{"id":91101,"date":"2024-04-11T16:30:57","date_gmt":"2024-04-11T08:30:57","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=91101"},"modified":"2024-04-11T16:31:01","modified_gmt":"2024-04-11T08:31:01","slug":"flbqdjbyl","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/91101.html","title":{"rendered":"FIR\u6ee4\u6ce2\u5668\u7684\u57fa\u672c\u539f\u7406"},"content":{"rendered":"\n<p>\u3000\u3000<strong>FIR\u6ee4\u6ce2\u5668(Finite Impulse Response Filter)\u7684\u57fa\u672c\u539f\u7406<\/strong>\u662f\u901a\u8fc7\u7b97\u6cd5\u4f7f\u67d0\u65f6\u523b\u7684\u503c\u5904\u4e8e\u4e00\u4e2a\u66f4\u4e3a\u51c6\u786e\u7684\u72b6\u6001\u3002\u8fd9\u79cd\u6ee4\u6ce2\u5668\u6ca1\u6709\u53cd\u9988\u56de\u8def\uff0c\u56e0\u6b64\u7a33\u5b9a\u6027\u5f3a\uff0c\u4e14\u7b97\u6cd5\u8ba1\u7b97\u5b8c\u6210\u540e\u4e0e\u539f\u5148\u6570\u636e\u6709\u7ebf\u6027\u7684\u76f8\u4f4d\u5dee\uff0c\u66f4\u5bb9\u6613\u5c06\u8ba1\u7b97\u540e\u7684\u4fe1\u53f7\u76f8\u4f4d\u8fd8\u539f\u6210\u539f\u76f8\u4f4d\u3002FIR\u6ee4\u6ce2\u5668\u7684\u5de5\u4f5c\u539f\u7406\u53ef\u4ee5\u901a\u8fc7\u5377\u79ef\u5b9e\u73b0\uff0c\u6838\u5fc3\u662f\u5982\u4f55\u6839\u636e\u5e94\u7528\u9700\u6c42\u6784\u9020\u5408\u9002\u7684\u5377\u79ef\u6838(Filter kernel)\u3002\u5bf9\u4e8e\u65f6\u57df\u6ee4\u6ce2\uff0c\u77e9\u5f62\u8109\u51b2\u5377\u79ef\u6838(\u5373\u6ed1\u52a8\u5e73\u5747)\u53ef\u4ee5\u6709\u6548\u6062\u590d\u65f6\u57df\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>\u3000\u3000FIR\u6ee4\u6ce2\u5668\u7684\u4e00\u4e2a\u91cd\u8981\u7279\u6027\u662f\u5b83\u5177\u6709\u4e25\u683c\u7684\u7ebf\u6027\u76f8\u9891\u7279\u6027\uff0c\u5728\u6709\u6548\u9891\u7387\u8303\u56f4\u5185\u6240\u6709\u4fe1\u53f7\u76f8\u4f4d\u4e0a\u4e0d\u5931\u771f\uff0c\u8fd9\u4f7f\u5f97FIR\u6ee4\u6ce2\u5668\u5728\u901a\u4fe1\u3001\u56fe\u50cf\u5904\u7406\u3001\u6a21\u5f0f\u8bc6\u522b\u7b49\u9886\u57df\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u6b64\u5916\uff0cFIR\u6ee4\u6ce2\u5668\u7684\u8bbe\u8ba1\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u8fdb\u884c\uff0c\u5982\u7a97\u51fd\u6570\u6cd5\u3001\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\u3001\u6700\u5c0f\u5747\u65b9\u5dee\u7b49\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u4ece\u6570\u5b66\u7406\u8bba\u4e0a\u7ed9\u51fa\u4e86\u8bbe\u8ba1\u539f\u7406\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>FIR\u6ee4\u6ce2\u5668\u7684\u57fa\u672c\u539f\u7406\u662f\u901a\u8fc7\u5bf9\u8f93\u5165\u4fe1\u53f7\u8fdb\u884c\u52a0\u6743\u5904\u7406\u6765\u6539\u53d8\u5176\u9891\u7387\u7279\u6027\uff0c\u4ee5\u8fbe\u5230\u9884\u671f\u7684\u6ee4\u6ce2\u6548\u679c\u3002\u5176\u7279\u70b9\u662f\u7a33\u5b9a\u6027\u5f3a\u3001\u7ebf\u6027\u76f8\u4f4d\u7279\u6027\u597d\uff0c\u9002\u7528\u4e8e\u591a\u79cd\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u573a\u666f\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 