{"id":99405,"date":"2024-11-21T09:54:44","date_gmt":"2024-11-21T01:54:44","guid":{"rendered":"\/\/www.viralrail.com\/?p=99405"},"modified":"2024-11-21T09:54:48","modified_gmt":"2024-11-21T01:54:48","slug":"lxhjcgzff","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/99405.html","title":{"rendered":"LORA\u4fe1\u53f7\u68c0\u6d4b\u8ddf\u8e2a\u65b9\u6cd5"},"content":{"rendered":"\n<p>\u3000\u3000<strong>LoRa\u4fe1\u53f7\u68c0\u6d4b\u548c\u8ddf\u8e2a\u65b9\u6cd5<\/strong>\u6d89\u53ca\u591a\u79cd\u6280\u672f\u548c\u7b97\u6cd5\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u4fe1\u9053\u6d3b\u52a8\u68c0\u6d4b\u5668\uff08CAD\uff09<\/strong>&nbsp;\uff1aCAD\u662f\u4e00\u79cd\u7528\u4e8e\u68c0\u6d4bLoRa\u4fe1\u53f7\u7684\u5b58\u5728\u7684\u91cd\u8981\u6280\u672f\u3002CAD\u901a\u8fc7\u5feb\u901f\u626b\u63cf\u9891\u6bb5\u6765\u68c0\u6d4bLoRa\u6570\u636e\u5305\u7684\u524d\u5bfc\u7801\uff0c\u8fd9\u79cd\u65b9\u6cd5\u6bd4\u4f20\u7edf\u7684RSSI\u65b9\u6cd5\u66f4\u5feb\u3001\u66f4\u53ef\u9760\uff0c\u9002\u7528\u4e8e\u4f4e\u529f\u8017\u8bbe\u5907\u5728\u6df1\u5ea6\u7761\u7720\u6a21\u5f0f\u4e0b\u7684\u5524\u9192\u3002CAD\u6a21\u5f0f\u80fd\u591f\u6709\u6548\u5730\u68c0\u6d4b\u65e0\u7ebf\u4fe1\u9053\u4e0a\u7684LoRa\u524d\u5bfc\u7801\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9\u4fe1\u9053\u7684\u5b9e\u65f6\u76d1\u6d4b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4fe1\u53f7\u5f3a\u5ea6\u6307\u793a\u5668\uff08RSSI\uff09<\/strong>&nbsp;\uff1aRSSI\u5e38\u7528\u4e8e\u8bc4\u4f30\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u5f3a\u5ea6\uff0c\u4ece\u800c\u5224\u65adLoRa\u4fe1\u53f7\u7684\u5b58\u5728\u3002\u7136\u800c\uff0c\u5728\u590d\u6742\u7684\u7535\u78c1\u73af\u5883\u4e2d\uff0c\u5c24\u5176\u662f\u5728\u4f4e\u4fe1\u566a\u6bd4\u6761\u4ef6\u4e0b\uff0c\u57fa\u4e8eRSSI\u7684\u65b9\u6cd5\u53ef\u80fd\u4f1a\u53d7\u5230\u5e72\u6270\uff0c\u5bfc\u81f4\u8bc6\u522b\u6027\u80fd\u4e0b\u964d\u3002\u56e0\u6b64\uff0c\u4e00\u4e9b\u7cfb\u7edf\u7ed3\u5408\u4e86CAD\u548cRSSI\u7684\u65b9\u6cd5\uff0c\u4ee5\u63d0\u9ad8\u68c0\u6d4b\u7684\u51c6\u786e\u6027\u548c\u9c81\u68d2\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u7edf\u8ba1\u673a\u5668\u5b66\u4e60\u7684\u4fe1\u53f7\u68c0\u6d4b<\/strong>\uff1a\u8fd9\u79cd\u65b9\u6cd5\u5229\u7528\u7edf\u8ba1\u673a\u5668\u5b66\u4e60\u6a21\u578b\u5bf9\u4fe1\u53f7\u8fdb\u884c\u5206\u6790\uff0c\u4ee5\u8bc6\u522bLoRa\u4fe1\u53f7\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u63d0\u53d6\u4fe1\u53f7\u7684\u7279\u5f81\u5e76\u4f7f\u7528KNN\u6a21\u578b\u548c\u903b\u8f91\u56de\u5f52\u6a21\u578b\u8fdb\u884c\u5206\u7c7b\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u8bc6\u522b\u5408\u6cd5\u8bbe\u5907\u548c\u5f02\u5e38\u8bbe\u5907\u3002\u6b64\u5916\uff0c\u57fa\u4e8e\u6df1\u5ea6\u5b66\u4e60\u7684\u65b9\u6cd5\u4e5f\u88ab\u7528\u4e8e\u81ea\u52a8\u68c0\u6d4bLoRa\u4fe1\u53f7\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u9700\u8981\u590d\u6742\u7684\u4fe1\u53f7\u5904\u7406\uff0c\u8ba1\u7b97\u5f00\u9500\u8f83\u4f4e\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u76f8\u4f4d\u5bf9\u9f50\u548c\u9891\u7387\u5