{"id":98072,"date":"2024-09-26T15:32:02","date_gmt":"2024-09-26T07:32:02","guid":{"rendered":"\/\/www.viralrail.com\/?p=98072"},"modified":"2024-09-26T15:32:07","modified_gmt":"2024-09-26T07:32:07","slug":"lmkgzyl","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/98072.html","title":{"rendered":"LoRa\u6a21\u5757\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"\n<p>\u3000\u3000<strong>LoRa\u6a21\u5757<\/strong>\u7684\u5de5\u4f5c\u539f\u7406\u4e3b\u8981\u57fa\u4e8e\u6269\u9891\u8c03\u5236\u6280\u672f\uff0c\u7279\u522b\u662f\u91c7\u7528<strong>Chirp Spread Spectrum (CSS) \u8c03\u5236<\/strong>\u65b9\u5f0f\u3002\u8fd9\u79cd\u6280\u672f\u901a\u8fc7<strong>\u7ebf\u6027\u9891\u7387\u8c03\u5236(LFM)<\/strong>\u4ea7\u751f\u201c\u5541\u557e\u201d\u4fe1\u53f7\uff0c\u6bcf\u4e2a\u6570\u636e\u5305\u7684\u8f7d\u6ce2\u9891\u7387\u968f\u7740\u65f6\u95f4\u7ebf\u6027\u53d8\u5316\uff0c\u4ece\u800c\u5b9e\u73b0\u8fdc\u8ddd\u79bb\u3001\u4f4e\u529f\u8017\u548c\u9ad8\u6297\u5e72\u6270\u6027\u7684\u901a\u4fe1\u7279\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u5177\u4f53\u64cd\u4f5c\u4e2d\uff0cLoRa\u6a21\u5757\u63a5\u6536\u5230\u8981\u53d1\u9001\u7684\u6570\u636e\u540e\uff0c\u5c06\u5176\u8f6c\u6362\u6210LoRa\u534f\u8bae\u683c\u5f0f\u7684\u6570\u636e\uff0c\u7136\u540e\u901a\u8fc7\u65e0\u7ebf\u4fe1\u9053\u5c06\u6570\u636e\u53d1\u9001\u51fa\u53bb\u3002\u63a5\u6536\u65b9\u7684LoRa\u6a21\u5757\u63a5\u6536\u5230\u6570\u636e\u540e\uff0c\u518d\u8fdb\u884c\u89e3\u8c03\u548c\u89e3\u7801\uff0c\u4ece\u800c\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u7684\u6838\u5fc3\u4f18\u52bf\u5728\u4e8e\u5176\u6269\u9891\u7279\u6027\uff0c\u901a\u8fc7\u5728\u8f83\u5bbd\u7684\u9891\u5e26\u4e0a\u53d1\u9001\u4fe1\u53f7\u6765\u62b5\u6297\u591a\u5f84\u8870\u843d\u548c\u5e72\u6270\u3002\u6b64\u5916\uff0c\u901a\u8fc7\u8c03\u6574\u5173\u952e\u53c2\u6570\u5982\u6269\u9891\u56e0\u5b50\u3001\u7f16\u7801\u7387\u548c\u5e26\u5bbd\uff0c\u4ee5\u53ca\u5229\u7528\u9ad8\u7075\u654f\u5ea6\u7279\u6027\uff0cLoRa\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u4fe1\u566a\u6bd4\u4e0b\u5b9e\u73b0\u53ef\u9760\u7684\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>LoRa\u6a21\u5757\u901a\u5e38\u5de5\u4f5c\u5728ISM\u9891\u6bb5\uff0c\u5e38\u89c1\u7684\u9891\u6bb5\u5305\u62ec433 MHz\u3001868 MHz\u548c915 MHz\uff0c\u8fd9\u4e9b\u9891\u6bb5\u88ab\u5e7f\u6cdb\u7528\u4e8e\u7269\u8054\u7f51(IoT)\u7f51\u7edc\u4e2d\u3002<\/strong>LoRa\u6280\u672f\u4e0d\u4ec5\u9002\u7528\u4e8e\u957f\u8ddd\u79bb\u901a\u4fe1\uff0c\u8fd8\u5177\u6709\u4f4e\u529f\u8017\u7684\u7279\u70b9\uff0c\u4f7f\u5176\u975e\u5e38\u9002\u5408\u4e8e\u7535\u6c60\u4f9b\u7535\u7684\u8bbe\u5907\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 LoRa\u6a21\u5757\u5728\u4e0d\u540c\u6269\u9891\u56e0\u5b50\u3001\u7f16\u7801\u7387\u548c\u5e26\u5bbd\u8bbe\u7f6e\u4e0b\u7684\u6027\u80fd\u5bf9\u6bd4<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u7684\u6027\u80fd\u5728\u4e0d\u540c\u7684\u6269\u9891\u56e0\u5b50(SF)\u3001\u7f16\u7801\u7387(CR)\u548c\u5e26\u5bbd(BW)\u8bbe\u7f6e\u4e0b\u4f1a\u6709\u6240\u53d8\u5316\u3002\u8fd9\u4e9b\u53c2\u6570\u5171\u540c\u51b3\u5b9a\u4e86LoRa\u6a21\u5757\u7684\u94fe\u8def\u9884\u7b97\u3001\u4f20\u8f93\u65f6\u95f4\u3001\u6570\u636e\u901f\u7387\u3001\u6297\u5e72\u6270\u80fd\u529b\u548c\u7535\u6c60\u5bff\u547d\u4e4b\u95f4\u7684\u6743\u8861\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001.