{"id":98583,"date":"2024-10-29T13:52:25","date_gmt":"2024-10-29T05:52:25","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=98583"},"modified":"2024-10-29T13:52:28","modified_gmt":"2024-10-29T05:52:28","slug":"lfshjsylxj","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/98583.html","title":{"rendered":"LoRa\u53d1\u5c04\u548c\u63a5\u6536\u539f\u7406\u8be6\u89e3"},"content":{"rendered":"\n<p>\u3000\u3000<strong><a href=\"https:\/\/baike.baidu.com\/item\/LoRa\/58702571\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/baike.baidu.com\/item\/LoRa\/58702571\" rel=\"noreferrer noopener nofollow\">LoRa<\/a>(Long Range Radio)<\/strong>\u662f\u4e00\u79cd\u57fa\u4e8e\u6269\u9891\u6280\u672f\u7684\u4f4e\u529f\u8017\u3001\u8fdc\u8ddd\u79bb\u65e0\u7ebf\u901a\u4fe1\u6280\u672f\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7269\u8054\u7f51\u9886\u57df\u3002\u5176\u53d1\u5c04\u548c\u63a5\u6536\u539f\u7406\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u6570\u636e\u7f16\u7801<\/strong>\uff1a\u5728\u53d1\u9001\u7aef\uff0c\u6570\u636e\u9996\u5148\u88ab\u7f16\u7801\u6210\u6570\u5b57\u4fe1\u53f7\u3002\u8fd9\u4e00\u8fc7\u7a0b\u901a\u5e38\u6d89\u53ca\u5230\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63(ECC)\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6269\u9891\u8c03\u5236<\/strong>\uff1a\u7f16\u7801\u540e\u7684\u6570\u636e\u901a\u8fc7\u6269\u9891\u8c03\u5236\u6280\u672f\u8f6c\u6362\u4e3aLoRa\u7b26\u53f7\u3002\u6269\u9891\u8c03\u5236\u662f\u901a\u8fc7\u5c06\u6570\u636e\u5305\u5206\u6563\u5230\u591a\u4e2a\u5b50\u8f7d\u6ce2\u4e0a\u6765\u5b9e\u73b0\u7684\uff0c\u8fd9\u6837\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u548c\u4f20\u8f93\u8ddd\u79bb\u3002LoRa\u4f7f\u7528\u7684\u662f\u5541\u557e\u6269\u5c55\u9891\u8c31(CSS)\u8c03\u5236\u65b9\u5f0f\uff0c\u901a\u8fc7\u7ebf\u6027\u9891\u7387\u8c03\u5236(LFM)\u4ea7\u751f&#8221;\u5541\u557e&#8221;\u4fe1\u53f7\uff0c\u6bcf\u4e2a\u6570\u636e\u5305\u7684\u8f7d\u6ce2\u9891\u7387\u968f\u7740\u65f6\u95f4\u7ebf\u6027\u53d8\u5316\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4fe1\u53f7\u4f20\u8f93<\/strong>\uff1a\u6269\u9891\u540e\u7684\u4fe1\u53f7\u901a\u8fc7\u65e0\u7ebf\u5c04\u9891\u6a21\u5757\u53d1\u9001\u51fa\u53bb\u3002LoRa\u6a21\u5757\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u9891\u6bb5\u4e0a\u5de5\u4f5c\uff0c\u4f8b\u5982\u5728\u6b27\u6d32\u5e38\u7528868 MHz ISM\u9891\u6bb5\uff0c\u5728\u7f8e\u56fd\u5219\u4f7f\u7528915 