305\u7edc\u8ddf\u8e2a<\/strong>\uff1a\u4e3a\u4e86\u6d88\u9664\u7531\u4e8e\u6b63\u4ea4\u5207\u6362\u5f15\u8d77\u7684\u8bef\u62a5\uff0c\u53ef\u4ee5\u91c7\u7528\u4e24\u6b65\u76f8\u4f4d\u5bf9\u9f50\u7b97\u6cd5\u3002\u9996\u5148\u68c0\u67e5\u6bcf\u4e2aLoRa\u7b26\u53f7\u7684\u8fb9\u754c\uff0c\u5e76\u8c03\u6574\u5269\u4f59\u4fe1\u53f7\u6837\u672c\u7684\u76f8\u4f4d\u4ee5\u4f7f\u5176\u4e0e\u524d\u4e00\u4e2aLoRa\u7b26\u53f7\u7684\u76f8\u4f4d\u5bf9\u9f50\u3002\u7136\u540e\u901a\u8fc7\u91cd\u5efa\u8f7d\u6ce2\u7b26\u53f7\u6765\u5b9a\u4f4d\u7531\u9891\u7387\u5305\u7edc\u5f15\u8d77\u7684\u76f8\u4f4d\u8df3\u8dc3\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9LoRa\u56de\u4f20\u4fe1\u53f7\u7684\u68c0\u6d4b\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u591a\u7b26\u53f7\u901f\u7387\u68c0\u6d4b<\/strong>\uff1a\u5728\u591a\u7b26\u53f7\u901f\u7387\u4e0b\uff0c\u901a\u8fc7\u6301\u7eed\u76d1\u6d4b\u8f93\u5165\u4fe1\u53f7\u7684RSSI\u4fe1\u53f7\u5f3a\u5ea6\u6765\u8bc4\u4f30\u4fe1\u53f7\u7684\u80fd\u91cf\u5927\u5c0f\uff0c\u5e76\u6839\u636e\u80fd\u91cf\u9608\u503c\u5224\u65ad\u662f\u5426\u5b58\u5728LoRa\u6570\u636e\u3002\u8fd9\u79cd\u65b9\u6cd5\u80fd\u591f\u5373\u65f6\u8bc6\u522b\u79fb\u52a8\u65b9\u5411\uff0c\u5e76\u901a\u8fc7\u4e0d\u540c\u6570\u91cf\u7684\u4fe1\u53f7\u6837\u672c\u8fdb\u884c\u884c\u8d70\u65b9\u5411\u4f30\u8ba1\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u57fa\u4e8e\u7269\u7406\u6307\u7eb9\u7684\u8bc6\u522b<\/strong>\uff1a\u5229\u7528\u5dee\u5206\u661f\u5ea7\u8f68\u8ff9\u56fe\u7b49\u7269\u7406\u6307\u7eb9\u6280\u672f\uff0c\u53ef\u4ee5\u63d0\u53d6\u8bbe\u5907\u76f8\u5173\u7684\u7279\u5f81\uff0c\u5e76\u8bc4\u4f30\u9891\u7387\u8bef\u5dee\u3001\u540c\u6b65\u76f8\u5173\u6027\u3001I\/Q\u539f\u70b9\u504f\u79fb\u3001\u5e45\u5ea6\u8bef\u5dee\u548c\u76f8\u4f4d\u8bef\u5dee\u7b49\u53c2\u6570\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9LoRa\u4fe1\u53f7\u7684\u7cbe\u786e\u8bc6\u522b\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000LoRa\u4fe1\u53f7\u68c0\u6d4b\u548c\u8ddf\u8e2a\u65b9\u6cd5\u6db5\u76d6\u4e86\u4ece\u786c\u4ef6\u5230\u8f6f\u4ef6\u7684\u591a\u79cd\u6280\u672f\u624b\u6bb5\uff0c\u5305\u62ecCAD\u3001RSSI\u3001\u673a\u5668\u5b66\u4e60\u3001\u76f8\u4f4d\u5bf9\u9f50\u3001\u591a\u7b26\u53f7\u901f\u7387\u68c0\u6d4b\u4ee5\u53ca\u7269\u7406\u6307\u7eb9\u8bc6\u522b\u7b49\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6848\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 LoRa\u4fe1\u53f7\u68c0\u6d4b\u4e2dCAD\u6280\u672f\u7684\u6700\u65b0\u8fdb\u5c55<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u4fe1\u53f7\u68c0\u6d4b\u4e2dCAD(Channel Activity Detection)\u6280\u672f\u7684\u6700\u65b0\u8fdb\u5c55\u4e3b\u8981\u96c6\u4e2d\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001.