{"id":99316,"date":"2024-11-18T09:40:42","date_gmt":"2024-11-18T01:40:42","guid":{"rendered":"\/\/www.viralrail.com\/?p=99316"},"modified":"2024-11-18T09:40:46","modified_gmt":"2024-11-18T01:40:46","slug":"zdtzfsjs","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/99316.html","title":{"rendered":"Zigbee\u7684\u8c03\u5236\u65b9\u5f0f\u4ecb\u7ecd"},"content":{"rendered":"\n

\u3000\u3000Zigbee<\/strong>\u662f\u4e00\u79cd\u57fa\u4e8eIEEE 802.15.4\u6807\u51c6\u7684\u65e0\u7ebf\u901a\u4fe1\u6280\u672f\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f4e\u529f\u8017\u3001\u77ed\u8ddd\u79bb\u7684\u65e0\u7ebf\u901a\u4fe1\u573a\u666f\u3002\u5176\u7269\u7406\u5c42(PHY)\u91c7\u7528\u4e86\u591a\u79cd\u8c03\u5236\u65b9\u5f0f\uff0c\u4ee5\u9002\u5e94\u4e0d\u540c\u7684\u5de5\u4f5c\u9891\u7387\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n\n\n\n

\u3000\u30002.4 GHz\u9891\u6bb5<\/strong>\uff1a\u57282.4 GHz\u9891\u6bb5\u4e0a\uff0cZigbee\u4f7f\u7528\u504f\u79fb\u56db\u76f8\u4f4d\u79fb\u952e\u63a7(O-QPSK)\u8c03\u5236\u65b9\u5f0f\u3002\u8fd9\u79cd\u8c03\u5236\u65b9\u5f0f\u901a\u8fc7\u5c06\u4e8c\u8fdb\u5236\u6570\u636e\u8f6c\u6362\u4e3a\u7b26\u53f7\u6570\u636e\uff0c\u5e76\u5c06\u8fd9\u4e9b\u7b26\u53f7\u6570\u636e\u6620\u5c04\u5230\u4f2a\u968f\u673a\u5e8f\u5217(PN\u5e8f\u5217)\uff0c\u7136\u540e\u4f7f\u7528O-QPSK\u65b9\u6cd5\u8c03\u5236\u5230\u8f7d\u6ce2\u4e0a\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u3002\u6b64\u5916\uff0c2.4 GHz\u9891\u6bb5\u8fd8\u91c7\u7528\u76f4\u63a5\u5e8f\u5217\u6269\u9891(DSSS)\u6280\u672f\uff0c\u4ee5\u63d0\u9ad8\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u80fd\u529b\u548c\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000868 MHz\u548c915 MHz\u9891\u6bb5<\/strong>\uff1a\u5728868 MHz\u548c915 MHz\u9891\u6bb5\u4e0a\uff0cZigbee\u4e3b\u8981\u4f7f\u7528\u4e8c\u8fdb\u5236\u76f8\u79fb\u952e\u63a7(BPSK)\u8c03\u5236\u65b9\u5f0f\u3002\u8fd9\u79cd\u8c03\u5236\u65b9\u5f0f\u9002\u7528\u4e8e\u8fd9\u4e9b\u4f4e\u9891\u9891\u6bb5\uff0c\u56e0\u4e3a\u5b83\u4eec\u5177\u6709\u8f83\u957f\u7684\u4f20\u8f93\u8ddd\u79bb\u548c\u8f83\u4f4e\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u9700\u6c42\u3002<\/p>\n\n\n\n

\u3000\u3000\u5176\u4ed6\u8c03\u5236\u65b9\u5f0f<\/strong>\uff1a\u9664\u4e86\u4e0a\u8ff0\u4e3b\u8981\u7684\u8c03\u5236\u65b9\u5f0f\u5916\uff0cZigbee\u8fd8\u652f\u6301\u5dee\u5206\u4e8c\u8fdb\u5236\u76f8\u4f4d\u952e\u63a7(DBPSK)\u8c03\u5236\u65b9\u5f0f\uff0c\u8fd9\u6709\u52a9\u4e8e\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000Zigbee\u901a\u8fc7\u7075\u6d3b\u7684\u8c03\u5236\u65b9\u5f0f\u9009\u62e9\uff0c\u80fd\u591f\u6ee1\u8db3\u4e0d\u540c\u9891\u6bb5\u548c\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u3001\u4f4e\u529f\u8017\u7684\u65e0\u7ebf\u901a\u4fe1\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001 Zigbee\u57282.4 GHz\u9891\u6bb5\u4f7f\u7528\u504f\u79fb\u56db\u76f8\u4f4d\u79fb\u952e\u63a7(O-QPSK)\u8c03\u5236\u65b9\u5f0f\u7684\u5177\u4f53\u5b9e\u73b0\u539f\u7406<\/h2>\n\n\n\n