MHz\u9891\u6bb5\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u63a5\u6536\u7aef\u5904\u7406<\/strong>\uff1a\u63a5\u6536\u7aef\u63a5\u6536\u5230\u4fe1\u53f7\u540e\uff0c\u4f1a\u8fdb\u884c\u89e3\u6269\u9891\u548c\u89e3\u8c03\u5236\u5904\u7406\uff0c\u5f97\u5230\u539f\u59cb\u7684\u6570\u636e\u4fe1\u53f7\u3002LoRa\u63a5\u6536\u5668\u80fd\u591f\u9501\u5b9a\u63a5\u6536\u5230\u7684\u5541\u557e\u4fe1\u53f7\uff0c\u5e76\u5229\u7528\u524d\u5411\u7ea0\u9519\u7f16\u7801(FEC)\u6765\u589e\u5f3a\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4fe1\u53f7\u8bc4\u4f30\u4e0e\u91cd\u4f20<\/strong>\uff1a\u63a5\u6536\u7aef\u4f1a\u5bf9\u4fe1\u53f7\u8d28\u91cf\u8fdb\u884c\u8bc4\u4f30\uff0c\u5e76\u6839\u636e\u8bc4\u4f30\u7ed3\u679c\u51b3\u5b9a\u662f\u5426\u9700\u8981\u91cd\u65b0\u53d1\u9001\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000<strong>LoRa\u6280\u672f\u7684\u4f18\u52bf\u5728\u4e8e\u5176\u9ad8\u7075\u654f\u5ea6\u548c\u4f4e\u529f\u8017\u7279\u6027\uff0c\u4f7f\u5f97\u5b83\u80fd\u591f\u5728\u4f4e\u53d1\u5c04\u529f\u7387\u7684\u60c5\u51b5\u4e0b\u5b9e\u73b0\u957f\u8ddd\u79bb\u901a\u4fe1\u3002\u6b64\u5916\uff0cLoRa\u652f\u6301\u591a\u79cd\u6269\u9891\u56e0\u5b50\u9009\u62e9\uff0c\u4ee5\u9002\u5e94\u4e0d\u540c\u7684\u4f20\u8f93\u901f\u7387\u548c\u8ddd\u79bb\u9700\u6c42\u3002<\/strong>\u8fd9\u79cd\u6280\u672f\u7279\u522b\u9002\u7528\u4e8e\u9700\u8981\u957f\u8ddd\u79bb\u3001\u4f4e\u529f\u8017\u901a\u4fe1\u7684\u5e94\u7528\u573a\u666f\uff0c\u5982\u667a\u6167\u57ce\u5e02\u3001\u519c\u4e1a\u76d1\u6d4b\u7b49\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 LoRa\u6280\u672f\u4e2d\u7684\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63(ECC)\u662f\u5982\u4f55\u5b9e\u73b0\u7684?<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u4e2d\u7684\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63(ECC)\u4e3b\u8981\u901a\u8fc7\u524d\u5411\u7ea0\u9519\u7f16\u7801(FEC)\u5b9e\u73b0\u3002LoRa\u8c03\u5236\u89e3\u8c03\u5668\u4f7f\u7528\u5faa\u73af\u5197\u4f59\u6821\u9a8c(CRC)\u6765\u68c0\u6d4b\u9519\u8bef\uff0c\u5e76\u5229\u7528\u5197\u4f59\u6570\u636e\u5728\u63a5\u6536\u7aef\u8fdb\u884c\u9519\u8bef\u7ea0\u6b63\u3002\u8fd9\u79cd\u524d\u5411\u7ea0\u9519\u7f16\u7801\u7279\u522b\u6709\u6548\u4e8e\u63d0\u9ad8\u94fe\u8def\u5728\u5e72\u6270\u73af\u5883\u4e0b\u7684\u53ef\u9760\u6027\u3002\u6b64\u5916\uff0cLoRa\u8fd8\u91c7\u7528\u4e86LDPC\u7f16\u7801\u7b49\u5176\u4ed6\u4fe1\u9053\u7f16\u7801\u6280\u672f\u6765\u8fdb\u4e00\u6b65\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5177\u4f53\u6765\u8bf4\uff0cLoRa\u8c03\u5236\u89e3\u8c03\u5668\u901a\u8fc7\u5faa\u73af\u8bef\u5dee\u6821\u6b63\u6765\u6267\u884c\u524d\u5411\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63\u3002\u867d\u7136\u524d\u5411\u7ea0\u9519(FEC)\u4e0d\u4f1a\u663e\u8457\u63d0\u9ad8\u8c03\u5236\u89e3\u8c03\u5668\u5728\u7a81\u53d1\u5e72\u6270\u4e0b\u7684\u7075\u654f\u5ea6\uff0c\u4f46\u5b83\u5728\u5b58\u5728\u5e72\u6270\u7684\u60c5\u51b5\u4e0b\u7279\u522b\u6709\u6548\u4e8e\u63d0\u9ad8\u94fe\u8def\u7684\u53ef\u9760\u6027\u3002\u7f16\u7801\u7387\u53ef\u4ee5\u6839\u636e\u4fe1\u9053\u6761\u4ef6\u8fdb\u884c\u8c03\u6574\uff0c\u5e76\u4e14\u53ef\u4ee5\u9009\u62e9\u5c06\u7f16\u7801\u7387\u5305\u542b\u5728\u6570\u636e\u5305\u5934\u90e8\u4e2d\u4f9b\u63a5\u6536\u5668\u4f7f\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 \u6269\u9891\u8c03\u5236\u5728LoRa\u901a\u4fe1\u4e2d\u5177\u4f53\u662f\u5982\u4f55\u5de5\u4f5c\u7684<\/h2>\n\n\n\n<p>\u3000\u3000\u6269\u9891\u8c03\u5236\u5728LoRa\u901a\u4fe1\u4e2d\u4e3b\u8981\u901a\u8fc7\u5541\u557e\u6269\u5c55\u9891\u8c31(CSS)\u6280\u672f\u5b9e\u73b0\u3002CSS\u8c03\u5236\u662f\u4e00\u79cd\u57fa\u4e8e\u6269\u9891\u8c03\u5236\u7684\u7ebf\u6027\u8c03\u5236\u65b9\u5f0f\uff0c\u5b83\u5c06\u6570\u636e\u8f6c\u5316\u4e3a\u4e00\u7cfb\u5217\u9891\u7387\u968f\u65f6\u95f4\u7ebf\u6027\u53d8\u5316\u7684\u4fe1\u53f7\uff0c\u8fd9\u4e9b\u4fe1\u53f7\u88ab\u79f0\u4e3a\u201c\u5541\u557e\u201d\u4fe1\u53f7\u3002\u6bcf\u4e2a\u5541\u557e\u4fe1\u53f7\u5728\u6240\u4f7f\u7528\u7684\u9891\u7387\u4fe1\u9053\u5185\u7ebf\u6027\u5730\u626b\u8fc7\u6574\u4e2a\u5e26\u5bbd\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5177\u4f53\u6765\u8bf4\uff0cCSS\u8c03\u5236\u6280\u672f\u901a\u8fc7\u751f\u6210\u4e00\u7cfb\u5217\u9891\u7387\u968f\u65f6\u95f4\u7ebf\u6027\u589e\u52a0\u6216\u51cf\u5c11\u7684\u5541\u557e\u4fe1\u53f7\u6765\u6269\u5c55\u539f\u59cb\u4fe1\u53f7\u7684\u5e26\u5bbd\u3002\u8fd9\u4e9b\u5541\u557e\u4fe1\u53f7\u5177\u6709\u8f83\u9ad8\u7684\u5e26\u5bbd\uff0c\u53ef\u4ee5\u5728\u8f83\u4f4e\u7684\u4fe1\u566a\u6bd4\u4e0b\u4f20\u8f93\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u548c\u7a7f\u900f\u80fd\u529b\u3002\u8fd9\u79cd\u8c03\u5236\u65b9\u5f0f\u4f7f\u5f97LoRa\u4fe1\u53f7\u80fd\u591f\u6709\u6548\u5229\u7528\u5168\u90e8\u5e26\u5bbd\uff0c\u514b\u670d\u4f20\u64ad\u8def\u5f84\u4e2d\u7684\u8870\u51cf\u548c\u5e72\u6270\uff0c\u5b9e\u73b0\u8fdc\u8ddd\u79bb\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728LoRa\u7269\u7406\u5c42\u4e2d\uff0cCSS\u8c03\u5236\u5bf9symbol\u8fdb\u884c\u8c03\u5236\uff0c\u5e76\u901a\u8fc7\u5085\u91cc\u53f6\u53d8\u6362\u8fdb\u884c\u89e3\u8c03\u3002LoRa\u4fe1\u53f7\u7531\u524d\u5bfc\u7801\u3001\u8d77\u59cb\u5e27\u5b9a\u754c\u7b26\u548c\u6570\u636e\u8f7d\u8377\u7ec4\u6210\uff0c\u5176\u4e2d\u524d\u5bfc\u7801\u5305\u542b\u82e5\u5e72\u4e0a\u884c\u5541\u557e\uff0c\u7528\u4e8e\u5b9e\u73b0\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u4e4b\u95f4\u7684\u540c\u6b65\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u6b64\u5916\uff0cLoRa\u4f7f\u7528\u6b63\u4ea4\u6269\u5c55\u56e0\u5b50\uff0c\u4f7f\u7f51\u7edc\u80fd\u591f\u901a\u8fc7\u5bf9\u5355\u4e2a\u7ec8\u7aef\u8282\u70b9\u7684\u529f\u7387\u6c34\u5e73\u548c\u6570\u636e\u901f\u7387\u8fdb\u884c\u81ea\u9002\u5e94\u4f18\u5316\u6765\u5ef6\u957f\u8fde\u63a5\u7ec8\u7aef\u8282\u70b9\u7684\u7535\u6c60\u5bff\u547d\u3002\u6269\u9891\u56e0\u5b50\u8d8a\u5927\uff0c\u7a7a\u4e2d\u6570\u636e\u901f\u7387\u8d8a\u6162;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 