&nbsp;<strong>CAD\u673a\u5236\u7684\u4f18\u5316\u4e0e\u6539\u8fdb<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000<strong>FT-CSMA\u534f\u8bae<\/strong>\uff1aFT-CSMA\u662f\u4e00\u79cd\u73b0\u4ee3\u5316\u7684\u4fe1\u9053\u6d3b\u52a8\u68c0\u6d4b\u534f\u8bae\uff0c\u65e8\u5728\u4f18\u5316LoRa\u6280\u672f\u5728\u7269\u8054\u7f51(IoT)\u751f\u6001\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528\u3002\u8be5\u534f\u8bae\u5f3a\u8c03\u9009\u62e9\u5408\u9002\u7684CAD\u7f16\u53f7\u3001\u786e\u5b9a\u9002\u5f53\u7684CAD\u6301\u7eed\u65f6\u95f4\u4ee5\u53ca\u5f15\u5165\u56de\u9000\u5ef6\u8fdf\u7684\u91cd\u8981\u6027\u3002\u901a\u8fc7NS3\u4eff\u771f\u5668\u9a8c\u8bc1\uff0cFT-CSMA\u5728Packet Delivery Ratio(PDR)\u4e0a\u63d0\u9ad8\u4e86\u7ea65%\uff0c\u80fd\u91cf\u6548\u7387\u63d0\u5347\u4e86\u9ad8\u8fbe2%\uff0c\u540c\u65f6\u4e0d\u663e\u8457\u964d\u4f4e\u5ef6\u8fdf\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>LoRadar\u6280\u672f<\/strong>\uff1aYu\u7b49\u4eba\u63d0\u51fa\u4e86\u4e00\u79cd\u65b0\u7684CAD\u64cd\u4f5c\u7814\u7a76\uff0c\u6307\u51faCAD\u53ef\u80fd\u4f1a\u4ea7\u751f\u8bef\u62a5\uff0c\u7279\u522b\u662f\u5728\u7a84\u5e26\u5185\u68c0\u6d4b\u5230\u4e0d\u540cSF\u548cBW\u7684\u4fe1\u53f7\u65f6\u3002\u4ed6\u4eec\u63d0\u51fa\u4e86LoRadar\uff0c\u4e00\u79cd\u8de8\u4fe1\u9053\u626b\u63cf\u65b9\u6cd5\uff0c\u901a\u8fc7\u591a\u6b21\u8fde\u7eedCAD\u7684\u7ed3\u679c\u5206\u5e03\u6765\u533a\u5206\u6709\u6548\u4fe1\u9053\uff0c\u5e76\u5c06CAD\u672c\u8eab\u7684\u65f6\u95f4\u7f29\u77ed\u5230\u4e00\u4e2a\u7b26\u53f7\uff0c\u5e76\u5728\u4e4b\u524d\u8fdb\u884cRSSI\u6d4b\u91cf\u4ee5\u63d0\u9ad8\u53ef\u4fe1\u5ea6\u3002\u8fd9\u79cd\u65b9\u6cd5\u5b9e\u73b0\u4e86\u4e0e\u4f20\u7edfCAD\u673a\u5236\u76f8\u6bd4\u68c0\u6d4b\u65f6\u95f4\u51cf\u5c1190%\u7684\u51c6\u786e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002.&nbsp;<strong>CAD\u5728\u4e0d\u540c\u73af\u5883\u4e0b\u7684\u8868\u73b0<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000<strong>CAD\u5728\u5ba4\u5185\u548c\u5ba4\u5916\u73af\u5883\u4e2d\u7684\u6548\u7387<\/strong>\uff1a\u7814\u7a76\u8868\u660e\uff0cCAD\u5728\u5ba4\u5185\u548c\u5ba4\u5916\u73af\u5883\u4e0b\u7684\u5e73\u5747\u6548\u7387\u5206\u522b\u4e3a98%\u548c94%\uff0cSNR\u8303\u56f4\u5728-15 dB\u81f3+15 dB\u4e4b\u95f4\u3002\u6b64\u5916\uff0cCAD\u5728\u7a7a\u95f2\u548c\u4f20\u8f93\u72b6\u6001\u4e0b\u7684\u7535\u6d41\u6d88\u8017\u5206\u522b\u4e3a0.03 W\u548c0.029 mJ\uff0c\u8868\u660e\u5176\u5bf9\u80fd\u91cf\u7684\u6d88\u8017\u76f8\u5bf9\u8f83\u4f4e\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>CAD\u5728\u975e\u89c6\u8ddd\uff08NLOS\uff09\u6761\u4ef6\u4e0b\u7684\u8868\u73b0<\/strong>\uff1a\u5b9e\u9a8c\u7ed3\u679c\u663e\u793a\uff0c\u5728\u8d85\u8fc7400\u7c73\u7684\u8ddd\u79bb\u65f6\uff0cCAD\u5728\u975e\u89c6\u8ddd\u6761\u4ef6\u4e0b\u7684\u53ef\u9760\u6027\u4f1a\u4e0b\u964d\uff0c\u5c24\u5176\u662f\u5728\u8d85\u8fc71290\u7c73\u65f6\uff0cCAD\u65e0\u6cd5\u53ef\u9760\u5730\u68c0\u6d4b\u6574\u4e2a\u4f20\u8f93\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003.