\u3000\u3000Zigbee\u57282.4 GHz\u9891\u6bb5\u4f7f\u7528\u504f\u79fb\u56db\u76f8\u4f4d\u79fb\u952e\u63a7(O-QPSK)\u8c03\u5236\u65b9\u5f0f\u7684\u5177\u4f53\u5b9e\u73b0\u539f\u7406\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000O-QPSK(\u504f\u79fb\u56db\u76f8\u4f4d\u79fb\u952e\u63a7)\u662f\u4e00\u79cd\u6539\u8fdb\u7684QPSK(\u56db\u76f8\u4f4d\u79fb\u952e\u63a7)\u8c03\u5236\u65b9\u5f0f\u3002\u5b83\u901a\u8fc7\u5c06\u4fe1\u53f7\u5ef6\u8fdf\u534a\u4e2a\u5468\u671f\u6765\u907f\u514d\u53ef\u80fd\u7684\u76f8\u4f4d\u53d8\u5316\uff0c\u4ece\u800c\u51cf\u5c11\u5e72\u6270\u3002<\/p>\n\n\n\n

\u3000\u3000\u5728IEEE 802.15.4\u6807\u51c6\u4e2d\uff0c\u6bcf\u4e2a\u6570\u636e\u7b26\u53f7\u753132\u4e2a\u7801\u7247\u7ec4\u6210\uff0c\u5e76\u6620\u5c04\u5230\u4e00\u4e2a\u4f2a\u968f\u673a\u5e8f\u5217(PN\u5e8f\u5217)\u4e2d\u3002\u8fd9\u4e9b\u7801\u7247\u901a\u8fc7\u5faa\u73af\u79fb\u4f4d\u548c\/\u6216\u5171\u8f6d\u5b9e\u73b0\u5f7c\u6b64\u6b63\u4ea4\u3002\u6bcf\u4e2a\u7b26\u53f7\u4ee5\u6700\u4e0d\u663e\u8457\u7684\u5b57\u8282\u5f00\u59cb\u4f20\u8f93\uff0c\u5bf9\u4e8e\u5b89\u5168\u76f8\u5173\u5b57\u6bb5\uff0c\u5219\u4ee5\u6700\u9ad8\u663e\u8457\u7684\u5b57\u8282\u5f00\u59cb\u4f20\u8f93\u3002<\/p>\n\n\n\n

\u3000\u3000O-QPSK\u8c03\u5236\u5c06\u5947\u6570\u7d22\u5f15\u7684\u7801\u7247\u8c03\u5236\u5230\u6b63\u4ea4\u76f8\u4f4d\u8f7d\u6ce2\u4e0a\uff0c\u5076\u6570\u7d22\u5f15\u7684\u7801\u7247\u8c03\u5236\u5230\u540c\u76f8\u8f7d\u6ce2\u4e0a\uff0c\u4ece\u800c\u5f62\u6210I\u76f8\u548cQ\u76f8\u82af\u7247\u8c03\u5236\u4e4b\u95f4\u7684\u504f\u79fb\u3002\u8fd9\u79cd\u8c03\u5236\u65b9\u5f0f\u4f7f\u7528\u534a\u6b63\u5f26\u6ce2\u82af\u7247\u6574\u5f62\uff0c\u4f7f\u5f97\u6bcf\u4e2a\u82af\u7247\u4ee5\u534a\u6b63\u5f26\u6ce2\u7684\u5f62\u5f0f\u4f20\u8f93\uff0c\u5728I\u548cQ\u4fe1\u9053\u4e4b\u95f4\u4ea4\u66ff\u4f20\u8f93\uff0c\u5e76\u4e14\u5177\u6709\u534a\u4e2a\u82af\u7247\u5468\u671f\u7684\u504f\u79fb\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e3a\u4e86\u5b9e\u73b02.4 GHz\u4e0b\u768462.5 Ksymbols\/s\u7b26\u53f7\u901f\u7387\uff0c\u9700\u8981\u5c06\u82af\u7247\u901f\u7387\u8bbe\u7f6e\u4e3a32\u500d\u4e8e\u7b26\u53f7\u901f\u7387\u3002\u8fd9\u610f\u5473\u7740\u6bcf\u4e2a\u7b26\u53f7\u5305\u542b32\u4e2a\u7801\u7247\uff0c\u8fd9\u4e9b\u7801\u7247\u4ee52 MChips\/s\u7684\u901f\u7387\u4f20\u8f93\u3002<\/p>\n\n\n\n

