{"id":100181,"date":"2024-12-31T17:22:41","date_gmt":"2024-12-31T09:22:41","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=100181"},"modified":"2024-12-31T17:22:46","modified_gmt":"2024-12-31T09:22:46","slug":"wxspynjzgztzfs","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/100181.html","title":{"rendered":"\u65e0\u7ebf\u5c04\u9891\u6709\u54ea\u51e0\u79cd\u5de5\u4f5c\u8c03\u5236\u65b9\u5f0f"},"content":{"rendered":"\n<p>\u3000\u3000<strong>\u65e0\u7ebf\u5c04\u9891(RF)\u7684\u5de5\u4f5c\u8c03\u5236\u65b9\u5f0f<\/strong>\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u5e45\u5ea6\u8c03\u5236\uff08AM\uff09<\/strong>&nbsp;\uff1a\u901a\u8fc7\u6539\u53d8\u8f7d\u6ce2\u4fe1\u53f7\u7684\u5e45\u5ea6\u6765\u4f20\u8f93\u4fe1\u606f\uff0c\u9002\u7528\u4e8e\u7b80\u5355\u7684\u65e0\u7ebf\u901a\u4fe1\u573a\u666f\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9891\u7387\u8c03\u5236\uff08FM\uff09<\/strong>&nbsp;\uff1a\u901a\u8fc7\u8c03\u6574\u8f7d\u6ce2\u4fe1\u53f7\u7684\u9891\u7387\u6765\u4f20\u8f93\u4fe1\u606f\uff0c\u5177\u6709\u8f83\u5f3a\u7684\u6297\u5e72\u6270\u80fd\u529b\uff0c\u5e38\u7528\u4e8e\u9700\u8981\u9ad8\u4fdd\u771f\u7684\u97f3\u9891\u4f20\u8f93\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u76f8\u4f4d\u8c03\u5236\uff08PM\uff09<\/strong>&nbsp;\uff1a\u901a\u8fc7\u6539\u53d8\u8f7d\u6ce2\u4fe1\u53f7\u7684\u76f8\u4f4d\u6765\u4f20\u8f93\u4fe1\u606f\uff0c\u9002\u7528\u4e8e\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4e8c\u8fdb\u5236\u9891\u79fb\u952e\u63a7\uff08FSK\uff09<\/strong>&nbsp;\uff1a\u901a\u8fc7\u6539\u53d8\u8f7d\u6ce2\u9891\u7387\u7684\u4e24\u4e2a\u72b6\u6001\u6765\u4f20\u8f93\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f4e\u529f\u8017\u548c\u7b80\u5355\u7535\u8def\u8bbe\u8ba1\u7684\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4e8c\u8fdb\u5236\u76f8\u79fb\u952e\u63a7\uff08PSK\uff09<\/strong>&nbsp;\uff1a\u901a\u8fc7\u6539\u53d8\u8f7d\u6ce2\u4fe1\u53f7\u7684\u76f8\u4f4d\u6765\u4f20\u8f93\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u9002\u7528\u4e8e\u9ad8\u6570\u636e\u901f\u7387\u7684\u573a\u666f\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u65af\u9891\u79fb\u952e\u63a7\uff08GFSK\uff09<\/strong>&nbsp;\uff1a\u662fFSK\u7684\u4e00\u79cd\u6539\u8fdb\u5f62\u5f0f\uff0c\u4f7f\u7528\u9ad8\u65af\u6ee4\u6ce2\u5668\u5e73\u6ed1\u9891\u7387\u8df3\u53d8\uff0c\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u548c\u4f20\u8f93\u6548\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6b63\u4ea4\u5e45\u5ea6\u8c03\u5236\uff08QAM\uff09<\/strong>&nbsp;\uff1a\u7ed3\u5408\u5e45\u5ea6\u548c\u76f8\u4f4d\u8c03\u5236\uff0c\u80fd\u591f\u5728\u4e00\u4e2a\u4fe1\u53f7\u4e2d\u4f20\u8f93\u66f4\u591a\u7684\u4fe1\u606f\uff0c\u9002\u7528\u4e8e\u5bbd\u5e26\u901a\u4fe1\u7cfb\u7edf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6269\u9891\u8c03\u5236<\/strong>\uff1a\u5305\u62ec\u76f4\u63a5\u5e8f\u5217\u6269\u9891(DSSS)\u548c\u8df3\u9891\u6269\u9891(FHSS)\uff0c\u901a\u8fc7\u6269\u5c55\u4fe1\u53f7\u9891\u8c31\u6765\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u548c\u5b89\u5168\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>LoRa\u8c03\u5236<\/strong>\uff1a\u4e00\u79cd\u6269\u9891\u8c03\u5236\u6280\u672f\uff0c\u5177\u6709\u4f4e\u529f\u8017\u3001\u8fdc\u8ddd\u79bb\u4f20\u8f93\u548c\u5f3a\u6297\u5e72\u6270\u80fd\u529b\uff0c\u9002\u7528\u4e8e\u7269\u8054\u7f51\u5e94\u7528\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u03c0\/4 