FIR\u6ee4\u6ce2\u5668\u7684\u5377\u79ef\u5b9e\u73b0\u539f\u7406\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n<p>\u3000\u3000FIR\u6ee4\u6ce2\u5668\u7684\u5377\u79ef\u5b9e\u73b0\u539f\u7406\u4e3b\u8981\u662f\u901a\u8fc7\u5728\u65f6\u57df\u4e2d\u5c06\u8f93\u5165\u4fe1\u53f7\u4e0e\u4e00\u7ec4\u9884\u8bbe\u7684\u6570\u5b57\u7cfb\u6570\u8fdb\u884c\u5377\u79ef\u8fd0\u7b97\u6765\u5b9e\u73b0\u5bf9\u4fe1\u53f7\u7684\u6ee4\u6ce2\u5904\u7406\u3002\u8fd9\u7ec4\u6570\u5b57\u7cfb\u6570\u88ab\u79f0\u4e3a\u6ee4\u6ce2\u5668\u7684\u62bd\u5934\u7cfb\u6570\u3002\u5177\u4f53\u6765\u8bf4\uff0cFIR\u6ee4\u6ce2\u5668\u662f\u6709\u9650\u8109\u51b2\u54cd\u5e94\u6ee4\u6ce2\u5668\uff0c\u5176\u5355\u4f4d\u8109\u51b2\u54cd\u5e94h(n)\u7684\u957f\u5ea6\u662f\u6709\u9650\u7684\uff0c\u8fd9\u610f\u5473\u7740\u7cfb\u7edf\u7684\u8f93\u51fay(n)\u662f\u901a\u8fc7\u8f93\u5165\u4fe1\u53f7x(n)\u4e0e\u5355\u4f4d\u53d6\u6837\u8109\u51b2\u54cd\u5e94h(n)\u7684\u5377\u79ef\u5f97\u5230\u7684\uff0c\u5bf9\u5e94\u7684\u5728\u9891\u57df\u8868\u793a\u4e3ay=x*h\u3002\u6b64\u5916\uff0cFIR\u6ee4\u6ce2\u5668\u5177\u6709\u4e25\u683c\u7684\u7ebf\u6027\u76f8\u9891\u7279\u6027\uff0c\u5176\u5355\u4f4d\u54cd\u5e94\u662f\u6709\u9650\u957f\u7684\uff0c\u56e0\u6b64\u662f\u4e00\u4e2a\u7a33\u5b9a\u7684\u7cfb\u7edf\u3002\u5728\u8bbe\u8ba1FIR\u6ee4\u6ce2\u5668\u65f6\uff0c\u53ef\u4ee5\u91c7\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\uff0c\u5982\u7a97\u51fd\u6570\u6cd5\u3001\u7b49\u6ce2\u7eb9\u6700\u4f73\u903c\u8fd1\u6cd5\u7b49\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7FFT(\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362)\u6280\u672f\u6765\u63d0\u9ad8\u5377\u79ef\u8ba1\u7b97\u7684\u6548\u7387\u3002\u603b\u7684\u6765\u8bf4\uff0cFIR\u6ee4\u6ce2\u5668\u7684\u5377\u79ef\u5b9e\u73b0\u539f\u7406\u662f\u901a\u8fc7\u65f6\u57df\u4e2d\u7684\u5377\u79ef\u8fd0\u7b97\uff0c\u7ed3\u5408\u9884\u8bbe\u7684\u6570\u5b57\u7cfb\u6570(\u62bd\u5934\u7cfb\u6570)\uff0c\u4ee5\u53ca\u53ef\u80fd\u7684\u4f18\u5316\u6280\u672f(\u5982FFT)\uff0c\u6765\u8fbe\u5230\u6ee4\u6ce2\u7684\u76ee\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 \u5982\u4f55\u6839\u636e\u5e94\u7528\u9700\u6c42\u6784\u9020\u5408\u9002\u7684FIR\u6ee4\u6ce2\u5668\u5377\u79ef\u6838?