\u3000\u3000O-QPSK\u8c03\u5236\u57282.4 GHz\u9891\u6bb5\u4e0b\u80fd\u591f\u6709\u6548\u51cf\u5c11\u76f8\u90bb\u7f51\u7edc\u4e4b\u95f4\u7684\u5e72\u6270\uff0c\u540c\u65f6\u4fdd\u6301\u8f83\u9ad8\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002\u4f8b\u5982\uff0c\u5728256 kb\/s\u7684\u6570\u636e\u901f\u7387\u4e0b\uff0cO-QPSK\u8c03\u5236\u7684\u8f93\u51fa\u8c31\u56fe\u5177\u67098 dB\u7684\u4f59\u91cf\uff0c\u7b26\u5408Zigbee\u9891\u8c31\u63a9\u6a21\u7684\u8981\u6c42\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001 Zigbee\u5728868 MHz\u548c915 MHz\u9891\u6bb5\u4f7f\u7528\u4e8c\u8fdb\u5236\u76f8\u79fb\u952e\u63a7(BPSK)\u8c03\u5236\u65b9\u5f0f\u7684\u4f18\u52bf\u548c\u5c40\u9650\u6027<\/h2>\n\n\n\n

\u3000\u3000Zigbee\u5728868 MHz\u548c915 MHz\u9891\u6bb5\u4f7f\u7528\u4e8c\u8fdb\u5236\u76f8\u79fb\u952e\u63a7(BPSK)\u8c03\u5236\u65b9\u5f0f\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\u548c\u5c40\u9650\u6027\uff1a<\/p>\n\n\n\n

\u3000\u30001. \u4f18\u52bf\uff1a<\/h3>\n\n\n\n
    \n
  • \u3000\u3000\u4f4e\u529f\u8017<\/strong>\uff1aBPSK\u8c03\u5236\u65b9\u5f0f\u5728\u4f4e\u9891\u6bb5(\u5982868 MHz\u548c915 MHz)\u4e0b\u80fd\u591f\u5b9e\u73b0\u8f83\u4f4e\u7684\u6570\u636e\u901f\u7387\uff0c\u8fd9\u6709\u52a9\u4e8e\u964d\u4f4e\u529f\u8017\u3002\u4f8b\u5982\uff0c\u5728868 MHz\u9891\u6bb5\u4e0b\uff0c\u6570\u636e\u901f\u7387\u4e3a20 kbps\uff0c\u800c\u5728915 MHz\u9891\u6bb5\u4e0b\u4e3a40 kbps\u3002\u8fd9\u79cd\u4f4e\u6570\u636e\u901f\u7387\u4f7f\u5f97\u8bbe\u5907\u80fd\u591f\u5728\u4f4e\u529f\u8017\u6a21\u5f0f\u4e0b\u8fd0\u884c\uff0c\u5ef6\u957f\u7535\u6c60\u5bff\u547d\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u7b80\u5355\u5b9e\u73b0<\/strong>\uff1aBPSK\u8c03\u5236\u76f8\u5bf9\u7b80\u5355\uff0c\u6613\u4e8e\u5b9e\u73b0\u548c\u7ef4\u62a4\u3002\u7531\u4e8e\u5176\u7b80\u5355\u7684\u8c03\u5236\u8fc7\u7a0b\uff0c\u8bbe\u5907\u7684\u786c\u4ef6\u9700\u6c42\u8f83\u4f4e\uff0c\u4ece\u800c\u964d\u4f4e\u4e86\u6210\u672c\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u5b89\u5168\u6027<\/strong>\uff1aZigbee\u7f51\u7edc\u91c7\u7528\u9ad8\u7ea7\u52a0\u5bc6\u6807\u51c6(AES)\u8fdb\u884c\u6570\u636e\u52a0\u5bc6\uff0c\u786e\u4fdd\u901a\u4fe1\u7684\u5b89\u5168\u6027\u3002\u867d\u7136BPSK\u672c\u8eab\u4e0d\u63d0\u4f9b\u989d\u5916\u7684\u5b89\u5168\u7279\u6027\uff0c\u4f46\u7ed3\u5408AES\u52a0\u5bc6\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u7a83\u542c\u548c\u5176\u4ed6\u5b89\u5168\u5a01\u80c1\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u9002\u7528\u6027\u5e7f\u6cdb<\/strong>\uff1aBPSK\u8c03\u5236\u65b9\u5f0f\u9002\u7528\u4e8e\u591a\u79cd\u5e94\u7528\u573a\u666f\uff0c\u5305\u62ec\u5bb6\u5ead\u81ea\u52a8\u5316\u3001\u5065\u5eb7\u76d1\u6d4b\u7b49\u9700\u8981\u4f4e\u529f\u8017\u548c\u4f4e\u6570\u636e\u901f\u7387\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n\n\n\n