DQPSK<\/strong>\u548c<strong>GMSK<\/strong>\uff1a\u8fd9\u4e9b\u662fPSK\u7684\u53d8\u79cd\uff0c\u7528\u4e8e\u63d0\u9ad8\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u548c\u6297\u5e72\u6270\u80fd\u529b\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u8fd9\u4e9b\u8c03\u5236\u65b9\u5f0f\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u9009\u62e9\u65f6\u9700\u6839\u636e\u5177\u4f53\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\u8fdb\u884c\u6743\u8861\uff0c\u4f8b\u5982\u4f20\u8f93\u8ddd\u79bb\u3001\u6570\u636e\u901f\u7387\u3001\u529f\u8017\u548c\u6297\u5e72\u6270\u80fd\u529b\u7b49\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 \u65e0\u7ebf\u5c04\u9891\u8c03\u5236\u65b9\u5f0f\u5728\u7269\u8054\u7f51\u5e94\u7528\u4e2d\u7684\u4f18\u52a3<\/h2>\n\n\n\n<p>\u3000\u3000\u65e0\u7ebf\u5c04\u9891\u8c03\u5236\u65b9\u5f0f\u5728\u7269\u8054\u7f51\u5e94\u7528\u4e2d\u7684\u5177\u4f53\u4f18\u52bf\u548c\u5c40\u9650\u6027\u53ef\u4ee5\u4ece\u591a\u4e2a\u65b9\u9762\u8fdb\u884c\u5206\u6790\u3002\u4ee5\u4e0b\u662f\u57fa\u4e8e\u6211\u641c\u7d22\u5230\u7684\u8d44\u6599\u7684\u8be6\u7ec6\u56de\u7b54\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u4f18\u52bf<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u4f4e\u529f\u8017<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u4ee5\u5176\u6781\u4f4e\u7684\u529f\u8017\u8457\u79f0\uff0c\u9002\u7528\u4e8e\u9700\u8981\u957f\u671f\u8fd0\u884c\u4e14\u7535\u6c60\u5bff\u547d\u8981\u6c42\u9ad8\u7684\u7269\u8054\u7f51\u8bbe\u5907\u3002\u4f8b\u5982\uff0cLoRa\u6a21\u5757\u5728\u76f8\u540c\u6570\u636e\u901f\u7387\u4e0b\uff0c\u6269\u9891\u8c03\u5236\u7684\u7075\u654f\u5ea6\u6bd4\u4f20\u7edf\u8c03\u5236\u65b9\u5f0f\u9ad8\u51fa8-10\u5206\u8d1d\uff0c\u9002\u7528\u4e8e\u8fdc\u8ddd\u79bb\u548c\u9ad8\u53ef\u9760\u6027\u8981\u6c42\u7684\u9879\u76ee\u3002<\/p>\n\n\n\n<p>\u3000\u3000Sub-1GHz\u9891\u6bb5\u7684\u65e0\u7ebf\u6280\u672f\u4e5f\u5177\u6709\u4f4e\u529f\u8017\u7684\u7279\u70b9\uff0c\u9002\u5408\u8986\u76d6\u8f83\u5927\u8303\u56f4\u7684\u7269\u8054\u7f51\u5e94\u7528\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u8fdc\u8ddd\u79bb\u4f20\u8f93<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u53ef\u4ee5\u5b9e\u73b0\u8fdc\u8ddd\u79bb\u901a\u4fe1\uff0c\u901a\u4fe1\u8ddd\u79bb\u53ef\u8fbe5\u5343\u7c73\uff0c\u8fd9\u4f7f\u5f97\u5b83\u975e\u5e38\u9002\u5408\u9700\u8981\u8986\u76d6\u5e7f\u6cdb\u533a\u57df\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u3000\u3000Sub-1GHz\u9891\u6bb5\u7684\u65e0\u7ebf\u6280\u672f\u540c\u6837\u5177\u6709\u8fdc\u8ddd\u79bb\u4f20\u8f93\u7684\u4f18\u52bf\uff0c\u9002\u5408\u62a5\u8b66\u5b89\u5168\u3001\u6570\u636e\u901a\u4fe1\u3001\u65e0\u7ebf\u9065\u63a7\u5668\u7b49\u5e94\u7528\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6297\u5e72\u6270\u80fd\u529b\u5f3a<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u91c7\u7528\u6269\u9891\u8c03\u5236\u6280\u672f\uff0c\u5177\u6709\u66f4\u5f3a\u7684\u6297\u5e72\u6270\u80fd\u529b\u548c\u524d\u5411\u7ea0\u9519\u6280\u