<\/h2>\n\n\n\n<p>\u3000\u3000\u6839\u636e\u5e94\u7528\u9700\u6c42\u6784\u9020\u5408\u9002\u7684FIR\u6ee4\u6ce2\u5668\u5377\u79ef\u6838\uff0c\u9996\u5148\u9700\u8981\u660e\u786e\u6ee4\u6ce2\u5668\u7684\u8bbe\u8ba1\u76ee\u6807\u548c\u6027\u80fd\u6307\u6807\u3002\u8bbe\u8ba1FIR\u6ee4\u6ce2\u5668\u65f6\uff0c\u4e3b\u8981\u8003\u8651\u7684\u56e0\u7d20\u5305\u62ec\u901a\u5e26\u3001\u963b\u5e26\u3001\u8fc7\u6e21\u5e26\u7684\u7279\u6027\u4ee5\u53ca\u6ee4\u6ce2\u5668\u7684\u9636\u6570\u7b49\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000\u786e\u5b9a\u8bbe\u8ba1\u76ee\u6807\u548c\u6027\u80fd\u6307\u6807\uff1a\u6839\u636e\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\uff0c\u660e\u786e\u6ee4\u6ce2\u5668\u9700\u8981\u8fbe\u5230\u7684\u76ee\u6807\uff0c\u5982\u662f\u5426\u9700\u8981\u4f4e\u901a\u6ee4\u6ce2\u3001\u9ad8\u901a\u6ee4\u6ce2\u3001\u5e26\u901a\u6ee4\u6ce2\u6216\u5e26\u963b\u6ee4\u6ce2\uff0c\u4ee5\u53ca\u5177\u4f53\u7684\u9891\u7387\u54cd\u5e94\u8981\u6c42(\u5982\u901a\u5e26\u5185\u7684\u5e73\u5766\u5ea6\u3001\u963b\u5e26\u5185\u7684\u6291\u5236\u80fd\u529b\u7b49)\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u786e\u5b9a\u6ee4\u6ce2\u5668\u53c2\u6570\uff1a\u6839\u636e\u9009\u5b9a\u7684\u8bbe\u8ba1\u65b9\u6cd5\uff0c\u786e\u5b9a\u6ee4\u6ce2\u5668\u7684\u5173\u952e\u53c2\u6570\uff0c\u5982\u901a\u5e26\u9891\u7387\u3001\u963b\u5e26\u9891\u7387\u3001\u8fc7\u6e21\u5e26\u5bbd\u5ea6\u3001\u6ee4\u6ce2\u5668\u7684\u9636\u6570\u7b49\u3002\u8fd9\u4e9b\u53c2\u6570\u76f4\u63a5\u5f71\u54cd\u5230\u6ee4\u6ce2\u5668\u7684\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u4ed4\u7ec6\u9009\u62e9\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u4f7f\u7528\u5de5\u5177\u8fdb\u884c\u8bbe\u8ba1\uff1a\u53ef\u4ee5\u5229\u7528\u4e13\u4e1a\u8f6f\u4ef6(\u5982Matlab)\u8fdb\u884cFIR\u6ee4\u6ce2\u5668\u7684\u8bbe\u8ba1\u3002\u901a\u8fc7\u8f6f\u4ef6\u63d0\u4f9b\u7684\u8bbe\u8ba1\u5de5\u5177\uff0c\u5982filterDesigner\uff0c\u8f93\u5165\u4e0a\u8ff0\u786e\u5b9a\u7684\u53c2\u6570\uff0c\u5373\u53ef\u5f97\u5230\u6ee1\u8db3\u8981\u6c42\u7684FIR\u6ee4\u6ce2\u5668\u8bbe\u8ba1\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u8bc4\u4f30\u548c\u8c03\u6574\uff1a\u8bbe\u8ba1\u5b8c\u6210\u540e\uff0c\u9700\u8981\u5bf9\u6ee4\u6ce2\u5668\u7684\u6027\u80fd\u8fdb\u884c\u8bc4\u4f30\uff0c\u786e\u4fdd\u5176\u6ee1\u8db3\u6240\u6709\u9884\u5b9a\u7684\u8981\u6c42\u3002\u5fc5\u8981\u65f6\uff0c\u6839\u636e\u8bc4\u4f30\u7ed3\u679c\u5bf9\u6ee4\u6ce2\u5668\u53c2\u6570\u8fdb\u884c\u8c03\u6574\uff0c\u4ee5\u8fbe\u5230\u6700\u4f73\u7684\u8bbe\u8ba1\u6548\u679c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u6784\u9020\u5408\u9002\u7684FIR\u6ee4\u6ce2\u5668\u5377\u79ef\u6838\u9700\u8981\u7efc\u5408\u8003\u8651\u8bbe\u8ba1\u76ee\u6807\u3001\u6027\u80fd\u6307\u6807\u3001\u8bbe\u8ba1\u65b9\u6cd5\u3001\u5173\u952e\u53c2\u6570\u4ee5\u53ca\u5b9e\u9645\u5e94\u7528\u9700\u6c42\u7b49\u591a\u4e2a\u65b9\u9762\u3002\u901a\u8fc7\u7cbe\u786e\u7684\u9700\u6c42\u5206\u6790\u548c\u5408\u7406\u7684\u8bbe\u8ba1\u65b9\u6cd5\u9009\u62e9\uff0c\u53ef\u4ee5\u8bbe\u8ba1\u51fa\u6ee1\u8db3\u7279\u5b9a\u5e94\u7528\u9700\u6c42\u7684FIR\u6ee4\u6ce2\u5668\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 FIR\u6ee4\u6ce2\u5668\u5728\u901a\u4fe1\u548c\u56fe\u50cf\u5904\u7406\u4e2d\u7684\u5177\u4f53\u5e94\u7528\u6848\u4f8b\u6709\u54ea\u4e9b?