    \u3000\u30002. \u5c40\u9650\u6027\uff1a<\/h3>\n\n\n\n
      \n
    • \u3000\u3000\u6570\u636e\u901f\u7387\u4f4e<\/strong>\uff1aBPSK\u8c03\u5236\u65b9\u5f0f\u7684\u6700\u5927\u6570\u636e\u901f\u7387\u4e3a20 kbps(868 MHz)\u548c40 kbps(915 MHz)\uff0c\u8fd9\u9650\u5236\u4e86\u5176\u5728\u9ad8\u6570\u636e\u4f20\u8f93\u9700\u6c42\u7684\u5e94\u7528\u4e2d\u7684\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u5728\u9700\u8981\u9ad8\u6570\u636e\u541e\u5410\u91cf\u7684\u591a\u4f20\u611f\u5668\u7f51\u7edc\u4e2d\uff0c\u8f83\u4f4e\u7684\u6570\u636e\u901f\u7387\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u7f13\u51b2\u548c\u5904\u7406\u80fd\u529b\u4e0d\u8db3\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u4f20\u8f93\u8303\u56f4\u6709\u9650<\/strong>\uff1a\u7531\u4e8eBPSK\u8c03\u5236\u65b9\u5f0f\u7684\u4f4e\u6570\u636e\u901f\u7387\u548c\u8f83\u4f4e\u7684\u8f93\u51fa\u529f\u7387\uff0cZigbee\u7684\u4f20\u8f93\u8303\u56f4\u901a\u5e38\u9650\u5236\u5728\u5ba4\u5185\u73af\u5883\u5185\uff0c\u5927\u7ea6\u4e3a10\u81f320\u7c73\u3002\u5c3d\u7ba1\u5728\u89c6\u7ebf\u65e0\u969c\u788d\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u6269\u5c55\u52301500\u7c73\uff0c\u4f46\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd9\u79cd\u8303\u56f4\u4ecd\u7136\u53d7\u5230\u9650\u5236\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u6297\u5e72\u6270\u80fd\u529b\u8f83\u5f31<\/strong>\uff1aBPSK\u8c03\u5236\u65b9\u5f0f\u5728\u6297\u5e72\u6270\u65b9\u9762\u8868\u73b0\u4e0d\u5982\u5176\u4ed6\u66f4\u590d\u6742\u7684\u8c03\u5236\u65b9\u5f0f\uff0c\u5982\u6b63\u4ea4\u56db\u5206\u91cf\u76f8\u79fb\u952e\u63a7(O-QPSK)\u3002\u8fd9\u610f\u5473\u7740\u5728\u591a\u5f84\u5e72\u6270\u6216\u566a\u58f0\u8f83\u9ad8\u7684\u73af\u5883\u4e2d\uff0cBPSK\u4fe1\u53f7\u53ef\u80fd\u4f1a\u53d7\u5230\u66f4\u591a\u5e72\u6270\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u7f51\u7edc\u62d3\u6251\u9650\u5236<\/strong>\uff1a\u867d\u7136Zigbee\u652f\u6301\u591a\u79cd\u7f51\u7edc\u62d3\u6251(\u5982\u70b9\u5bf9\u70b9\u3001\u661f\u578b\u3001\u6811\u578b\u548c\u7f51\u72b6)\uff0c\u4f46\u5728\u4f4e\u6570\u636e\u901f\u7387\u4e0b\uff0c\u8fd9\u4e9b\u62d3\u6251\u7684\u6548\u7387\u53ef\u80fd\u4e0d\u5982\u5728\u9ad8\u6570\u636e\u901f\u7387\u4e0b\u90a3\u6837\u9ad8\u6548\u3002\u56e0\u6b64\uff0c\u5728\u9700\u8981\u590d\u6742\u7f51\u7edc\u7ed3\u6784\u7684\u5e94\u7528\u4e2d\uff0cBPSK\u8c03\u5236\u65b9\u5f0f\u53ef\u80fd\u4e0d\u662f\u6700\u4f73\u9009\u62e9\u3002<\/li>\n<\/ul>\n\n\n\n