672f\uff0c\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000FSK\u8c03\u5236\u65b9\u5f0f\u5728\u6297\u5e72\u6270\u65b9\u9762\u8868\u73b0\u4f18\u5f02\uff0c\u9002\u7528\u4e8e\u4e2d\u8fdc\u8ddd\u79bb\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u9ad8\u7075\u654f\u5ea6<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u5728\u76f8\u540c\u6570\u636e\u901f\u7387\u4e0b\u5177\u6709\u66f4\u9ad8\u7684\u63a5\u6536\u7075\u654f\u5ea6\uff0c\u9002\u7528\u4e8e\u8fdc\u8ddd\u79bb\u548c\u9ad8\u53ef\u9760\u6027\u8981\u6c42\u7684\u9879\u76ee\u3002<\/p>\n\n\n\n<p>\u3000\u3000FSK\u8c03\u5236\u65b9\u5f0f\u5728\u6297\u591a\u5f84\u5e72\u6270\u65b9\u9762\u5177\u6709\u4f18\u52bf\uff0c\u9002\u7528\u4e8e\u65e0\u7ebf\u652f\u4ed8\u548c\u667a\u80fd\u5236\u9020\u9886\u57df\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6210\u672c\u6548\u76ca<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u901a\u8fc7\u4f7f\u7528\u9ad8\u6548\u82af\u7247\u548c\u6269\u9891\u6280\u672f\uff0c\u964d\u4f4e\u4e86\u7f51\u7edc\u94fa\u8bbe\u6210\u672c\uff0c\u52a0\u901f\u4e86\u7269\u8054\u7f51\u7684\u666e\u53ca\u4e0e\u53d1\u5c55\u3002<\/p>\n\n\n\n<p>\u3000\u3000Sub-1GHz\u9891\u6bb5\u7684\u65e0\u7ebf\u6280\u672f\u6210\u672c\u8f83\u4f4e\uff0c\u5e02\u573a\u5b58\u91cf\u5927\uff0c\u878d\u5408\u4e0d\u540c\u6280\u672f\u8fde\u63a5\u4e0d\u540c\u5e94\u7528\u9886\u57df\uff0c\u4e3a\u7269\u8054\u7f51\u53d1\u5c55\u5f00\u8f9f\u65b0\u7a7a\u95f4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u5c40\u9650\u6027<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u7f51\u5173\u9700\u6c42<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u7684\u5e94\u7528\u9700\u8981\u65b0\u5efa\u4fbf\u643a\u5f0f\u7f51\u5173\uff0c\u5bf9\u4e8e\u91cd\u5927\u5de5\u4e1a\u5e94\u7528\uff0c\u53ef\u80fd\u9700\u8981\u4fe1\u53f7\u5854\u6216\u5de5\u4e1a\u57fa\u7ad9\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u9891\u8c31\u5e72\u6270<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u8fc7\u591a\u7684\u540c\u9891\u6bb5\u8bbe\u5907\u53ef\u80fd\u5bfc\u81f4\u76f8\u4e92\u5e72\u6270\uff0c\u5f71\u54cd\u901a\u4fe1\u8d28\u91cf\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6210\u672c\u95ee\u9898<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6a21\u5757\u7684\u4f7f\u7528\u6210\u672c\u76f8\u5bf9\u8f83\u9ad8\uff0c\u4e0e433M\u65e0\u7ebf\u6a21\u5757\u76f8\u6bd4\uff0c\u6027\u4ef7\u6bd4\u4e0d\u9ad8\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u7cfb\u7edf\u5b89\u5168\u6027\u548c\u9690\u79c1\u4fdd\u62a4<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u968f\u7740\u7269\u8054\u7f51\u6280\u672f\u7684\u53d1\u5c55\uff0c\u8d85\u9ad8\u9891RFID\u7cfb\u7edf\u9700\u8981\u5173\u6ce8\u7cfb\u7edf\u5b89\u5168\u6027\u548c\u9690\u79c1\u4fdd\u62a4\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6280\u672f\u878d\u5408\u4e0e\u6807\u51c6\u5316<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u5c3d\u7ba1RFID\u7cfb\u7edf\u7684\u8c03\u5236\u65b9\u5f0f\u6b63\u5728\u5411\u591a\u8c03\u5236\u65b9\u5f0f\u878d\u5408\u3001\u9ad8\u6548\u80fd\u4e0e\u4f4e\u529f\u8017\u5e76\u91cd\u3001\u5b89\u5168\u6027\u4e0e\u9690\u79c1\u4fdd\u62a4\u4ee5\u53ca\u6807\u51c6\u5316\u4e0e\u4e92\u64cd\u4f5c\u6027\u53d1\u5c55\uff0c\u4f46\u8fd9\u4e9b\u8d8b\u52bf\u4ecd\u