&nbsp;<strong>CAD\u673a\u5236\u7684\u7269\u7406\u5c42\u7279\u6027\u9002\u5e94\u6027<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000CAD\u673a\u5236\u80fd\u591f\u9002\u5e94LoRa\u8c03\u5236\u7684\u72ec\u7279\u7269\u7406\u5c42\u7279\u6027\uff0c\u4f7f\u5176\u5728LoRaWAN\u7f51\u7edc\u4e2d\u5177\u5907\u7f3a\u5931\u7684\u8f7d\u6ce2\u611f\u77e5\u80fd\u529b\u3002CAD\u5177\u6709SF\u9009\u62e9\u6027\uff0c\u4ec5\u68c0\u6d4b\u6307\u5b9aSF\u5185\u7684\u4f20\u8f93\uff0c\u5bf9\u4e0d\u540cSF\u5185\u7684\u5176\u4ed6\u4f20\u8f93\u4e0d\u654f\u611f\u3002<\/p>\n\n\n\n<p>\u3000\u3000SX1276\/77\/78\/79\u6a21\u5757\u5728CAD\u6a21\u5f0f\u4e0b\u5feb\u901f\u626b\u63cf\u9891\u6bb5\u4ee5\u68c0\u6d4bLoRa\u6570\u636e\u5305\u7684\u524d\u5bfc\u7801\uff0c\u901a\u8fc7PLL\u9501\u5b9a\u3001\u63a5\u6536LoRa\u524d\u5bfc\u7801\u7b26\u53f7\u5e76\u6d88\u8017\u6307\u5b9aRx\u6a21\u5f0f\u7535\u6d41\uff0c\u7136\u540e\u5173\u95ed\u65e0\u7ebf\u7535\u548cPLL\u5f00\u59cb\u6570\u5b57\u5904\u7406\u3002\u8be5\u8fc7\u7a0b\u8017\u65f6\u7565\u5c11\u4e8e\u4e00\u4e2a\u7b26\u53f7\u5468\u671f\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u65e0\u7ebf\u7535\u7535\u6d41\u6d88\u8017\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30004.&nbsp;<strong>CAD\u673a\u5236\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6311\u6218<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5728\u57ce\u5e02\u73af\u5883\u4e2d\uff0cCAD\u5931\u8d25\u7387\u63a5\u8fd170%\uff0c\u8fd9\u4e25\u91cd\u5f71\u54cd\u4e86CSMA\u7684\u6027\u80fd\u548c\u5b9e\u7528\u6027\u3002\u7531\u4e8eCAD\u5931\u8d25\u7387\u9ad8\uff0c\u7f51\u5173\u65e0\u6cd5\u6709\u6548\u901a\u77e5\u6240\u6709IoT\u8bbe\u5907\u6b63\u5728\u8fdb\u884c\u7684\u4f20\u8f93\uff0c\u524a\u5f31\u4e86CSMA\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u65b0\u4e00\u4ee3LoRa\u6a21\u5757\u4e0d\u4ec5\u5728\u524d\u7f00\u90e8\u5206\uff0c\u4e5f\u5728\u6709\u6548\u8f7d\u8377\u90e8\u5206\u652f\u6301CAD\u673a\u5236\uff0c\u8fd9\u4e3a\u653b\u51fb\u8005\u63d0\u4f9b\u4e86\u5728LoRaWAN\u6570\u636e\u5305\u53d1\u9001\u8fc7\u7a0b\u4e2d\u5b9e\u65bd\u53cd\u5e94\u5f0f\u5e72\u6270\u5668\u653b\u51fb\u7684\u53ef\u80fd\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u4fe1\u53f7\u68c0\u6d4b\u4e2dCAD\u6280\u672f\u7684\u6700\u65b0\u8fdb\u5c55\u5305\u62ecFT-CSMA\u534f\u8bae\u7684\u5f15\u5165\u3001LoRadar\u6280\u672f\u7684\u5e94\u7528\u3001CAD\u5728\u4e0d\u540c\u73af\u5883\u4e0b\u7684\u8868\u73b0\u4f18\u5316\u4ee5\u53ca\u5bf9\u7269\u7406\u5c42\u7279\u6027\u7684\u9002\u5e94\u6027\u6539\u8fdb\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001 \u57fa\u4e8eRSSI\u7684LoRa\u4fe1\u53f7\u68c0\u6d4b\u7684\u51c6\u786e\u6027\u548c\u9c81\u68d2\u6027\u5982\u4f55\u63d0\u9ad8?<\/h2>\n\n\n\n<p>\u3000\u3000\u5728\u590d\u6742\u7535\u78c1\u73af\u5883\u4e2d\uff0c\u63d0\u9ad8\u57fa\u4e8eRSSI\u7684LoRa\u4fe1\u53f7\u68c0\u6d4b\u7684\u51c6\u786e\u6027\u548c\u9c81\u68d2\u6027\u9700\u8981\u7efc\u5408\u8003\u8651\u591a\u4e2a\u56e0\u7d20\u548c\u91c7\u53d6\u591a\u79cd\u6280\u672f\u624b\u6bb5\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u7684\u5efa\u8bae\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001.