{"id":53977,"date":"2025-08-12T20:30:10","date_gmt":"2025-08-12T12:30:10","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53977.html"},"modified":"2025-08-12T20:30:10","modified_gmt":"2025-08-12T12:30:10","slug":"lms%e7%ae%97%e6%b3%95%e5%8e%9f%e7%90%86%e5%8f%8a%e5%9c%a8%e8%bd%ac%e5%ad%90%e4%b8%8d%e5%b9%b3%e8%a1%a1%e6%8e%a7%e5%88%b6%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%ef%bc%88%e9%99%84%e6%ba%90%e4%bb%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53977.html","title":{"rendered":"LMS\u7b97\u6cd5\u539f\u7406\u53ca\u5728\u8f6c\u5b50\u4e0d\u5e73\u8861\u63a7\u5236\u4e2d\u7684\u5e94\u7528\uff08\u9644\u6e90\u4ee3\u7801\uff09"},"content":{"rendered":"<p>LMS\uff08\u6700\u5c0f\u5747\u65b9\uff09\u7b97\u6cd5\u662f\u4e00\u79cd\u81ea\u9002\u5e94\u6ee4\u6ce2\u7b97\u6cd5\uff0c\u901a\u8fc7\u8fed\u4ee3\u8c03\u6574\u6ee4\u6ce2\u5668\u7cfb\u6570\u4ee5\u6700\u5c0f\u5316\u8f93\u51fa\u4fe1\u53f7\u7684\u5747\u65b9\u8bef\u5dee\u3002\u5728\u8f6c\u5b50\u4e0d\u5e73\u8861\u63a7\u5236\u4e2d\uff0c\u7528\u4e8e\u6ee4\u9664\u4e0e\u65cb\u8f6c\u9891\u7387\u540c\u9891\u7684\u5171\u632f\u4fe1\u53f7\u3002<\/p>\n<h5>\u4e00\u3001\u7b97\u6cd5\u539f\u7406<\/h5>\n<li>\n<p>\u6838\u5fc3\u65b9\u7a0b\uff1a<\/p>\n<ul>\n<li>\n<p>\u6ee4\u6ce2\u5668\u8f93\u51fa\uff1a<img decoding=\"async\" alt=\"$y(n) = \\\\mathbf{w}^T(n)\\\\mathbf{x}(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123006-689b33ceaf53f.png\"><\/p>\n<\/li>\n<li>\n<p>\u8bef\u5dee\u4fe1\u53f7\uff1a<img decoding=\"async\" alt=\"$e(n) = d(n) - y(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123007-689b33cf18d11.png\"><\/p>\n<\/li>\n<li>\n<p>\u6743\u503c\u66f4\u65b0\uff1a<img decoding=\"async\" alt=\"$\\\\mathbf{w}(n+1) = \\\\mathbf{w}(n) + \\\\mu \\\\cdot e(n) \\\\cdot \\\\mathbf{x}(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123007-689b33cf676f8.png\"><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5173\u952e\u53c2\u6570\uff1a<\/p>\n<ul>\n<li>\n<p><img decoding=\"async\" alt=\"$\\\\mathbf{w}(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123007-689b33cf92afa.png\">\uff1a\u6ee4\u6ce2\u5668\u6743\u503c\u5411\u91cf<\/p>\n<\/li>\n<li>\n<p><img decoding=\"async\" alt=\"$\\\\mathbf{x}(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123007-689b33cfc292f.png\">\uff1a\u8f93\u5165\u4fe1\u53f7\u5411\u91cf<\/p>\n<\/li>\n<li>\n<p><img decoding=\"async\" alt=\"$d(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123007-689b33cfefd38.png\">\uff1a\u671f\u671b\u4fe1\u53f7\uff08\u542b\u566a\u58f0\u7684\u632f\u52a8\u4fe1\u53f7\uff09<\/p>\n<\/li>\n<li>\n<p><img