      \u3000\u3000\u4e09\u3001 Zigbee\u7684\u5dee\u5206\u4e8c\u8fdb\u5236\u76f8\u4f4d\u952e\u63a7(DBPSK)\u8c03\u5236\u65b9\u5f0f\u662f\u5982\u4f55\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u548c\u53ef\u9760\u6027\u7684?<\/h2>\n\n\n\n

      \u3000\u3000Zigbee\u7684\u5dee\u5206\u4e8c\u8fdb\u5236\u76f8\u4f4d\u952e\u63a7(DBPSK)\u8c03\u5236\u65b9\u5f0f\u901a\u8fc7\u7279\u5b9a\u7684\u6280\u672f\u624b\u6bb5\u63d0\u9ad8\u4e86\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n

      \u3000\u3000DBPSK\u8c03\u5236\u6280\u672f\u4e0d\u9700\u8981\u7cbe\u786e\u7684\u4fe1\u9053\u4f30\u8ba1\uff0c\u8fd9\u4f7f\u5f97\u5176\u5728\u65e0\u7ebf\u4fe1\u9053\u4e2d\u5177\u6709\u8f83\u5f3a\u7684\u9002\u5e94\u6027\uff0c\u5c24\u5176\u662f\u5728\u591a\u5f84\u8870\u843d\u4e25\u91cd\u7684\u73af\u5883\u4e2d\u3002\u7531\u4e8eDBPSK\u4ec5\u4f9d\u8d56\u4e8e\u76f8\u4f4d\u53d8\u5316\u6765\u8868\u793a\u4fe1\u606f\uff0c\u56e0\u6b64\u5bf9\u5e45\u5ea6\u548c\u9891\u7387\u7684\u53d8\u5316\u4e0d\u654f\u611f\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u5bf9\u590d\u6742\u4fe1\u9053\u4f30\u8ba1\u7684\u9700\u6c42\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97DBPSK\u5728\u5b9e\u73b0\u4e0a\u76f8\u5bf9\u7b80\u5355\uff0c\u786c\u4ef6\u590d\u6742\u5ea6\u8f83\u4f4e\uff0c\u964d\u4f4e\u4e86\u7cfb\u7edf\u7684\u6574\u4f53\u6210\u672c\u548c\u529f\u8017\u3002<\/p>\n\n\n\n

      \u3000\u3000DBPSK\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6052\u5b9a\u5305\u7edc\u4fe1\u53f7\uff0c\u8fd9\u610f\u5473\u7740\u4fe1\u53f7\u7684\u5e45\u5ea6\u4fdd\u6301\u4e0d\u53d8\uff0c\u8fd9\u6709\u52a9\u4e8e\u5728\u975e\u7ebf\u6027\u901a\u4fe1\u4fe1\u9053\u4e2d\u4f20\u8f93\u6570\u636e\u3002\u975e\u7ebf\u6027\u6548\u5e94\u901a\u5e38\u4f1a\u5bfc\u81f4\u4fe1\u53f7\u5e45\u5ea6\u7684\u53d8\u5316\uff0c\u4ece\u800c\u5f71\u54cd\u4fe1\u53f7\u7684\u8d28\u91cf\u3002\u56e0\u6b64\uff0c\u6052\u5b9a\u5305\u7edc\u4fe1\u53f7\u53ef\u4ee5\u51cf\u5c11\u8fd9\u4e9b\u975e\u7ebf\u6027\u6548\u5e94\u7684\u5f71\u54cd\uff0c\u63d0\u9ad8\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u3002<\/p>\n\n\n\n

      \u3000\u3000DBPSK\u8c03\u5236\u65b9\u5f0f\u901a\u8fc7\u5229\u7528\u76f8\u90bb\u7801\u5143\u4e4b\u95f4\u7684\u76f8\u5bf9\u76f8\u4f4d\u53d8\u5316\u6765\u8868\u793a\u6570\u636e\uff0c\u800c\u4e0d\u662f\u7edd\u5bf9\u76f8\u4f4d\u3002\u8fd9\u79cd\u76f8\u5bf9\u7f16\u7801\u65b9\u5f0f\u4f7f\u5f97DBPSK\u80fd\u591f\u66f4\u597d\u5730\u62b5\u6297\u76f8\u4f4d\u566a\u58f0\u548c\u9891\u7387\u504f\u79fb\u7684\u5f71\u54cd\u3002\u4f8b\u5982\uff0c\u5728\u5b58\u5728\u76f8\u4f4d\u566a\u58f0\u7684\u60c5\u51b5\u4e0b\uff0cDBPSK\u7684\u8868\u73b0\u4f18\u4e8e\u4f20\u7edf\u7684BPSK\u8c03\u5236\u65b9\u5f0f\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u5e72\u6270\u901a\u5e38\u53ea\u4f1a\u5f71\u54cd\u632f\u5e45\u800c\u4e0d\u4f1a\u6539\u53d8\u76f8\u4f4d\uff0c\u56e0\u6b64DBPSK\u5728\u6297\u5e72\u6270\u65b9\u9762\u4e5f\u8868\u73b0\u51fa\u8272\u3002<\/p>\n\n\n\n