<\/h2>\n\n\n\n<p>\u3000\u3000FIR\u6ee4\u6ce2\u5668\u5728\u901a\u4fe1\u548c\u56fe\u50cf\u5904\u7406\u4e2d\u7684\u5177\u4f53\u5e94\u7528\u6848\u4f8b\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000\u901a\u4fe1\u8c03\u5236\u4e0e\u89e3\u8c03\uff1aFIR\u6ee4\u6ce2\u5668\u5728\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7528\u4e8e\u4fe1\u53f7\u7684\u8c03\u5236\u4e0e\u89e3\u8c03\uff0c\u4ee5\u53ca\u566a\u58f0\u7684\u6291\u5236\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8bbe\u8ba1\u7279\u5b9a\u7684FIR\u6ee4\u6ce2\u5668\u6765\u5b9e\u73b0\u9ad8\u6548\u7387\u7684\u6570\u636e\u4f20\u8f93\uff0c\u901a\u8fc7\u8c03\u6574\u6ee4\u6ce2\u5668\u7684\u53c2\u6570\u6765\u4f18\u5316\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\uff0c\u51cf\u5c11\u4fe1\u53f7\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u635f\u5931\u6216\u5e72\u6270\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u56fe\u50cf\u53bb\u566a\uff1a\u5728\u56fe\u50cf\u5904\u7406\u4e2d\uff0cFIR\u6ee4\u6ce2\u5668\u5e38\u88ab\u7528\u4e8e\u53bb\u9664\u56fe\u50cf\u566a\u58f0\uff0c\u63d0\u9ad8\u56fe\u50cf\u8d28\u91cf\u3002\u901a\u8fc7\u8bbe\u8ba1\u5408\u9002\u7684FIR\u6ee4\u6ce2\u5668\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5bf9\u56fe\u50cf\u8fdb\u884c\u6ee4\u6ce2\u53bb\u566a\uff0c\u53bb\u9664\u4e0d\u9700\u8981\u7684\u7ec6\u8282\u4fe1\u606f\uff0c\u540c\u65f6\u4fdd\u7559\u91cd\u8981\u7684\u56fe\u50cf\u7279\u5f81\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u5e03\u83b1\u514b\u66fc\u7a97\u51fd\u6570\u6cd5\u548c\u7b49\u6ce2\u7eb9\u6700\u4f73\u903c\u8fd1\u6cd5\u8bbe\u8ba1\u7684FIR\u6ee4\u6ce2\u5668\u80fd\u591f\u6709\u6548\u5730\u5bf9\u56fe\u50cf\u8fdb\u884c\u53bb\u566a\u5904\u7406\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u56fe\u50cf\u589e\u5f3a\uff1aFIR\u6ee4\u6ce2\u5668\u8fd8\u53ef\u4ee5\u5e94\u7528\u4e8e\u56fe\u50cf\u589e\u5f3a\u5904\u7406\uff0c\u5982\u5bf9\u6bd4\u5ea6\u589e\u5f3a\u3001\u8fb9\u7f18\u68c0\u6d4b\u7b49\u3002\u901a\u8fc7\u5bf9FIR\u6ee4\u6ce2\u5668\u7684\u8bbe\u8ba1\u548c\u8c03\u6574\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u56fe\u50cf\u7279\u5b9a\u533a\u57df\u7684\u589e\u5f3a\uff0c\u4f7f\u5f97\u56fe\u50cf\u66f4\u52a0\u6e05\u6670\uff0c\u7ec6\u8282\u66f4\u52a0\u7a81\u51fa\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000FIR\u6ee4\u6ce2\u5668\u5728\u901a\u4fe1\u548c\u56fe\u50cf\u5904\u7406\u9886\u57df\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u4e0d\u4ec5\u5305\u62ec\u57fa\u672c\u7684\u4fe1\u53f7\u5904\u7406\u529f\u80fd\uff0c\u8fd8\u6d89\u53ca\u5230\u590d\u6742\u7684\u56fe\u50cf\u5904\u7406\u4efb\u52a1\uff0c\u5982\u53bb\u566a\u3001\u56fe\u50cf\u589e\u5f3a\u7b49\u3002\u901a\u8fc7\u5408\u7406\u8bbe\u8ba1FIR\u6ee4\u6ce2\u5668\u7684\u53c2\u6570\u548c\u7ed3\u6784\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u5347\u901a\u4fe1\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u56fe\u50cf\u5904\u7406\u7684\u6548\u679c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 \u7a97\u51fd\u6570\u6cd5\u3001\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\u548c\u6700\u5c0f\u5747\u65b9\u5dee\u8bbe\u8ba1FIR\u6ee4\u6ce2\u5668\u7684\u65b9\u6cd5\u6709\u4f55\u533a\u522b\u548c\u4f18\u52a3?<\/h2>\n\n\n\n<p>\u3000\u3000\u7a97\u51fd\u6570\u6cd5\u3001\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\u548c\u6700\u5c0f\u5747\u65b9\u5dee\u8bbe\u8ba1FIR\u6ee4\u6ce2\u5668\u7684\u65b9\u6cd5\u5404\u6709\u5176\u7279\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u4e0b\u9762\u5c06\u57fa\u4e8e\u6211\u641c\u7d22\u5230\u7684\u8d44\u6599\u8fdb\u884c\u8be6\u7ec6\u6bd4\u8f83\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000\u7a97\u51fd\u6570\u6cd5\uff1a\u7a97\u51fd\u6570\u6cd5\u7684\u57fa\u672c\u601d\u60f3\u662f\u901a\u8fc7\u8bbe\u8ba1\u4e00\u4e2a\u7406\u60f3\u7ebf\u6027\u76f8\u4f4d\u6ee4\u6ce2\u5668\uff0c\u5e76\u7528\u6709\u9650\u957f\u7684\u5355\u4f4d\u8109\u51b2\u5e8f\u5217\u6765\u903c\u8fd1\u8fd9\u4e2a\u7406\u60f3\u6ee4\u6ce2\u5668\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u5728\u4e8e\u7b80\u5355\u6613\u884c\uff0c\u9002\u7528\u4e8e\u5feb\u901f\u5b9e\u73b0\u5177\u6709\u7279\u5b9a\u9891\u7387\u54cd\u5e94\u7684FIR\u6ee4\u6ce2\u5668\u3002\u7136\u800c\uff0c\u7a97\u51fd\u6570\u6cd5\u5728\u8bbe\u8ba1\u65f6\u9700\u8981\u8003\u8651\u65c1\u74e3\u79ef\u5206\u548c\u4e3b\u74e3\u79ef\u5206\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u6ee4\u6ce2\u5668\u7684\u6027\u80fd\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\uff1a\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u5bf9H\u4f5c\u6700\u4f73\u903c\u8fd1\uff0c\u4ee5\u83b7\u5f97\u8f83\u597d\u7684\u901a\u5e26\u548c\u963b\u5e26\u6027\u80fd\uff0c\u5e76\u80fd\u51c6\u786e\u5730\u5236\u5b9a\u901a\u5e26\u548c\u963b\u5e26\u7684\u8fb9\u7f18\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u52bf\u5728\u4e8e\u80fd\u591f\u63d0\u4f9b\u8f83\u597d\u7684\u901a\u5e26\u548c\u963b\u5e26\u7279\u6027\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u7cbe\u786e\u63a7\u5236\u901a\u5e26\u548c\u963b\u5e26\u8fb9\u7f18\u7684\u60c5\u51b5\u4e0b\u3002\u4e0d\u8fc7\uff0c\u4e0e\u7a97\u51fd\u6570\u6cd5\u76f8\u6bd4\uff0c\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6ee4\u6ce2\u5668\u7684\u9636\u6570\u8f83\u9ad8\u3002<\