fe1\u9053\u5e26\u5bbd\u4e0b\uff0c\u4e0d\u540c\u7684\u8c03\u5236\u65b9\u5f0f\u548c\u7f16\u7801\u65b9\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u4e0d\u540c\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u8c03\u5236\u65b9\u5f0f\u4e3aQAM(Quadrature Amplitude Modulation)\u7684\u8c03\u5236\u5668\u53ef\u4ee5\u5728\u76f8\u540c\u7684\u4fe1\u9053\u5e26\u5bbd\u4e0b\u5b9e\u73b0\u66f4\u9ad8\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e09\u3001\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u7684\u5f71\u54cd\u56e0\u7d20<\/h2>\n\n\n\n

\u3000\u30001. \u566a\u58f0\u5e72\u6270<\/strong>\uff1a\u566a\u58f0\u5e72\u6270\u662f\u6307\u5728\u4fe1\u9053\u4e2d\u5b58\u5728\u7684\u975e\u7406\u60f3\u4fe1\u53f7\u3002\u566a\u58f0\u5e72\u6270\u4f1a\u964d\u4f4e\u4fe1\u9053\u7684\u4fe1\u566a\u6bd4\uff0c\u4ece\u800c\u9650\u5236\u4e86\u6570\u636e\u4f20\u8f93\u901f\u7387\u7684\u63d0\u9ad8\u3002<\/p>\n\n\n\n

\u3000\u30002. \u7f16\u7801\u65b9\u5f0f<\/strong>\uff1a\u7f16\u7801\u65b9\u5f0f\u662f\u6307\u5c06\u539f\u59cb\u6570\u636e\u8f6c\u6362\u4e3a\u4f20\u8f93\u6570\u636e\u7684\u65b9\u5f0f\u3002\u4e0d\u540c\u7684\u7f16\u7801\u65b9\u5f0f\u5177\u6709\u4e0d\u540c\u7684\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u66f4\u9ad8\u7ea7\u7684\u7f16\u7801\u65b9\u5f0f\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/p>\n\n\n\n

\u3000\u30003. \u8c03\u5236\u65b9\u5f0f<\/strong>\uff1a\u8c03\u5236\u65b9\u5f0f\u662f\u6307\u5c06\u6570\u5b57\u4fe1\u53f7\u8f6c\u6362\u4e3a\u6a21\u62df\u4fe1\u53f7\u7684\u65b9\u5f0f\u3002\u4e0d\u540c\u7684\u8c03\u5236\u65b9\u5f0f\u5177\u6709\u4e0d\u540c\u7684\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u66f4\u9ad8\u9636\u7684\u8c03\u5236\u65b9\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/p>\n\n\n\n

\u3000\u3000\u56db\u3001\u5b9e\u9645\u5e94\u7528\u793a\u4f8b<\/h2>\n\n\n\n

\u3000\u30001. \u65e0\u7ebf\u901a\u4fe1<\/strong>\uff1a\u5728\u65e0\u7ebf\u901a\u4fe1\u4e2d\uff0c\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u4e8e\u4f18\u5316\u65e0\u7ebf\u7f51\u7edc\u6027\u80fd\u975e\u5e38\u91cd\u8981\u3002\u901a\u8fc7\u5408\u7406\u9009\u62e9\u8c03\u5236\u65b9\u5f0f\u548c\u7f16\u7801\u65b9\u5f0f\uff0c\u53ef\u4ee5\u63d0\u9ad8\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/p>\n\n\n\n

\u3000\u30002. \u5bbd\u5e26\u7f51\u7edc<\/strong>\uff1a\u5728\u5bbd\u5e26\u7f51\u7edc\u4e2d\uff0c\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u4e8e\u63d0\u4f9b\u9ad8\u901f\u4e92\u8054\u7f51\u63a5\u5165\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u63d0\u9ad8\u4fe1\u9053\u5e26\u5bbd\u548c\u4f7f\u7528\u5148\u8fdb\u7684\u8c03\u5236\u548c\u7f16\u7801\u6280\u672f\uff0c\u53ef\u4ee5\u63d0\u9ad8\u5bbd\u5e26\u7f51\u7edc\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/p>\n\n\n\n

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

\u3000\u3000\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u5b58\u5728\u5bc6\u5207\u7684\u5173\u7cfb\u3002\u4fe1\u9053\u5e26\u5bbd\u51b3\u5b9a\u4e86\u4fe1\u9053\u80fd\u591f\u4f20\u8f93\u7684\u6700\u9ad8\u9891\u7387\u8303\u56f4\uff0c\u800c\u6570\u636e\u4f20\u8f93\u901f\u7387\u8868\u793a\u5728\u8be5\u9891\u7387\u8303\u56f4\u5185\u4f20\u8f93\u7684\u6570\u636e\u91cf\u3002<\/strong>\u901a\u8fc7\u5408\u7406\u9009\u62e9\u8c03\u5236\u65b9\u5f0f\u548c\u7f16\u7801\u65b9\u5f0f\uff0c\u5e76\u4f18\u5316\u4fe1\u9053\u7684\u566a\u58f0\u5e72\u6270\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002\u4e86\u89e3\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u4e8e\u4f18\u5316\u7f51\u7edc\u6027\u80fd\u548c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u5177\u6709\u91cd\u8981\u610f\u4e49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728\u73b0\u4ee3\u901a\u4fe1\u9886\u57df\u4e2d\uff0c\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u662f\u4e24\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\u3002\u4e86\u89e3\u4fe1\u9053\u5e26\u5bbd\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u4e8e\u4f18\u5316\u7f51\u7edc\u6027\u80fd\u548c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u81f3\u5173\u91cd\u8981<\/p>\n","protected":false},"author":1,"featured_media":26593,"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":[275,183],"class_list":["post-37942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cssl","tag-xd"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/37942","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=37942"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/37942\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/26593"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=37942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=37942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=37942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}