      \u3000\u3000DBPSK\u8c03\u5236\u6280\u672f\u4e0d\u9700\u8981\u8f7d\u6ce2\u6062\u590d\u7535\u8def\uff0c\u8fd9\u8fdb\u4e00\u6b65\u7b80\u5316\u4e86\u7cfb\u7edf\u7684\u8bbe\u8ba1\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5c24\u5176\u662f\u5728\u52a8\u6001\u53d8\u5316\u7684\u73af\u5883\u4e2d\uff0c\u8f7d\u6ce2\u6062\u590d\u7535\u8def\u53ef\u80fd\u4f1a\u5f15\u5165\u989d\u5916\u7684\u590d\u6742\u6027\u548c\u8bef\u5dee\u3002\u56e0\u6b64\uff0cDBPSK\u7684\u8fd9\u4e00\u7279\u6027\u4f7f\u5176\u5728\u5404\u79cd\u5e94\u7528\u573a\u666f\u4e2d\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u9760\u3002<\/p>\n\n\n\n

      \u3000\u3000\u5c3d\u7ba1DBPSK\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u4f1a\u6709\u8f83\u9ad8\u7684\u6bd4\u7279\u8bef\u7801\u7387(BER)\uff0c\u4f46\u5176\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u4ecd\u80fd\u63d0\u4f9b\u8f83\u597d\u7684\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u5728\u4f4e\u4fe1\u566a\u6bd4\u73af\u5883\u4e0b\uff0cDBPSK\u53ef\u80fd\u4e0d\u5982\u5176\u4ed6\u8c03\u5236\u65b9\u5f0f\u8868\u73b0\u826f\u597d\uff0c\u4f46\u5728\u8bb8\u591a\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5176\u8bef\u7801\u7387\u4ecd\u7136\u53ef\u4ee5\u63a5\u53d7\u3002<\/p>\n\n\n\n

      \u3000\u3000DBPSK\u8c03\u5236\u65b9\u5f0f\u901a\u8fc7\u7b80\u5316\u5b9e\u73b0\u3001\u63d0\u4f9b\u6052\u5b9a\u5305\u7edc\u4fe1\u53f7\u3001\u589e\u5f3a\u6297\u5e72\u6270\u80fd\u529b\u4ee5\u53ca\u9002\u5e94\u6027\u5f3a\u7b49\u4f18\u70b9\uff0c\u663e\u8457\u63d0\u9ad8\u4e86\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

      \u3000\u3000\u56db\u3001 Zigbee\u8c03\u5236\u65b9\u5f0f\u5728\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e2d\u7684\u9009\u62e9\u6807\u51c6<\/h2>\n\n\n\n

      \u3000\u3000Zigbee\u8c03\u5236\u65b9\u5f0f\u7684\u9009\u62e9\u6807\u51c6\u4e3b\u8981\u53d6\u51b3\u4e8e\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\uff0c\u5305\u62ec\u4f20\u8f93\u8ddd\u79bb\u3001\u6570\u636e\u901f\u7387\u3001\u529f\u8017\u548c\u6210\u672c\u7b49\u56e0\u7d20\u3002\u4ee5\u4e0b\u662f\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e2dZigbee\u8c03\u5236\u65b9\u5f0f\u9009\u62e9\u7684\u4e00\u4e9b\u6807\u51c6\uff1a<\/p>\n\n\n\n

      \u3000\u30001. \u4f20\u8f93\u8ddd\u79bb\u548c\u9891\u7387<\/strong>\uff1a<\/h3>\n\n\n\n

      \u3000\u3000\u5728\u6b27\u6d32\uff0cZigbee\u901a\u5e38\u4f7f\u7528868 MHz\u9891\u6bb5\uff0c\u800c\u5728\u5317\u7f8e\u5219\u4f7f\u7528915 MHz\u9891\u6bb5\u3002\u8fd9\u4e24\u4e2a\u9891\u6bb5\u5206\u522b\u91c7\u7528\u4e0d\u540c\u7684\u8c03\u5236\u65b9\u5f0f\uff1a868 MHz\u4f7f\u7528BPSK(\u4e8c\u8fdb\u5236\u76f8\u79fb\u952e\u63a7)\u8c03\u5236\uff0c\u800c915 MHz\u4f7f\u7528DSSS(\u76f4\u63a5\u5e8f\u5217\u6269\u9891)\u8c03\u5236\u3002<\/p>\n\n\n\n