&nbsp;<strong>\u6821\u51c6\u548c\u6a21\u578b\u4f18\u5316<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u6821\u51c6LoRa\u8bbe\u5907\u662f\u63d0\u9ad8RSSI\u6d4b\u91cf\u51c6\u786e\u6027\u7684\u5173\u952e\u6b65\u9aa4\u3002\u7531\u4e8eLoRa\u8bbe\u5907\u63d0\u4f9b\u7684RSSI\u6570\u636e\u5b58\u5728\u9ad8\u8bef\u5dee\uff0c\u6709\u65f6\u8bef\u5dee\u53ef\u8fbe20dB\uff0c\u8fd9\u5f71\u54cd\u4e86\u8def\u5f84\u635f\u8017\u4f30\u8ba1\u7684\u51c6\u786e\u6027\u3002\u901a\u8fc7\u6821\u51c6\uff0c\u53ef\u4ee5\u51cf\u5c11\u8fd9\u4e9b\u8bef\u5dee\uff0c\u63d0\u9ad8RSSI\u6d4b\u91cf\u7684\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u4f7f\u7528\u4f18\u5316\u6a21\u578b\u6765\u63d0\u9ad8\u4fe1\u53f7\u5f3a\u5ea6(RSSI)\u7684\u4f30\u8ba1\u7cbe\u5ea6\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u4f18\u5316\u6a21\u578b\u8bbe\u5b9aFSPL\u53c2\u6570\uff0c\u5e76\u7ed3\u5408\u7ebf\u6027\u56de\u5f52\u548c\u591a\u9879\u5f0f\u56de\u5f52\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u6a21\u578b\u6027\u80fd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002.&nbsp;<strong>\u591a\u659c\u7387\u6a21\u578b\u548c\u73af\u5883\u53c2\u6570<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5728\u4e0d\u540c\u73af\u5883\u4e2d\uff0c\u4f7f\u7528\u591a\u659c\u7387\u6a21\u578b\u6bd4\u5355\u659c\u7387\u6a21\u578b\u66f4\u6709\u6548\uff0c\u56e0\u4e3aLoRa\u7cfb\u7edf\u7684\u8986\u76d6\u8303\u56f4\u5e7f\u6cdb\uff0c\u4fdd\u6301\u6240\u6709\u4f4d\u7f6e\u7684\u5bf9\u6570\u8ddd\u79bb\u53c2\u6570\u4e0d\u53d8\u662f\u4e0d\u73b0\u5b9e\u7684\u3002\u591a\u659c\u7387\u6a21\u578b\u6709\u52a9\u4e8e\u6355\u6349\u540c\u4e00\u533a\u57df\u5185\u4e0d\u540c\u4f4d\u7f6e\u4fe1\u53f7\u4f20\u64ad\u7684\u7ec6\u5fae\u53d8\u5316\uff0c\u51cf\u5c11\u9884\u6d4b\u8bef\u5dee\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5305\u542b\u7279\u5b9a\u4e8e\u73af\u5883\u53c2\u6570\u7684\u6a21\u578b\u80fd\u66f4\u597d\u5730\u4e0e\u89c2\u6d4b\u6570\u636e\u5bf9\u9f50\uff0c\u7279\u522b\u662f\u5728\u690d\u88ab\u73af\u5883\u4e2d\u3002\u7ecf\u9a8c\u6a21\u578b\u5e94\u5305\u542b\u73af\u5883\u53c2\u6570\uff0c\u4ee5\u786e\u4fdd\u8de8\u4e0d\u540c\u533a\u57df\u7684\u9002\u7528\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003.&nbsp;<strong>\u673a\u5668\u5b66\u4e60\u6280\u672f<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5229\u7528\u673a\u5668\u5b66\u4e60\u6280\u672f\u8bc4\u4f30\u6a21\u578b\u53c2\u6570\u4e0e\u73af\u5883\u56e0\u7d20\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u53ef\u4ee5\u5b66\u4e60\u975e\u7ebf\u6027\u5173\u7cfb\uff0c\u4ece\u800c\u63d0\u9ad8\u6a21\u578b\u7684\u9884\u6d4b\u51c6\u786e\u6027\u3002\u4f8b\u5982\uff0c\u91c7\u7528\u591a\u5c42\u611f\u77e5\u5668(MLP)\u67b6\u6784\u548c\u8d85\u53c2\u6570\u8c03\u6574\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8f7b\u91cf\u3001\u5feb\u901f\u4e14\u51c6\u786e\u7684\u6a21\u578b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30004.&nbsp;<strong>\u5361\u5c14\u66fc\u6ee4\u6ce2\u5668<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5728\u975e\u89c6\u8ddd(NLOS)\u73af\u5883\u4e2d\uff0c\u969c\u788d\u7269\u4f1a\u4ea7\u751f\u975e\u5e38\u5e72\u6270\u6027\u7684\u4fe1\u53f7\u3002\u91c7\u7528\u5361\u5c14\u66fc\u6ee4\u6ce2\u5668\u6765\u8fc7\u6ee4LoRa RSSI\u503c\u4e2d\u7684\u566a\u58f0\uff0c\u53ef\u4ee5\u6709\u6548\u51cf\u5c11\u566a\u58f0\u5e72\u6270\uff0c\u63d0\u9ad8\u4fe1\u53f7\u68c0\u6d4b\u7684\u51c6\u786e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30005.