&nbsp;<strong>\u6269\u9891\u56e0\u5b50\uff08SF\uff09<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u6269\u9891\u56e0\u5b50\u8d8a\u9ad8\uff0c\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u8d8a\u5f3a\uff0c\u4f46\u4f20\u8f93\u65f6\u95f4\u4f1a\u53d8\u957f\uff0c\u6570\u636e\u901f\u7387\u4f1a\u964d\u4f4e\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u9ad8\u6269\u9891\u56e0\u5b50\u53ef\u4ee5\u63d0\u9ad8\u4fe1\u53f7\u589e\u76ca\uff0c\u4f7f\u5f97LoRa\u6a21\u5757\u5728\u4f4e\u4fe1\u566a\u6bd4(SNR)\u6761\u4ef6\u4e0b\u4ecd\u80fd\u4fdd\u6301\u901a\u4fe1\u8d28\u91cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002.&nbsp;<strong>\u7f16\u7801\u7387\uff08CR\uff09<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u7f16\u7801\u7387\u8d8a\u9ad8\uff0c\u6570\u636e\u7684\u5197\u4f59\u5ea6\u8d8a\u5927\uff0c\u6297\u5e72\u6270\u80fd\u529b\u8d8a\u5f3a\uff0c\u4f46\u4f20\u8f93\u901f\u7387\u4f1a\u964d\u4f4e\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u901a\u8fc7\u8c03\u6574\u7f16\u7801\u7387\uff0c\u53ef\u4ee5\u5728\u6570\u636e\u901f\u7387\u548c\u94fe\u8def\u53ef\u9760\u6027\u4e4b\u95f4\u8fdb\u884c\u6743\u8861\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003.&nbsp;<strong>\u5e26\u5bbd\uff08BW\uff09<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5e26\u5bbd\u8d8a\u5bbd\uff0c\u6570\u636e\u901f\u7387\u8d8a\u9ad8\uff0c\u4f46\u8986\u76d6\u8303\u56f4\u548c\u6297\u5e72\u6270\u80fd\u529b\u4f1a\u964d\u4f4e\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u4e0d\u540c\u5e26\u5bbd\u8bbe\u7f6e\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\uff0c\u4f8b\u5982125kHz\u3001250kHz\u548c500kHz\u5e26\u5bbd\u5206\u522b\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u9700\u6c42\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5177\u4f53\u6765\u8bf4\uff0c\u6539\u53d8\u8fd9\u4e9b\u53c2\u6570\u4f1a\u5f71\u54cdLoRa\u6a21\u5757\u7684\u94fe\u8def\u9884\u7b97\u548c\u4f20\u8f93\u65f6\u95f4\u3002\u4f8b\u5982\uff0c\u5728\u4f4e\u4e8e62.5kHz\u7684\u5e26\u5bbd\u5e94\u7528\u4e2d\uff0c\u5efa\u8bae\u4f7f\u7528TCXO\u4f5c\u4e3a\u53c2\u8003\u9891\u7387\u4ee5\u6ee1\u8db3\u9891\u7387\u8bef\u5dee\u5bb9\u9650\u89c4\u683c\u3002\u6b64\u5916\uff0c\u66f4\u9ad8\u7684\u6269\u9891\u56e0\u5b50\u548c\u66f4\u957f\u7684\u4f20\u8f93\u65f6\u95f4\u5bf9\u77ed\u671f\u9891\u7387\u7a33\u5b9a\u6027\u63d0\u51fa\u4e86\u66f4\u9ad8\u7684\u8981\u6c42\u3002<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u7684\u6027\u80fd\u5728\u4e0d\u540c\u7684\u6269\u9891\u56e0\u5b50\u3001\u7f16\u7801\u7387\u548c\u5e26\u5bbd\u8bbe\u7f6e\u4e0b\u4f1a\u6709\u663e\u8457\u5dee\u5f02\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 