      \u3000\u3000\u5728\u5168\u7403\u5176\u4ed6\u5730\u533a\uff0cZigbee\u4e3b\u8981\u4f7f\u75282.4 GHz\u9891\u6bb5\uff0c\u8be5\u9891\u6bb5\u91c7\u7528OQPSK(\u504f\u79fb\u56db\u76f8\u4f4d\u79fb\u952e\u63a7)\u8c03\u5236\uff0c\u8fd9\u79cd\u8c03\u5236\u65b9\u5f0f\u5728\u5b9e\u73b0\u76f8\u540c\u6216\u66f4\u597d\u7684\u6027\u80fd\u7684\u540c\u65f6\uff0c\u964d\u4f4e\u4e86\u4f20\u8f93\u529f\u7387\u3002<\/p>\n\n\n\n

      \u3000\u30002. \u6570\u636e\u901f\u7387<\/strong>\uff1a<\/h3>\n\n\n\n

      \u3000\u3000\u57282.4 GHz\u9891\u6bb5\u4e0b\uff0cZigbee\u7684\u6570\u636e\u901f\u7387\u4e3a20 Kbps;\u5728915 MHz\u9891\u6bb5\u4e0b\uff0c\u6570\u636e\u901f\u7387\u4e3a40 Kbps;\u800c\u5728868 MHz\u9891\u6bb5\u4e0b\uff0c\u6570\u636e\u901f\u7387\u53ef\u4ee5\u8fbe\u5230250 Kbps\u3002\u56e0\u6b64\uff0c\u6839\u636e\u6240\u9700\u7684\u6570\u636e\u901f\u7387\u9009\u62e9\u5408\u9002\u7684\u8c03\u5236\u65b9\u5f0f\u662f\u5173\u952e\u3002<\/p>\n\n\n\n

      \u3000\u30003. \u529f\u8017\u548c\u6210\u672c<\/strong>\uff1a<\/h3>\n\n\n\n

      \u3000\u3000Zigbee\u6280\u672f\u4ee5\u5176\u4f4e\u529f\u8017\u548c\u4f4e\u6210\u672c\u8457\u79f0\uff0c\u9002\u7528\u4e8e\u9700\u8981\u957f\u65f6\u95f4\u8fd0\u884c\u4e14\u4f9d\u8d56\u7535\u6c60\u4f9b\u7535\u7684\u5e94\u7528\u573a\u666f\u3002\u4f8b\u5982\uff0c\u5728\u667a\u80fd\u5bb6\u5c45\u7f51\u7edc\u3001\u5065\u5eb7\u76d1\u6d4b\u7cfb\u7edf\u7b49\u5e94\u7528\u4e2d\uff0cZigbee\u7684\u4f4e\u529f\u8017\u7279\u6027\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n\n\n\n

      \u3000\u3000\u5728\u8fd9\u4e9b\u5e94\u7528\u4e2d\uff0cOQPSK\u8c03\u5236\u56e0\u5176\u8f83\u4f4e\u7684\u529f\u8017\u800c\u88ab\u5e7f\u6cdb\u91c7\u7528\uff0c\u5c24\u5176\u662f\u57282.4 GHz\u9891\u6bb5\u4e2d\u3002<\/p>\n\n\n\n

      \u3000\u30004. \u73af\u5883\u6761\u4ef6\u548c\u53ef\u9760\u6027<\/strong>\uff1a<\/h3>\n\n\n\n

      \u3000\u3000\u5728\u6076\u52a3\u7684\u73af\u5883\u4e2d\uff0c\u5982\u5de5\u4e1a\u63a7\u5236\u6216\u5ba4\u5916\u5e94\u7528\uff0cZigbee\u91c7\u7528DSSS\u548cOQPSK\u8c03\u5236\u6280\u672f\u4ee5\u786e\u4fdd\u53ef\u9760\u4f20\u8f93\u3002DSSS\u8c03\u5236\u5728915 MHz\u9891\u6bb5\u4e2d\u4f7f\u7528\uff0c\u80fd\u591f\u63d0\u4f9b\u66f4\u9ad8\u7684\u6297\u5e72\u6270\u80fd\u529b\u3002<\/p>\n\n\n\n

      \u3000\u30005. \u7f51\u7edc\u62d3\u6251\u548c\u5e94\u7528\u573a\u666f<\/strong>\uff1a<\/h3>\n\n\n\n