/li>\n\n\n\n<li>\u3000\u3000\u6700\u5c0f\u5747\u65b9\u5dee\u8bbe\u8ba1\u65b9\u6cd5\uff1a\u6839\u636e\u5e38\u89c1\u7684\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u77e5\u8bc6\uff0c\u6700\u5c0f\u5747\u65b9\u5dee\u8bbe\u8ba1\u662f\u4e00\u79cd\u4f18\u5316\u8bbe\u8ba1\u65b9\u6cd5\uff0c\u65e8\u5728\u6700\u5c0f\u5316\u5b9e\u9645\u6ee4\u6ce2\u5668\u8f93\u51fa\u4e0e\u7406\u60f3\u6ee4\u6ce2\u5668\u8f93\u51fa\u4e4b\u95f4\u7684\u5747\u65b9\u8bef\u5dee\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u5e38\u6d89\u53ca\u5230\u590d\u6742\u7684\u6570\u5b66\u8fd0\u7b97\u548c\u4f18\u5316\u7b97\u6cd5\uff0c\u53ef\u4ee5\u63d0\u4f9b\u975e\u5e38\u63a5\u8fd1\u7406\u60f3\u6ee4\u6ce2\u5668\u7279\u6027\u7684\u6ee4\u6ce2\u5668\u8bbe\u8ba1\u3002\u7136\u800c\uff0c\u8fd9\u4e5f\u610f\u5473\u7740\u8bbe\u8ba1\u8fc7\u7a0b\u53ef\u80fd\u66f4\u4e3a\u590d\u6742\u548c\u8ba1\u7b97\u5bc6\u96c6\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u7a97\u51fd\u6570\u6cd5\u56e0\u5176\u7b80\u5355\u6027\u548c\u6613\u7528\u6027\u800c\u53d7\u5230\u9752\u7750\uff0c\u9002\u5408\u5feb\u901f\u539f\u578b\u8bbe\u8ba1;\u5207\u6bd4\u96ea\u592b\u903c\u8fd1\u6cd5\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u901a\u5e26\u548c\u963b\u5e26\u7279\u6027\uff0c\u9002\u5408\u5bf9\u6ee4\u6ce2\u5668\u6027\u80fd\u6709\u8f83\u9ad8\u8981\u6c42\u7684\u5e94\u7528;\u800c\u6700\u5c0f\u5747\u65b9\u5dee\u8bbe\u8ba1\u65b9\u6cd5\u867d\u7136\u5728\u7406\u8bba\u4e0a\u80fd\u63d0\u4f9b\u6700\u63a5\u8fd1\u7406\u60f3\u7684\u6ee4\u6ce2\u5668\u8bbe\u8ba1\uff0c\u4f46\u5176\u8bbe\u8ba1\u8fc7\u7a0b\u8f83\u4e3a\u590d\u6742\uff0c\u8ba1\u7b97\u6210\u672c\u8f83\u9ad8\u3002\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u8bbe\u8ba1\u9700\u6c42\u3001\u65f6\u95f4\u9650\u5236\u4ee5\u53ca\u53ef\u7528\u8d44\u6e90\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e94\u3001 FIR\u6ee4\u6ce2\u5668\u7684\u7ebf\u6027\u76f8\u9891\u7279\u6027\u662f\u5982\u4f55\u4fdd\u8bc1\u7684?<\/h2>\n\n\n\n<p>\u3000\u3000FIR\u6ee4\u6ce2\u5668\u7684\u7ebf\u6027\u76f8\u9891\u7279\u6027\u662f\u901a\u8fc7\u8bbe\u8ba1\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u5355\u4f4d\u8109\u51b2\u54cd\u5e94( impulse response)\u6765\u4fdd\u8bc1\u7684\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u5982\u679cFIR\u6ee4\u6ce2\u5668\u7684\u5355\u4f4d\u8109\u51b2\u54cd\u5e94\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\uff1a(h(n) = \\pm h(N-1-n))\uff0c\u5176\u4e2d(N)\u4e3a(h(n))\u7684\u957f\u5ea6\uff0c\u5219\u8be5FIR\u6ee4\u6ce2\u5668\u5177\u6709\u4e25\u683c\u7684\u7ebf\u6027\u76f8\u4f4d\u7279\u6027\u3002\u8fd9\u79cd\u8bbe\u8ba1\u65b9\u6cd5\u5229\u7528\u4e86\u5b9e\u5076\u5bf9\u79f0\u5e8f\u5217\u548c\u5b9e\u5947\u5bf9\u79f0\u5e8f\u5217\u7684\u76f8\u9891\u7279\u6027\uff0c\u5373\u5b9e\u5076\u5bf9\u79f0\u5e8f\u5217\u7684\u76f8\u9891\u7279\u6027\u4e3a\u5e38\u65700.