9700\u8fdb\u4e00\u6b65\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u65e0\u7ebf\u5c04\u9891\u8c03\u5236\u65b9\u5f0f\u5728\u7269\u8054\u7f51\u5e94\u7528\u4e2d\u5177\u6709\u663e\u8457\u7684\u4f18\u52bf\uff0c\u5982\u4f4e\u529f\u8017\u3001\u8fdc\u8ddd\u79bb\u4f20\u8f93\u3001\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u548c\u9ad8\u7075\u654f\u5ea6\u7b49\u3002\u7136\u800c\uff0c\u8fd9\u4e9b\u6280\u672f\u4e5f\u5b58\u5728\u4e00\u4e9b\u5c40\u9650\u6027\uff0c\u5982\u7f51\u5173\u9700\u6c42\u3001\u9891\u8c31\u5e72\u6270\u3001\u6210\u672c\u95ee\u9898\u4ee5\u53ca\u7cfb\u7edf\u5b89\u5168\u6027\u548c\u9690\u79c1\u4fdd\u62a4\u7b49\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 \u6b63\u4ea4\u5e45\u5ea6\u8c03\u5236(QAM)\u4e0e\u5176\u4ed6\u8c03\u5236\u65b9\u5f0f\u5bf9\u6bd4\u6027\u80fd<\/h2>\n\n\n\n<p>\u3000\u3000\u6b63\u4ea4\u5e45\u5ea6\u8c03\u5236(QAM)\u5728\u5bbd\u5e26\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7684\u6027\u80fd\u8868\u73b0\u4f18\u4e8e\u8bb8\u591a\u5176\u4ed6\u8c03\u5236\u65b9\u5f0f\uff0c\u4e3b\u8981\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u9891\u8c31\u5229\u7528\u7387\u9ad8<\/strong>\uff1aQAM\u901a\u8fc7\u540c\u65f6\u8c03\u8282\u4fe1\u53f7\u7684\u5e45\u5ea6\u548c\u76f8\u4f4d\uff0c\u80fd\u591f\u5728\u6709\u9650\u7684\u5e26\u5bbd\u5185\u4f20\u8f93\u66f4\u591a\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c16-QAM\u300164-QAM\u7b49\u9ad8\u9636QAM\u8c03\u5236\u65b9\u5f0f\u53ef\u4ee5\u6bcf\u4e2a\u7b26\u53f7\u4f20\u8f93\u66f4\u591a\u7684\u6bd4\u7279\uff0c\u4ece\u800c\u663e\u8457\u63d0\u9ad8\u9891\u8c31\u6548\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6297\u5e72\u6270\u80fd\u529b\u5f3a<\/strong>\uff1aQAM\u7684\u4fe1\u53f7\u70b9\u5747\u5300\u5206\u5e03\u5728\u4fe1\u53f7\u5e73\u9762\u4e0a\uff0c\u800c\u4e0d\u662f\u9650\u5236\u5728\u5706\u5468\u4e0a\uff0c\u8fd9\u4f7f\u5f97\u5176\u6700\u5c0f\u4fe1\u53f7\u8ddd\u79bb\u6700\u5927\u5316\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u6297\u5e72\u6270\u80fd\u529b\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0cMPSK(\u591a\u8fdb\u5236\u76f8\u79fb\u952e\u63a7)\u7684\u4fe1\u53f7\u70b9\u5206\u5e03\u5728\u5706\u5468\u4e0a\uff0c\u968f\u7740M\u503c\u7684\u589e\u5927\uff0c\u4fe1\u53f7\u6700\u5c0f\u8ddd\u79bb\u6025\u5267\u51cf\u5c0f\uff0c\u5f71\u54cd\u4e86\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6570\u636e\u4f20\u8f93\u901f\u7387\u9ad8<\/strong>\uff1aQAM\u80fd\u591f\u5728\u4e00\u4e2a\u7b26\u53f7\u4e2d\u4f20\u8f93\u591a\u4e2a\u6bd4\u7279\uff0c\u8fd9\u4f7f\u5f97\u5176\u6570\u636e\u4f20\u8f93\u901f\u7387\u8fdc\u9ad8\u4e8e\u4f20\u7edf\u7684\u4e8c\u8fdb\u5236\u8c03\u5236\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c64-QAM\u53ef\u4ee5\u6bcf\u4e2a\u7b26\u53f7\u4f20\u8f936\u4e2a\u6bd4\u7279\uff0c\u800c1024-QAM\u53ef\u4ee5\u6bcf\u4e2a\u7b26\u53f7\u4f20\u8f9310\u4e2a\u6bd4\u7279\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u9ad8\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9002\u5e94\u6027\u5f3a<\/strong>\uff1aQAM\u53ef\u4ee5\u6839\u636e\u4fe1\u9053\u6761\u4ef6\u8fdb\u884c\u81ea\u9002\u5e94\u8c03\u6574\u3002\u5728\u4fe1\u53f7\u6761\u4ef6\u826f\u597d\u65f6\uff0c\u7cfb\u7edf\u53ef\u4ee5\u4f7f\u7528\u66f4\u9ad8\u7684QAM\u7ea7\u522b(\u59821024