      \u3000\u3000Zigbee\u652f\u6301\u591a\u79cd\u7f51\u7edc\u62d3\u6251\u7ed3\u6784\uff0c\u5305\u62ec\u661f\u578b\u3001\u6811\u578b\u548c\u7f51\u72b6\u7ed3\u6784\uff0c\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u4f20\u611f\u5668\u5e94\u7528\u3002\u9009\u62e9\u5408\u9002\u7684\u8c03\u5236\u65b9\u5f0f\u9700\u8981\u8003\u8651\u7f51\u7edc\u7684\u62d3\u6251\u7ed3\u6784\u4ee5\u53ca\u8282\u70b9\u4e4b\u95f4\u7684\u901a\u4fe1\u9700\u6c42\u3002<\/p>\n\n\n\n

      \u3000\u3000Zigbee\u8c03\u5236\u65b9\u5f0f\u7684\u9009\u62e9\u6807\u51c6\u4e3b\u8981\u57fa\u4e8e\u4f20\u8f93\u8ddd\u79bb\u3001\u6570\u636e\u901f\u7387\u3001\u529f\u8017\u3001\u6210\u672c\u4ee5\u53ca\u5e94\u7528\u573a\u666f\u7684\u7279\u5b9a\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u5728\u6b27\u6d32\u548c\u5317\u7f8e\u5e02\u573a\uff0c\u5206\u522b\u9009\u62e9868 MHz\u7684BPSK\u548c915 MHz\u7684DSSS\u8c03\u5236\u65b9\u5f0f;<\/p>\n\n\n\n

      \u3000\u3000\u4e94\u3001 Zigbee\u8c03\u5236\u65b9\u5f0f\u7684\u5b89\u5168\u6027\u5982\u4f55\uff0c\u7279\u522b\u662f\u5728\u76f4\u63a5\u5e8f\u5217\u6269\u9891(DSSS)\u6280\u672f\u7684\u5e94\u7528\u4e2d?<\/h2>\n\n\n\n

      \u3000\u3000Zigbee\u8c03\u5236\u65b9\u5f0f\u7684\u5b89\u5168\u6027\u5728\u76f4\u63a5\u5e8f\u5217\u6269\u9891(DSSS)\u6280\u672f\u7684\u5e94\u7528\u4e2d\u8868\u73b0\u51fa\u8272\u3002DSSS\u6280\u672f\u901a\u8fc7\u5c06\u539f\u59cb\u4fe1\u53f7\u4e0e\u4f2a\u968f\u673a\u566a\u58f0(PN)\u7801\u8fdb\u884c\u6a21\u4e8c\u52a0\u6cd5\u6765\u5b9e\u73b0\u4fe1\u53f7\u7684\u5bbd\u5e26\u6269\u5c55\uff0c\u4ece\u800c\u63d0\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u548c\u901a\u4fe1\u7684\u4fdd\u5bc6\u6027\u3002<\/p>\n\n\n\n

      \u3000\u3000\u5177\u4f53\u6765\u8bf4\uff0cDSSS\u6280\u672f\u80fd\u591f\u663e\u8457\u63d0\u9ad8\u5bf9\u5e72\u6270\u4fe1\u53f7\u7684\u9632\u62a4\u80fd\u529b\uff0c\u5c24\u5176\u662f\u5728\u9762\u5bf9\u7a84\u5e26\u5e72\u6270\u65f6\uff0c\u5176\u6548\u679c\u5c24\u4e3a\u660e\u663e\u3002\u6b64\u5916\uff0cDSSS\u6280\u672f\u8fd8\u63d0\u4f9b\u4e86\u591a\u5740\u63a5\u5165\u80fd\u529b\uff0c\u5f53\u4f7f\u7528\u591a\u4e2a\u6269\u9891\u7801\u65f6\uff0c\u53ef\u4ee5\u8fdb\u4e00\u6b65\u589e\u5f3a\u4f20\u8f93\u7684\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n

      \u3000\u3000Zigbee\u534f\u8bae\u8fd8\u7ed3\u5408\u4e86\u5176\u4ed6\u5b89\u5168\u673a\u5236\uff0c\u4f8b\u5982\u8f7d\u6ce2\u4fa6\u542c\u591a\u8def\u8bbf\u95ee\u4e0e\u78b0\u649e\u907f\u514d(CSMA-CA)\u673a\u5236\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u548c\u5b89\u5168\u6027\u3002\u8fd9\u79cd\u673a\u5236\u80fd\u591f\u6709\u6548\u907f\u514d\u901a\u4fe1\u62e5\u5835\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n\n\n\n

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