\u800c\u5b9e\u5947\u5bf9\u79f0\u5e8f\u5217\u7684\u76f8\u9891\u7279\u6027\u4e3a\u5e38\u657090\u5ea6\u3002\u8fd9\u6837\u7684\u8bbe\u8ba1\u4f7f\u5f97FIR\u6ee4\u6ce2\u5668\u5728\u5904\u7406\u4fe1\u53f7\u65f6\uff0c\u80fd\u591f\u5b9e\u73b0\u6700\u5c0f\u7a0b\u5ea6\u7684\u5931\u771f\uff0c\u8f93\u51fa\u662f\u8f93\u5165\u5355\u7eaf\u7684\u76f8\u4f4d\u5ef6\u8fdf\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u6b64\u5916\uff0cFIR\u6ee4\u6ce2\u5668\u7684\u8bbe\u8ba1\u8fd8\u8003\u8651\u5230\u4e86\u7a33\u5b9a\u6027\u548c\u5e73\u6ed1\u6027\uff0c\u901a\u8fc7\u6709\u9650\u957f\u7684\u5355\u4f4d\u62bd\u6837\u54cd\u5e94\u5b9e\u73b0\u7a33\u5b9a\u6027\u548c\u5bb9\u6613\u5b9e\u73b0\u7ebf\u6027\u76f8\u4f4d\u7684\u7279\u70b9\u3002\u8fd9\u79cd\u8bbe\u8ba1\u4e0d\u4ec5\u4fdd\u8bc1\u4e86\u5e45\u5ea6\u7279\u6027\u6ee1\u8db3\u6280\u672f\u8981\u6c42\uff0c\u800c\u4e14\u901a\u8fc7\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362\u7b97\u6cd5\u5b9e\u73b0\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u8fd0\u7b97\u6548\u7387\u3002<\/p>\n\n\n\n<p>\u3000\u3000FIR\u6ee4\u6ce2\u5668\u7684\u7ebf\u6027\u76f8\u9891\u7279\u6027\u662f\u901a\u8fc7\u7cbe\u5fc3\u8bbe\u8ba1\u5176\u5355\u4f4d\u8109\u51b2\u54cd\u5e94\u6765\u5b9e\u73b0\u7684\uff0c\u786e\u4fdd\u4e86\u6ee4\u6ce2\u5668\u5728\u5904\u7406\u4fe1\u53f7\u65f6\u5177\u6709\u6700\u5c0f\u7684\u5931\u771f\uff0c\u5e76\u4e14\u4fdd\u6301\u4e86\u826f\u597d\u7684\u7a33\u5b9a\u6027\u548c\u8fd0\u7b97\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>FIR\u6ee4\u6ce2\u5668\u7684\u57fa\u672c\u539f\u7406\u662f\u901a\u8fc7\u5bf9\u8f93\u5165\u4fe1\u53f7\u8fdb\u884c\u52a0\u6743\u5904\u7406\u6765\u6539\u53d8\u5176\u9891\u7387\u7279\u6027\uff0c\u4ee5\u8fbe\u5230\u9884\u671f\u7684\u6ee4\u6ce2\u6548\u679c\u3002\u5176\u7279\u70b9\u662f\u7a33\u5b9a\u6027\u5f3a\u3001\u7ebf\u6027\u76f8\u4f4d\u7279\u6027\u597d\uff0c\u9002\u7528\u4e8e\u591a\u79cd\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u573a\u666f\u3002<\/p>\n","protected":false},"author":1,"featured_media":90603,"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":[285],"class_list":["post-91101","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-lbq"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/91101"}],"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=91101"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/91101\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/90603"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=91101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=91101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=91101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}