-QAM\u6216\u66f4\u9ad8)\uff0c\u800c\u5728\u6761\u4ef6\u4e0d\u5229\u65f6\uff0c\u53ef\u4ee5\u964d\u4f4e\u5230\u8f83\u4f4e\u7684QAM\u7ea7\u522b\u4ee5\u4fdd\u6301\u4f20\u8f93\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u5e7f\u6cdb\u5e94\u7528<\/strong>\uff1aQAM\u5728\u591a\u79cd\u901a\u4fe1\u7cfb\u7edf\u4e2d\u5f97\u5230\u5e7f\u6cdb\u5e94\u7528\uff0c\u5305\u62ec\u6570\u5b57\u7535\u89c6\u3001\u6709\u7ebf\u7535\u89c6\u7f51\u7edc\u3001\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf(\u5982Wi-Fi\u548c\u8702\u7a9d\u7f51\u7edc)\u7b49\u3002\u5b83\u5728\u73b0\u4ee3\u5bbd\u5e26\u901a\u4fe1\u7cfb\u7edf\u4e2d\u662f\u5173\u952e\u7684\u6280\u672f\u4e4b\u4e00\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u7136\u800c\uff0cQAM\u4e5f\u5b58\u5728\u4e00\u4e9b\u7f3a\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u5bf9\u566a\u58f0\u654f\u611f<\/strong>\uff1a\u968f\u7740QAM\u7ea7\u522b\u7684\u63d0\u9ad8\uff0c\u661f\u5ea7\u70b9\u4e4b\u95f4\u7684\u95f4\u8ddd\u53d8\u5f97\u66f4\u52a0\u7d27\u5bc6\uff0c\u4f7f\u7cfb\u7edf\u66f4\u5bb9\u6613\u53d7\u5230\u566a\u58f0\u548c\u9519\u8bef\u7684\u5f71\u54cd\u3002\u56e0\u6b64\uff0c\u66f4\u9ad8\u7684QAM\u7ea7\u522b\u9700\u8981\u66f4\u597d\u7684\u4f20\u8f93\u901a\u9053\u8d28\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u8bbe\u5907\u590d\u6742\u5ea6\u9ad8<\/strong>\uff1aQAM\u9700\u8981\u590d\u6742\u7684\u4fe1\u53f7\u5904\u7406\u80fd\u529b\uff0c\u8bbe\u5907\u590d\u6742\u5ea6\u8f83\u9ad8\u3002\u8fd9\u589e\u52a0\u4e86\u7cfb\u7edf\u7684\u6210\u672c\u548c\u5b9e\u73b0\u96be\u5ea6\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9700\u8981\u7ebf\u6027\u653e\u5927\u5668<\/strong>\uff1a\u4e3a\u4e86\u4fdd\u6301\u4fe1\u53f7\u7684\u7ebf\u6027\uff0cQAM\u5728\u63a5\u6536\u5668\u4e2d\u9700\u8981\u4f7f\u7528\u7ebf\u6027\u653e\u5927\u5668\uff0c\u8fd9\u8fdb\u4e00\u6b65\u589e\u52a0\u4e86\u7cfb\u7edf\u7684\u590d\u6742\u6027\u548c\u6210\u672c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u603b\u4f53\u800c\u8a00\uff0cQAM\u5728\u5bbd\u5e26\u901a\u4fe1\u7cfb\u7edf\u4e2d\u8868\u73b0\u51fa\u8272\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u9ad8\u6570\u636e\u4f20\u8f93\u901f\u7387\u548c\u9ad8\u9891\u8c31\u5229\u7528\u7387\u7684\u5e94\u7528\u573a\u666f\u4e2d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 \u6269\u9891\u8c03\u5236\u6280\u672f(\u5982DSSS\u548cFHSS)\u6297\u5e72\u6270\u80fd\u529b\u548c\u5b89\u5168\u6027?<\/h2>\n\n\n\n<p>\u3000\u3000\u6269\u9891\u8c03\u5236\u6280\u672f(\u5982DSSS\u548cFHSS)\u5728\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u548c\u5b89\u5168\u6027\u65b9\u9762\u7684\u673a\u5236\u5982\u4e0b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u76f4\u63a5\u5e8f\u5217\u6269\u9891(DSSS)<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000DSSS\u901a\u8fc7\u5c06\u6570\u636e\u6d41\u4e0e\u4e00\u4e2a\u9ad8\u9891\u7387\u7684\u4f2a\u968f\u673a\u566a\u58f0\u5e8f\u5217(\u79f0\u4e3a\u6269\u9891\u7801)\u8fdb\u884c\u6309\u4f4d\u201c\u5f02\u6216\u201d\u64cd\u4f5c\uff0c\u5c06\u4fe1\u53f7\u6269\u5c55\u5230\u6bd4\u539f\u59cb\u4fe1\u53f7\u5e26\u5bbd\u66f4\u5927\u7684\u9891\u5e26\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u63a5\u6536\u7aef\u4f7f\u7528\u540c\u6837\u7684PN\u7801\u8fdb\u884c\u89e3\u6269