&nbsp;<strong>\u6539\u8fdb\u5b9a\u4f4d\u7b97\u6cd5<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u4f7f\u7528\u57fa\u4e8e\u671f\u671b\u4fe1\u53f7\u529f\u7387(ESP)\u7684\u4e09\u8fb9\u5b9a\u4f4d\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6355\u6349\u4fe1\u53f7\u80fd\u91cf\uff0c\u4ece\u800c\u63d0\u9ad8\u5b9a\u4f4d\u7cbe\u5ea6\u3002ESP\u65b9\u6cd5\u6bd4\u4f20\u7edf\u7684RSSI\u65b9\u6cd5\u66f4\u80fd\u51c6\u786e\u53cd\u6620\u4fe1\u53f7\u7684\u5b9e\u9645\u5f3a\u5ea6\uff0c\u5c24\u5176\u662f\u5728\u9634\u5f71\u6548\u5e94\u548c\u591a\u5f84\u6548\u5e94\u663e\u8457\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30006.&nbsp;<strong>\u8c03\u6574\u7cfb\u7edf\u53c2\u6570<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u589e\u52a0\u6269\u5c55\u56e0\u5b50(SF)\u53ef\u4ee5\u964d\u4f4e\u5e73\u5747RSSI\u503c\uff0c\u63d0\u9ad8\u4fe1\u53f7\u7a33\u5b9a\u6027\u548c\u5f3a\u5ea6\u3002\u540c\u65f6\uff0c\u8c03\u6574\u5e26\u5bbd\u548c\u7f16\u7801\u7387\u4e5f\u80fd\u5f71\u54cdRSSI\u548c\u4fe1\u566a\u6bd4(SNR)\uff0c\u4ece\u800c\u4f18\u5316\u4fe1\u53f7\u4f20\u8f93\u8d28\u91cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30007.&nbsp;<strong>\u5b9e\u9a8c\u9a8c\u8bc1\u548c\u6570\u636e\u6536\u96c6<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u8fdb\u884c\u8be6\u7ec6\u7684\u5b9e\u9a8c\u9a8c\u8bc1\uff0c\u5982\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u8bb0\u5f55RSSI\u4fe1\u53f7\u503c\uff0c\u5e76\u5206\u6790\u5176\u53d8\u5316\u89c4\u5f8b\u3002\u901a\u8fc7\u6536\u96c6\u5927\u91cf\u6570\u636e\u5e76\u8fdb\u884c\u5206\u6790\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u4fe1\u53f7\u4f20\u64ad\u7279\u6027\uff0c\u5e76\u636e\u6b64\u4f18\u5316\u6a21\u578b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 \u76f8\u4f4d\u5bf9\u9f50\u548c\u9891\u7387\u5305\u7edc\u8ddf\u8e2a\u5728LoRa\u4fe1\u53f7\u68c0\u6d4b\u4e2d\u7684\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u3000\u3000\u5728LoRa\u4fe1\u53f7\u68c0\u6d4b\u4e2d\uff0c\u76f8\u4f4d\u5bf9\u9f50\u548c\u9891\u7387\u5305\u7edc\u8ddf\u8e2a\u662f\u4e24\u4e2a\u5173\u952e\u6b65\u9aa4\uff0c\u7528\u4e8e\u63d0\u9ad8\u4fe1\u53f7\u7684\u89e3\u8c03\u7cbe\u5ea6\u548c\u51cf\u5c11\u8bef\u62a5\u3002\u4ee5\u4e0b\u662f\u5177\u4f53\u7684\u5b9e\u73b0\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u76f8\u4f4d\u5bf9\u9f50<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u4e24\u6b65\u76f8\u4f4d\u5bf9\u51c6\u7b97\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u7b2c\u4e00\u6b65<\/strong>\uff1a\u63a5\u6536\u5668\u68c0\u67e5\u6bcf\u4e2aLoRa\u7b26\u53f7\u5728\u63a5\u6536\u4fe1\u53f7\u4e2d\u7684\u8fb9\u754c\uff0c\u5c06\u5269\u4f59\u4fe1\u53f7\u6837\u672c\u7684\u76f8\u4f4d\u8fdb\u884c\u9002\u5f53\u8c03\u6574\uff0c\u4f7f\u5176\u4e0e\u524d\u4e00\u4e2aLoRa\u7b26\u53f7\u7684\u76f8\u4f4d\u6837\u672c\u76f8\u5339\u914d\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u7b2c\u4e8c\u6b65<\/strong>\uff1a\u901a\u8fc7\u91cd\u5efa\u8f7d\u6ce2\u7b26\u53f7\u6765\u5b9a\u4f4d\u7531\u9891\u7387\u5305\u7edc\u5f15\u8d77\u7684\u76f8\u4f4d\u8df3\u8dc3\u3002\u6700\u540e\uff0c\u6d88\u9664\u7531\u9891\u7387\u5305\u7edc\u5f15\u8d77\u7684\u76f8\u4f4d\u8df3\u