decoding=\"async\" alt=\"$\\\\mu$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123008-689b33d02ae29.png\">\uff1a\u6b65\u957f\u56e0\u5b50\uff08\u6536\u655b\u901f\u5ea6\u4e0e\u7a33\u5b9a\u6027\u7684\u5e73\u8861\uff09<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u540c\u9891\u5171\u632f\u6d88\u9664\u539f\u7406\uff1a<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528\u6b63\u4ea4\u53c2\u8003\u4fe1\u53f7 <img decoding=\"async\" alt=\"$\\\\sin(2\\\\pi f_0 t)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123008-689b33d063026.png\">\uff0c<img decoding=\"async\" alt=\"$\\\\cos(2\\\\pi f_0 t)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123008-689b33d09612d.png\"> \u4f5c\u4e3a\u8f93\u5165<\/p>\n<\/li>\n<li>\n<p>\u81ea\u9002\u5e94\u8c03\u6574\u6743\u503c\uff0c\u4f7f\u8f93\u51fa<img decoding=\"async\" alt=\"$y(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123008-689b33d0d85f5.png\">\u903c\u8fd1\u540c\u9891\u5e72\u6270\u5206\u91cf<\/p>\n<\/li>\n<li>\n<p>\u8bef\u5dee\u4fe1\u53f7<img decoding=\"async\" alt=\"$e(n)$\" class=\"mathcode\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812123009-689b33d129e67.png\"> \u5373\u4e3a\u6ee4\u9664\u540c\u9891\u5e72\u6270\u540e\u7684\u632f\u52a8\u4fe1\u53f7<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<h5>\u4e8c\u3001MATLAB\u4eff\u771f\u9a8c\u8bc1<\/h5>\n<p>% LMS\u7b97\u6cd5\u6d88\u9664\u8f6c\u5b50\u540c\u9891\u5171\u632f &#8211; MATLAB\u4eff\u771f<br \/>\nclear; clc; close all;<\/p>\n<p>% \u53c2\u6570\u8bbe\u7f6e<br \/>\nfs = 1000;              % \u91c7\u6837\u9891\u7387 (Hz)<br \/>\nf0 = 50;                % \u8f6c\u5b50\u65cb\u8f6c\u9891\u7387 (Hz)<br \/>\nT = 1;                  % \u4fe1\u53f7\u65f6\u957f (s)<br \/>\nt = 0:1\/fs:T-1\/fs;      % \u65f6\u95f4\u5411\u91cf<br \/>\nN = length(t);          % \u6837\u672c\u6570<\/p>\n<p>% \u751f\u6210\u8f6c\u5b50\u632f\u52a8\u4fe1\u53f7 (\u542b\u540c\u9891\u5171\u632f\u548c\u566a\u58f0)<br \/>\nresonance = 1.2*sin(2*pi*f0*t + pi\/4) + 0.8*cos(2*pi*f0*t); % \u540c\u9891\u5171\u632f<br \/>\nnoise = 0.5*randn(1,N); % \u9ad8\u65af\u767d\u566a\u58f0<br \/>\nd = resonance + noise;   % \u89c2\u6d4b\u4fe1\u53f7<\/p>\n<p>% \u751f\u6210\u53c2\u8003\u4fe1\u53f7 (\u6b63\u4ea4\u57fa)<br \/>\nx_sin = sin(2*pi*f0*t);<br \/>\nx_cos = cos(2*pi*f0*t);<\/p>\n<p>% LMS\u53c2\u6570\u521d\u59cb\u5316<br \/>\nmu = 0.02;              % \u6b65\u957f\u56e0\u5b50<br \/>\nw_sin = 0;              % \u6b63\u5f26\u5206\u91cf\u6743\u503c<br \/>\nw_cos = 0;        <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb100\u6b21\uff0c\u70b9\u8d5e3\u6b21\uff0c\u6536\u85cf3\u6b21\u3002LMS\u7b97\u6cd5\u901a\u8fc7\u81ea\u9002\u5e94\u8c03\u6574\u6ee4\u6ce2\u5668\u6743\u503c\u6709\u6548\u6d88\u9664\u8f6c\u5b50\u7cfb\u7edf\u4e2d\u7684\u540c\u9891\u5171\u632f\u3002\u7b97\u6cd5\u5229\u7528\u6b63\u4ea4\u53c2\u8003\u4fe1\u53f7\u4f30\u8ba1\u540c\u9891\u5e72\u6270\u5206\u91cf\uff0c\u8bef\u5dee\u4fe1\u53f7\u5373\u4e3a\u6d88\u9664\u5171\u632f\u540e\u7684\u632f\u52a8\u4fe1\u53f7\u3002MATLAB\u4eff\u771f\u663e\u793a\u8be5\u7b97\u6cd5\u80fd\u57280.2\u79d2\u5185\u7a33\u5b9a\u6536\u655b\uff0c50Hz\u5171\u632f\u5206\u91cf\u8870\u51cf\u8d8530dB\u3002C\u8bed\u8a00\u5b9e\u73b0\u91c7\u7528\u5b9a\u70b9\u8fd0\u7b97\u548c\u67e5\u8868\u6cd5\u4f18\u5316\uff0c\u5904\u7406\u5ef6\u8fdf\u5c0f\u4e8e50\u03bcs\uff0c\u5df2\u5728\u5de5\u7a0b\u5b9e\u8df5\u4e2d\u9a8c\u8bc1\u53ef\u6d88\u966485%\u4ee5\u4e0a\u540c\u9891\u632f\u52a8\u3002\u7cfb\u7edf\u9700\u6ce8\u610f\u91c7\u6837\u7387\u5339\u914d\u548c\u7a33\u5b9a\u6027\u63aa\u65bd\uff0c\u9002\u7528\u4e8e\u5d4c\u5165\u5f0f\u5b9e\u65f6\u63a7\u5236\u573a\u666f\u3002<\/p>\n","protected":false},"author":2,"featured_media":53966,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[5497,5496,5494,427,5495,5498],"topic":[],"class_list":["post-53977","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-lms","tag-5496","tag-5494","tag-427","tag-5495","tag-5498"],"yoast_head":"<!-- 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content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb100\u6b21\uff0c\u70b9\u8d5e3\u6b21\uff0c\u6536\u85cf3\u6b21\u3002LMS\u7b97\u6cd5\u901a\u8fc7\u81ea\u9002\u5e94\u8c03\u6574\u6ee4\u6ce2\u5668\u6743\u503c\u6709\u6548\u6d88\u9664\u8f6c\u5b50\u7cfb\u7edf\u4e2d\u7684\u540c\u9891\u5171\u632f\u3002\u7b97\u6cd5\u5229\u7528\u6b63\u4ea4\u53c2\u8003\u4fe1\u53f7\u4f30\u8ba1\u540c\u9891\u5e72\u6270\u5206\u91cf\uff0c\u8bef\u5dee\u4fe1\u53f7\u5373\u4e3a\u6d88\u9664\u5171\u632f\u540e\u7684\u632f\u52a8\u4fe1\u53f7\u3002MATLAB\u4eff\u771f\u663e\u793a\u8be5\u7b97\u6cd5\u80fd\u57280.2\u79d2\u5185\u7a33\u5b9a\u6536\u655b\uff0c50Hz\u5171\u632f\u5206\u91cf\u8870\u51cf\u8d8530dB\u3002C\u8bed\u8a00\u5b9e\u73b0\u91c7\u7528\u5b9a\u70b9\u8fd0\u7b97\u548c\u67e5\u8868\u6cd5\u4f18\u5316\uff0c\u5904\u7406\u5ef6\u8fdf\u5c0f\u4e8e50\u03bcs\uff0c\u5df2\u5728\u5de5\u7a0b\u5b9e\u8df5\u4e2d\u9a8c\u8bc1\u53ef\u6d88\u966485%\u4ee5\u4e0a\u540c\u9891\u632f\u52a8\u3002\u7cfb\u7edf\u9700\u6ce8\u610f\u91c7\u6837\u7387\u5339\u914d\u548c\u7a33\u5b9a\u6027\u63aa\u65bd\uff0c\u9002\u7528\u4e8e\u5d4c\u5165\u5f0f\u5b9e\u65f6\u63a7\u5236\u573a\u666f\u3002\" 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