\uff0c\u53ef\u4ee5\u6709\u6548\u62b5\u5fa1\u7a84\u5e26\u5e72\u6270\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6297\u5e72\u6270\u80fd\u529b<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u7531\u4e8e\u4fe1\u53f7\u88ab\u6269\u5c55\u5230\u8f83\u5bbd\u7684\u9891\u5e26\uff0c\u5982\u679c\u67d0\u4e2a\u9891\u6bb5\u53d7\u5e72\u6270\uff0c\u6570\u636e\u4ecd\u7136\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u9891\u6bb5\u6b63\u5e38\u4f20\u8f93\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u7a84\u5e26\u5e72\u6270\u4fe1\u53f7\u7ecf\u8fc7\u4f2a\u566a\u58f0\u7801\u8c03\u5236\u540e\u5c55\u5bbd\uff0c\u8c31\u5bc6\u5ea6\u964d\u4f4e\uff0c\u800c\u76f4\u6269\u4fe1\u53f7\u89e3\u6269\u540e\u53d8\u6210\u7a84\u5e26\u4fe1\u606f\uff0c\u589e\u76ca\u63d0\u9ad8\u3002<\/p>\n\n\n\n<p>\u3000\u3000DSSS\u7684\u6297\u5e72\u6270\u6027\u80fd\u8f83\u5f3a\uff0c\u7279\u522b\u662f\u5728\u6297\u591a\u5f84\u5e72\u6270\u65b9\u9762\u8868\u73b0\u7a81\u51fa\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u5b89\u5168\u6027<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000DSSS\u4fe1\u53f7\u529f\u7387\u8c31\u5bc6\u5ea6\u4f4e\uff0c\u96be\u4ee5\u88ab\u68c0\u6d4b\uff0c\u5177\u6709\u5f88\u5f3a\u7684\u9690\u853d\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u672a\u6388\u6743\u7528\u6237\u65e0\u6cd5\u89e3\u7801\u672a\u5305\u542b\u6269\u9891\u56e0\u5b50\u7684\u4fe1\u53f7\uff0c\u76f8\u5f53\u4e8e\u566a\u58f0\u6216\u5e72\u6270\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u8df3\u9891\u6269\u9891(FHSS)<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000FHSS\u901a\u8fc7\u4f2a\u968f\u673a\u5e8f\u5217\u63a7\u5236\u4fe1\u606f\u8f7d\u6ce2\uff0c\u4f7f\u4e2d\u5fc3\u9891\u7387\u4e0d\u65ad\u8df3\u8dc3\u6539\u53d8\uff0c\u6bcf\u4e2a\u5206\u7ec4\u91c7\u7528\u4e0d\u540c\u9891\u7387\u4f20\u8f93\uff0c\u5b9e\u73b0\u5bbd\u5e26\u6269\u9891\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u63a5\u6536\u7aef\u4f7f\u7528\u76f8\u540c\u7684\u4f2a\u968f\u673a\u5e8f\u5217\u6062\u590d\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6297\u5e72\u6270\u80fd\u529b<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u4fe1\u53f7\u5728\u591a\u4e2a\u9891\u7387\u4e4b\u4e2d\u4e0d\u65ad\u5207\u6362\uff0c\u4f7f\u5f97\u7a84\u5e26\u5e72\u6270\u53ea\u80fd\u5f71\u54cd\u6574\u4e2a\u901a\u4fe1\u65f6\u6bb5\u7684\u4e00\u5c0f\u90e8\u5206\uff0c\u4ece\u800c\u964d\u4f4e\u6574\u4f53\u5e72\u6270\u7a0b\u5ea6\u3002<\/p>\n\n\n\n<p>\u3000\u3000FHSS\u5728\u5bbd\u9891\u5e26\u8303\u56f4\u5185\u4f20\u9001\u77ed\u8109\u51b2\u4fe1\u53f7\uff0c\u6297\u5e72\u6270\u6027\u80fd\u66f4\u597d\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u5b89\u5168\u6027<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000FHSS\u901a\u8fc7\u5feb\u901f\u53d8\u5316\u9891\u7387\u6765\u589e\u5f3a\u6297\u5e72\u6270\u80fd\u529b\uff0c\u4f8b\u5982DJI\u589e\u5f3a\u6269\u9891\u6280\u672f(DESST)\u91c7\u7528\u4e86FHSS\u534f\u8bae\uff0c\u901a\u8fc7\u5728\u591a\u4e2a\u4fe1\u9053\u4e0a\u8fdb\u884c\u9891\u7387\u8df3\u8dc3\u6765\u907f\u514d\u88ab\u654c\u65b9\u5e72\u6270\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003. \u603b\u7ed3<\/h3>\n\n\n\n<p>\u3000\u3000<strong>DSSS<\/strong>\uff1a\u901a\u8fc7\u6269\u5c55\u4fe1\u53f7\u5e26\u5bbd\u548c