8dc3\uff0c\u4ec5\u4fdd\u7559\u7531\u80cc\u6563\u5c04\u4fe1\u53f7\u5f15\u8d77\u7684\u771f\u9633\u6027\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u57fa\u4e8e\u8d85\u91c7\u6837\u7684\u76f8\u4f4d\u5bf9\u9f50\u65b9\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u4f7f\u7528\u4f4e\u901a\u6ee4\u6ce2\u5668\u548c\u8d85\u91c7\u6837\u6280\u672f\uff0c\u5c06LoRa\u7b26\u53f7\u4e2d\u7684\u4e24\u4e2a\u8c03\u9891\u6bb5\u5206\u79bb\u5e76\u91cd\u65b0\u7ec4\u5408\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u7a33\u5b9a\u7684\u53bb\u8c03\u9891\u6548\u679c\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5f53\u8c03\u9891\u7a97\u53e3\u4e0e\u4fe1\u53f7\u5b8c\u7f8e\u5bf9\u9f50\u65f6\uff0c\u4e0a\u8c03\u9891\u548c\u4e0b\u8c03\u9891\u7684\u5cf0\u503c\u5c06\u5728\u76f8\u540c\u9891\u7387\u4e0b\u51fa\u73b0\uff0c\u65e0\u8bba\u8f7d\u6ce2\u9891\u7387\u504f\u79fb(CFO)\u5982\u4f55\uff0c\u8fd9\u4e3a\u5b9e\u73b0\u51c6\u786e\u7684\u5bf9\u9f50\u63d0\u4f9b\u4e86\u57fa\u7840\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u76f8\u4f4d\u6821\u6b63<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u8c03\u8bd5\u8fc7\u7a0b\u4e2d\u53d1\u73b0LoRa\u89e3\u8c03\u5b58\u57281\u62162\u4f4d\u9519\u8bef\uff0c\u53ef\u80fd\u662f\u7531\u4e8eUSRP\u672c\u5730\u632f\u8361\u5668(LO)\u7684\u91c7\u6837\u9891\u7387\u504f\u79fb\u5bfc\u81f4\u7684\u3002\u4e3a\u4e86\u51cf\u5c11\u8fd9\u79cd\u9519\u8bef\u7684\u5f71\u54cd\uff0c\u6211\u4eec\u51b3\u5b9a\u5bf9\u76f8\u4f4d\u8fdb\u884c\u6821\u6b63\uff0c\u56e0\u4e3a\u4e24\u4e2a\u5177\u6709\u76f8\u540c\u521d\u59cb\u9891\u7387\u7684LoRa\u7b26\u53f7\u5fc5\u987b\u5728\u6bcf\u4e2a\u6837\u672c\u4e2d\u5177\u6709\u76f8\u540c\u7684\u76f8\u4f4d\u3002\u6211\u4eec\u901a\u8fc7\u8ba1\u7b97\u76f8\u4f4d\u5dee\u6765\u6821\u6b63\u76f8\u4f4d\uff0c\u5e76\u5bf9\u6240\u6709\u524d\u5bfc\u7b26\u53f7\u53d6\u5e73\u5747\u503c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u9891\u7387\u5305\u7edc\u8ddf\u8e2a<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u7a97\u53e3\u5bf9\u9f50\u6280\u672f<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u7ed3\u5408SFD(\u5e8f\u5217\u524d\u5bfc\u7801)\u4e2d\u7684\u4e0b\u8c03\u9891\u548c\u524d\u5bfc\u7801\u4e2d\u7684\u4e0a\u8c03\u9891\uff0c\u5b9e\u73b0\u7cbe\u786e\u7684\u5bf9\u9f50\u3002\u5f53\u8c03\u9891\u7a97\u53e3\u4e0e\u4fe1\u53f7\u5b8c\u7f8e\u5bf9\u9f50\u65f6\uff0c\u4e0a\u8c03\u9891\u548c\u4e0b\u8c03\u9891\u7684\u5cf0\u503c\u5c06\u5728\u76f8\u540c\u9891\u7387\u4e0b\u51fa\u73b0\uff0c\u65e0\u8bba\u8f7d\u6ce2\u9891\u7387\u504f\u79fb(CFO)\u5982\u4f55\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u9891\u8c31\u5408\u5e76\u65b9\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u4e3a\u4e86\u89e3\u51b3LoRa\u8f7d\u8377\u8c03\u5236\u7684\u5468\u671f\u6027\u9891\u7387\u504f\u79fb\u95ee\u9898\uff0c\u63d0\u51fa\u4e86\u4e00\u79cd\u9891\u8c31\u5408\u5e76\u65b9\u6cd5\u3002\u5bf9\u4e8e\u91c7\u6837\u7387\u9ad8\u4e8eLoRa\u5e26\u5bbd\u4e24\u500d\u7684\u60c5\u51b5\uff0c\u901a\u8fc7\u7ffb\u8f6c\u9891\u8c31\u5e76\u53e0\u52a0\u4ee5\u805a\u96c6\u4e24\u4e2aFFT\u5cf0\u503c\u7684\u80fd\u91cf\u3002\u5bf9\u4e8e\u91c7\u6837\u7387\u