LoRa\u6a21\u5757\u5728\u4e0d\u540c\u9891\u6bb5\u4e0a\u7684\u5de5\u4f5c\u539f\u7406\u6709\u4f55\u5dee\u5f02<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u5728\u4e0d\u540c\u9891\u6bb5\u4e0a\u7684\u5de5\u4f5c\u539f\u7406\u5b58\u5728\u4e00\u4e9b\u5dee\u5f02\uff0c\u5c24\u5176\u662f\u5728\u6b27\u6d32\u5e38\u7528\u7684868 MHz\u548c\u7f8e\u56fd\u5e38\u7528\u7684915 MHz\u9891\u6bb5\u4e0a\u3002<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u57fa\u4e8eChirp Spread Spectrum (CSS) \u8c03\u5236\u6280\u672f\uff0c\u8fd9\u79cd\u6280\u672f\u901a\u8fc7\u5728\u8f83\u5bbd\u7684\u9891\u5e26\u4e0a\u53d1\u9001\u4fe1\u53f7\u6765\u62b5\u6297\u591a\u5f84\u8870\u843d\u548c\u5e72\u6270\u3002\u5728\u6b27\u6d32\u548c\u7f8e\u56fd\uff0cLoRa\u6a21\u5757\u5206\u522b\u4f7f\u7528868 MHz\u548c915 MHz\u9891\u6bb5\u8fdb\u884c\u901a\u4fe1\u3002\u8fd9\u4e24\u4e2a\u9891\u6bb5\u7684\u9009\u62e9\u4e3b\u8981\u662f\u7531\u4e8e\u5b83\u4eec\u5728\u5404\u81ea\u5730\u533a\u76f8\u5bf9\u8f83\u5c11\u7684\u9891\u7387\u62e5\u6324\u60c5\u51b5\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u6b27\u6d32\uff0cLoRa\u901a\u4fe1\u5fc5\u987b\u9075\u5b88\u4e25\u683c\u7684\u4f20\u8f93\u89c4\u5b9a\u3002\u4f8b\u5982\uff0c\u5728868 MHz\u9891\u6bb5\u4e2d\uff0c\u6bcf\u4e2a\u7ec8\u7aef\u8bbe\u5907\u5fc5\u987b\u5b9e\u73b0\u4e09\u4e2a125 kHz\u7684\u4fe1\u9053\uff0c\u5e76\u4e14\u5728867 MHz\u5b50\u9891\u6bb5\u4e2d\u8fd8\u6709\u4e94\u4e2a\u53ef\u9009\u7684125 kHz\u4fe1\u9053\u7528\u4e8eLoRa\u901a\u4fe1\u3002\u6b64\u5916\uff0c\u6839\u636e\u6b27\u76df\u7684\u89c4\u5b9a\uff0c\u4efb\u4f55\u4f20\u8f93\u90fd\u5fc5\u987b\u9075\u5faa1%\u7684\u65e0\u7ebf\u7535\u5360\u7a7a\u6bd4\u6216\u91c7\u7528\u76d1\u542c\u524d\u8bb2\u8bdd\u6216\u81ea\u9002\u5e94\u9891\u7387\u654f\u6377\u673a\u5236\u3002\u8fd9\u610f\u5473\u7740\u5982\u679c\u8bbe\u5907\u4f20\u8f93\u4e861\u79d2\uff0c\u5b83\u4e0d\u80fd\u5728\u63a5\u4e0b\u6765\u768499\u79d2\u5185\u518d\u6b21\u4f20\u8f93\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u800c\u5728\u7f8e\u56fd\uff0c\u867d\u7136\u6ca1\u6709\u4e25\u683c\u7684\u5360\u7a7a\u6bd4\u9650\u5236\uff0c\u4f46\u8bbe\u5907\u5fc5\u987b\u5728\u6bcf\u4e2a\u4fe1\u9053\u4e0a\u53ea\u5360\u7528400\u6beb\u79d2\uff0c\u5e76\u4e14\u5fc5\u987b\u8df3\u8fc7\u81f3\u5c1115\u4e2a\u4fe1\u9053\u4ee5\u907f\u514d\u5e72\u6270\u3002\u8fd9\u8868\u660e\u867d\u7136\u7f8e\u56fd\u7684LoRa\u7cfb\u7edf\u5728\u9891\u8c31\u4f7f\u7528\u4e0a\u66f4\u4e3a\u7075\u6d3b\uff0c\u4f46\u4ecd\u7136\u9700\u8981\u91c7\u53d6\u63aa\u65bd\u4ee5\u51cf\u5c11\u5bf9\u5176\u4ed6\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u7684\u5e72\u6270\u3002<\/p>\n\n\n\n<h2 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