LoRa\u6280\u672f\u5982\u4f55\u62b5\u6297\u591a\u5f84\u8870\u843d\u548c\u5e72\u6270\u7684\u5177\u4f53\u673a\u5236<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u901a\u8fc7\u591a\u79cd\u673a\u5236\u6765\u62b5\u6297\u591a\u5f84\u8870\u843d\u548c\u5e72\u6270\uff0c\u5177\u4f53\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6269\u9891\u6280\u672f<\/strong>\uff1aLoRa\u91c7\u7528\u6269\u9891\u6280\u672f\u6765\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u3002\u6269\u9891\u6280\u672f\u901a\u8fc7\u589e\u52a0\u4fe1\u53f7\u5e26\u5bbd\uff0c\u5c06\u4fe1\u53f7\u80fd\u91cf\u5206\u6563\u5230\u66f4\u5bbd\u7684\u9891\u7387\u8303\u56f4\u5185\uff0c\u4ece\u800c\u964d\u4f4e\u5355\u4e2a\u9891\u7387\u70b9\u4e0a\u7684\u5e72\u6270\u5f71\u54cd\u3002\u6269\u9891\u56e0\u5b50(SF)\u662fLoRa\u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u51b3\u5b9a\u4e86\u4fe1\u53f7\u7684\u4f20\u8f93\u901f\u7387\u548c\u6297\u5e72\u6270\u80fd\u529b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u8df3\u9891\u673a\u5236<\/strong>\uff1aLoRa\u4f7f\u7528\u8df3\u9891\u6269\u9891\u901a\u4fe1(FHSS)\uff0c\u5373\u5728\u4e0d\u540c\u7684\u4fe1\u9053\u4e4b\u95f4\u5207\u6362\u53d1\u9001\u4fe1\u53f7\u3002\u8fd9\u79cd\u673a\u5236\u4f7f\u5f97LoRa\u80fd\u591f\u5728\u590d\u6742\u7684\u65e0\u7ebf\u73af\u5883\u4e2d\u907f\u514d\u7279\u5b9a\u4fe1\u9053\u4e0a\u7684\u5e72\u6270\uff0c\u4ece\u800c\u63d0\u9ad8\u901a\u4fe1\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u5bf9\u591a\u666e\u52d2\u9891\u79fb\u4e0d\u654f\u611f<\/strong>\uff1aLoRa\u6280\u672f\u5bf9\u591a\u666e\u52d2\u9891\u79fb\u4e0d\u654f\u611f\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u80fd\u591f\u66f4\u597d\u5730\u62b5\u6297\u7531\u4e8e\u7ec8\u7aef\u6216\u5468\u56f4\u73af\u5883\u79fb\u52a8\u5f15\u8d77\u7684\u591a\u5f84\u8870\u843d\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u81ea\u9002\u5e94\u7b97\u6cd5<\/strong>\uff1aLoRa\u8bbe\u5907\u80fd\u591f\u63a2\u6d4b\u5c04\u9891\u73af\u5883\uff0c\u5e76\u901a\u8fc7\u81ea\u9002\u5e94\u7b97\u6cd5\u9009\u62e9\u6700\u4f73\u7684\u901a\u4fe1\u4fe1\u9053\uff0c\u4ee5\u907f\u514d\u5e72\u6270\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u7f16\u7801\u4e0e\u89e3\u7801<\/strong>\uff1aLoRa\u5c06\u6570\u636e\u4fe1\u606f\u7f16\u7801\u5728chirp\u7684\u9891\u7387\u53d8\u5316\u4e2d\uff0c\u901a\u8fc7\u8c03\u6574chirp\u7684\u8d77\u59cb\u9891\u7387\u3001\u6301\u7eed\u65f6\u95f4\u548c\u5e45\u5ea6\u6765\u643a\u5e26\u4fe1\u606f\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u4fe1\u53f7\u5728\u63a5\u6536\u7aef\u53ef\u4ee5\u901a\u8fc7\u89e3\u7801\u6062\u590d\u539f\u59cb\u4fe1\u606f\uff0c\u800c\u4e0d\u4f1a\u88ab\u5176\u4ed6\u4fe1\u53f7\u5e72\u6270\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 LoRa\u6a21\u5757\u5728\u5b9e\u9645\u7269\u8054\u7f51(IoT)\u5e94\u7528\u4e2d\u7684\u529f\u8017\u8868\u73b0<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u5728\u5b9e\u9645\u7269\u8054\u7f51(IoT)\u5e94\u7528\u4e2d\u7684\u529f\u8017\u8868\u73b0\u901a\u5e38\u88ab\u8ba4\u4e3a\u662f\u4f18\u79c0\u7684\u3002\u6839\u636e\u591a\u9879\u8bc1\u636e\uff0cLoRa\u6a21\u5757\u4ee5\u5176\u4f4e\u529f\u8017\u8457\u79f0\uff0c\u8fd9\u4f7f\u5f97\u5b83\u975e\u5e38\u9002\u5408\u9700\u8981\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u5e94\u7528\u573a\u666f\u3002\u4f8b\u5982\uff0c\u67d0\u4e9bLoRa\u6a21\u5757\u7684\u529f\u8017\u53ef\u4ee5\u4f4e\u81f32uA\u3002\u6b64\u5916\uff0cLoRa\u6a21\u5757\u5728\u6df1\u4f11\u7720\u6a21\u5f0f\u4e0b\u7684\u529f\u8017\u4ec5\u4e3a1.7 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class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 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