\u4f7f\u7528\u4f2a\u968f\u673a\u7801\u8fdb\u884c\u89e3\u6269\uff0c\u6709\u6548\u6291\u5236\u7a84\u5e26\u5e72\u6270\uff0c\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u548c\u9690\u853d\u6027\u3002\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u4f20\u8f93\u901f\u7387\u548c\u6297\u591a\u5f84\u5e72\u6270\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>FHSS<\/strong>\uff1a\u901a\u8fc7\u5feb\u901f\u8df3\u53d8\u9891\u7387\uff0c\u5206\u6563\u5e72\u6270\u5f71\u54cd\uff0c\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u3002\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u9690\u853d\u6027\u548c\u6297\u591a\u9891\u5e72\u6270\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 LoRa\u8c03\u5236\u6280\u672f\u5728\u8fdc\u8ddd\u79bb\u4f20\u8f93\u548c\u4f4e\u529f\u8017\u65b9\u9762\u7684\u539f\u7406<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u8c03\u5236\u6280\u672f\u662f\u4e00\u79cd\u4e13\u4e3a\u7269\u8054\u7f51\u8bbe\u8ba1\u7684\u8fdc\u8ddd\u79bb\u3001\u4f4e\u529f\u8017\u65e0\u7ebf\u901a\u4fe1\u6280\u672f\uff0c\u5176\u6838\u5fc3\u5728\u4e8e\u7ebf\u6027\u8c03\u9891\u6269\u9891(CSS)\u6280\u672f\u3002\u8fd9\u79cd\u6280\u672f\u901a\u8fc7\u5728\u5bbd\u5e26\u5185\u7ebf\u6027\u8c03\u5236\u9891\u7387\uff0c\u4f7f\u5f97\u4fe1\u53f7\u80fd\u591f\u5728\u66f4\u5bbd\u7684\u9891\u8c31\u4e0a\u4f20\u8f93\uff0c\u4ece\u800c\u5b9e\u73b0\u957f\u8ddd\u79bb\u901a\u4fe1\u548c\u4f4e\u529f\u8017\u7279\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. LoRa\u8c03\u5236\u6280\u672f\u7684\u539f\u7406<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u7ebf\u6027\u8c03\u9891\u6269\u9891\uff08CSS\uff09<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u7684\u6838\u5fc3\u662f\u57fa\u4e8eCSS\u7684\u6269\u9891\u8c03\u5236\u6280\u672f\u3002CSS\u901a\u8fc7\u7ebf\u6027\u589e\u52a0\u6216\u51cf\u5c11\u9891\u7387\u6765\u7f16\u7801\u4fe1\u606f\uff0c\u4f7f\u5f97\u4fe1\u53f7\u80fd\u591f\u5728\u6709\u969c\u788d\u7269\u7684\u57ce\u5e02\u73af\u5883\u4e2d\u5b9e\u73b02-5\u516c\u91cc\u7684\u8fdc\u8ddd\u79bb\u4f20\u8f93\uff0c\u5728\u7406\u60f3\u6761\u4ef6\u4e0b\u751a\u81f3\u53ef\u4ee5\u8fbe\u523010\u516c\u91cc\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u8fd9\u79cd\u8c03\u5236\u65b9\u5f0f\u5141\u8bb8\u4fe1\u53f7\u5728\u5bbd\u5e26\u5185\u7ebf\u6027\u8c03\u5236\u9891\u7387\uff0c\u4ece\u800c\u8986\u76d6\u5e7f\u6cdb\u7684\u9891\u7387\u8303\u56f4\uff0c\u63d0\u9ad8\u4e86\u6297\u5e72\u6270\u80fd\u529b\uff0c\u5e76\u652f\u6301\u957f\u8ddd\u79bb\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u524d\u5411\u7ea0\u9519\uff08FEC\uff09<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u6280\u672f\u8fd8\u878d\u5408\u4e86\u524d\u5411\u7ea0\u9519(FEC)\u6280\u672f\uff0c\u5982Reed Solomon\u6216Hadamard\u7f16\u7801\uff0c\u7528\u4e8e\u6dfb\u52a0\u5197\u4f59\u6570\u636e\uff0c\u786e\u4fdd\u6570\u636e\u7684\u51c6\u786e\u63a5\u6536\u548c\u89e3\u5bc6\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u8fd9\u79cd\u6280\u672f\u663e\u8457\u63d0\u9ad8\u4e86\u63a5\u6536\u7075\u654f\u5ea6\uff0c\u4f7f\u5f97LoRa\u5728\u7b49\u540c\u7684\u6570\u636e\u901f\u7387\u6761\u4ef6\u4e0b\uff0c\u5176\u7075\u654f\u5ea6\u6bd4\u4f20\u7edfFSK\u8c03\u5236\u65b9\u5f0f\u9ad88-10dB\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