4f4e\u4e8eLoRa\u5e26\u5bbd\u7684\u60c5\u51b5\uff0c\u63d0\u51fa\u4e86\u4e00\u79cd\u91c7\u6837\u63a7\u5236\u7b56\u7565\uff0c\u901a\u8fc7\u8bbe\u7f6e\u91c7\u6837\u7387\u4e3a\u0394f\u7684\u6574\u6570\u90e8\u5206\uff0c\u4f7f50\u0394f\u548c50\u0394f-\u0394f\u7684\u5cf0\u503c\u5728\u9891\u8c31\u4e2d\u51fa\u73b0\u76f8\u540c\u4f4d\u7f6e\uff0c\u7136\u540e\u7ffb\u8f6c\u9891\u8c31\u5e76\u8865\u507f\u5cf0\u503c\u76f8\u4f4d\uff0c\u4ee5\u6709\u6548\u96c6\u4e2d\u8f7d\u8377\u4fe1\u53f7\u7684\u80fd\u91cf\u3002<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u57fa\u4e8e\u9884\u4f30\u7684\u8c03\u6574\u65b9\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u5728\u63a5\u6536\u673a\u4fa7\uff0c\u901a\u8fc7\u68c0\u6d4b\u76f8\u5173\u7ed3\u679c\u5cf0\u503c\u6765\u5bf9\u9f50\u89e3\u8c03\u7a97\u53e3\u4e0e\u4f20\u5165LoRa\u6570\u636e\u5305\u5f00\u59cb\u7684\u65b9\u6cd5\u3002\u5177\u4f53\u800c\u8a00\uff0c\u901a\u8fc7\u63a7\u5236\u6570\u636e\u5305\u7684\u524d\u7f00\u957f\u5ea6\uff0c\u751f\u6210\u4e00\u5bf9\u540c\u7c7b\u578b\u548c\u4e0d\u540c\u7c7b\u578b\u7684\u4fe1\u9053\u6ce2\u5f62\u7684\u53e0\u52a0\uff0c\u4ece\u800c\u4ea7\u751f\u4e00\u4e2a\u9891\u7387\u968f\u65f6\u95f4\u53d8\u5316\u7684\u5305\u7edc\u4fe1\u53f7\u3002\u901a\u8fc7\u4e0e\u8fd9\u79cd\u9891\u7387\u53d8\u5316\u7684\u5305\u7edc\u4fe1\u53f7\u8fdb\u884c\u4ea4\u53c9\u76f8\u5173\uff0c\u53ef\u4ee5\u5c06\u5c0f\u7684\u65f6\u95f4\u504f\u79fb\u8f6c\u6362\u4e3a\u663e\u8457\u7684\u76f8\u5173\u7cfb\u6570\u53d8\u5316\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 \u7269\u7406\u6307\u7eb9\u6280\u672f\u5728LoRa\u4fe1\u53f7\u8bc6\u522b\u4e2d\u7684\u5e94\u7528<\/h2>\n\n\n\n<p>\u3000\u3000\u7269\u7406\u6307\u7eb9\u6280\u672f\u5728LoRa\u4fe1\u53f7\u8bc6\u522b\u4e2d\u7684\u5e94\u7528\u6848\u4f8b\u4e3b\u8981\u96c6\u4e2d\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. <strong>\u57fa\u4e8e\u76d1\u7763\u548c\u96f6\u6837\u672c\u5b66\u4e60\u7684LoRa\u8bbe\u5907\u6307\u7eb9\u8bc6\u522b<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000Pieter Robyns\u7b49\u4eba\u63d0\u51fa\u4e86\u4e00\u79cd\u65b0\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u76d1\u7763\u673a\u5668\u5b66\u4e60\u548c\u96f6\u6837\u672c\u56fe\u50cf\u5206\u7c7b\u6280\u672f\u6765\u5bf9LoRa\u8bbe\u5907\u8fdb\u884c\u7269\u7406\u5c42\u6307\u7eb9\u8bc6\u522b\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4f9d\u8d56\u4e8e\u5c40\u90e8\u5316\u548c\u4f4e\u7ef4\u7279\u5f81\uff0c\u800c\u662f\u4f7f\u7528\u6574\u4e2a\u4fe1\u53f7\u8fdb\u884c\u5206\u6790\u3002\u5b9e\u9a8c\u8868\u660e\uff0c\u76f8\u540c\u82af\u7247\u7ec4\u7684\u8bbe\u5907\u53ef\u4ee5\u4ee559%\u523099%\u7684\u51c6\u786e\u7387\u8fdb\u884c\u533a\u5206\uff0c\u800c\u4e0d\u540c\u4f9b\u5e94\u5546\u7684\u82af\u7247\u7ec4\u5219\u53ef\u4ee5\u4ee599%\u5230100%\u7684\u51c6\u786e\u7387\u8fdb\u884c\u6307\u7eb9\u8bc6\u522b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. <strong>\u5dee\u5206\u661f\u5ea7\u8f68\u8ff9\u56fe\u7684LoRa\u8bbe\u5907\u8bc6\u522b<\/strong>\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000Yu Jiang\u548cLinning 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