u4f4e\u6bd4\u7279\u7387\u4f20\u8f93<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u8bbe\u5907\u901a\u5e38\u4f7f\u7528\u4f4e\u6bd4\u7279\u7387\u4f20\u8f93\uff0c\u5e76\u4e14\u5728\u4f4e\u4e8eGHz\u9891\u6bb5\u5de5\u4f5c\uff0c\u7b26\u5408\u5f53\u5730\u6cd5\u89c4\u8981\u6c42\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u4f4e\u6bd4\u7279\u7387\u4f20\u8f93\u4e0d\u4ec5\u964d\u4f4e\u4e86\u529f\u8017\uff0c\u8fd8\u63d0\u9ad8\u4e86\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u548c\u4f20\u8f93\u8ddd\u79bb\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. LoRa\u4e0e\u5176\u4ed6\u6269\u9891\u8c03\u5236\u6280\u672f\u7684\u6bd4\u8f83<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u4e0eFSK\/GFSK\u7684\u6bd4\u8f83<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u8c03\u5236\u6bd4FSK\/GFSK\u8c03\u5236\u65b9\u5f0f\u901a\u4fe1\u8ddd\u79bb\u8fdc10\u500d\u5de6\u53f3\u3002<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u4fdd\u6301\u4e86\u4f4e\u529f\u8017\u7279\u6027\u5e76\u663e\u8457\u589e\u52a0\u4e86\u901a\u4fe1\u8ddd\u79bb\uff0c\u4e3a\u4f7f\u7528\u8005\u63d0\u4f9b\u4e86\u4e00\u79cd\u5b9e\u73b0\u8fdc\u8ddd\u79bb\u3001\u4f4e\u529f\u8017\u3001\u5927\u5bb9\u91cf\u7cfb\u7edf\u7684\u7b80\u5355\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u4e0eZigbee\u3001Wi-Fi\u3001NB-IoT\u7684\u6bd4\u8f83<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u5728\u4f20\u8f93\u8ddd\u79bb\u3001\u529f\u8017\u3001\u6210\u672c\u53ca\u7f51\u7edc\u5bb9\u91cf\u65b9\u9762\u5177\u6709\u663e\u8457\u4f18\u52bf\u3002\u4f8b\u5982\uff0cLoRa\u7684\u6700\u5927\u4f20\u8f93\u8ddd\u79bb\u53ef\u8fbe\u6570\u516c\u91cc\uff0c\u9002\u7528\u4e8e\u57ce\u5e02\u3001\u90ca\u533a\u751a\u81f3\u504f\u8fdc\u5730\u533a\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u76f8\u6bd4\u4e4b\u4e0b\uff0cZigbee\u548cWi-Fi\u5728\u4f20\u8f93\u8ddd\u79bb\u548c\u529f\u8017\u65b9\u9762\u4e0d\u5982LoRa\uff0c\u800cNB-IoT\u867d\u7136\u5728\u4f4e\u529f\u8017\u65b9\u9762\u8868\u73b0\u4f18\u5f02\uff0c\u4f46\u5728\u4f20\u8f93\u8ddd\u79bb\u4e0a\u4ecd\u4e0d\u53caLoRa\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003. 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class=\"wp-block-heading\">\u3000\u3000\u4e94\u3001 \u03c0\/4 DQPSK\u548cGMSK\u8c03\u5236\u65b9\u5f0f\u7684\u4f20\u8f93\u8d28\u91cf\u548c\u6297\u5e72\u6270\u80fd\u529b?<\/h2>\n\n\n\n<p>\u3000\u3000\u03c0\/4 DQPSK\u548cGMSK\u8c03\u5236\u65b9\u5f0f\u901a\u8fc7\u4e0d\u540c\u7684\u6280\u672f\u624b\u6bb5\u63d0\u9ad8\u4e86\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u548c\u6297\u5e72\u6270\u80fd\u529b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u03c0\/4 DQPSK\u8c03\u5236\u65b9\u5f0f<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u9891\u8c31\u7279\u6027\u597d<\/strong>\uff1a\u03c0\/4 DQPSK\u8c03\u5236\u65b9\u5f0f\u5728\u9891\u8c31\u7279\u6027\u4e0a\u8868\u73b0\u4f18\u5f02\uff0c\u80fd\u591f\u6709\u6548\u5229\u7528\u9891\u8c31\u8d44\u6e90\uff0c\u51cf\u5c11\u9891\u8c31\u6d6a\u8d39\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u6297\u591a\u666e\u52d2\u9891\u79fb<\/strong>\uff1a\u7531\u4e8e\u5176\u9891\u8c31\u7279\u6027\u826f\u597d\uff0c\u03c0\/4 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