{"id":89370,"date":"2024-03-11T11:31:42","date_gmt":"2024-03-11T03:31:42","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=89370"},"modified":"2024-03-11T11:32:06","modified_gmt":"2024-03-11T03:32:06","slug":"xxtpkpjsylssm","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/89370.html","title":{"rendered":"\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u539f\u7406\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"\n

\u3000\u3000\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f(Linear Frequency Modulation, LFM)<\/strong>\u662f\u4e00\u79cd\u6269\u5c55\u9891\u8c31\u8c03\u5236\u6280\u672f\uff0c\u5176\u6838\u5fc3\u539f\u7406\u662f\u901a\u8fc7\u6539\u53d8\u4fe1\u53f7\u7684\u8f7d\u9891\u9891\u7387\u6765\u4f20\u8f93\u4fe1\u606f\u3002\u4e0e\u4f20\u7edf\u7684\u8c03\u5236\u6280\u672f\u76f8\u6bd4\uff0c\u7ebf\u6027\u8c03\u9891\u4e0d\u9700\u8981\u4f2a\u968f\u673a\u7f16\u7801\u5e8f\u5217\uff0c\u80fd\u591f\u4f7f\u4fe1\u53f7\u5360\u7528\u7684\u9891\u5e26\u5bbd\u5ea6\u8fdc\u5927\u4e8e\u4fe1\u606f\u5e26\u5bbd\uff0c\u4ece\u800c\u83b7\u5f97\u8f83\u5927\u7684\u7cfb\u7edf\u5904\u7406\u589e\u76ca\u3002\u8fd9\u79cd\u6280\u672f\u7684\u7279\u70b9\u662f\u53d1\u5c04\u7aef\u7684\u5c04\u9891\u8109\u51b2\u4fe1\u53f7\u5728\u4e00\u4e2a\u5468\u671f\u5185\uff0c\u5176\u8f7d\u9891\u7684\u9891\u7387\u4f5c\u7ebf\u6027\u53d8\u5316\u3002<\/p>\n\n\n\n

\u3000\u3000\u5177\u4f53\u6765\u8bf4\uff0c\u7ebf\u6027\u8c03\u9891\u4fe1\u53f7\u7684\u6570\u5b66\u8868\u8fbe\u5f0f\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a[s(t)=rect\\left(\\frac{t}{\\tau_0}\\right)e^{j2\\pi(f_0t+\\frac{\\mu}{2}t^2)}]\uff0c\u5176\u4e2d(f_0)\u4e3a\u96f7\u8fbe\u4e2d\u5fc3\u9891\u7387\uff0c(\\tau_0)\u4e3a\u77e9\u5f62\u4fe1\u53f7\u5bbd\u5ea6\uff0c(\\mu=B\/\\tau_0)\u662f\u7ebf\u6027\u8c03\u9891\u7cfb\u6570\uff0c\u5373\u8c03\u9891\u659c\u7387((B)\u4e3a\u5e26\u5bbd)\uff0c(rect\\left(\\frac{t}{\\tau_0}\\right))\u4e3a\u77e9\u5f62\u4fe1\u53f7\u3002<\/strong>\u8fd9\u79cd\u4fe1\u53f7\u5f62\u5f0f\u5728\u96f7\u8fbe\u7cfb\u7edf\u548c\u58f0\u5450\u7cfb\u7edf\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u56e0\u4e3a\u5b83\u5177\u6709\u5f88\u5927\u7684\u65f6\u5bbd\u5e26\u5bbd\u79ef\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8f83\u5927\u7684\u8109\u51b2\u538b\u7f29\u6bd4\u3002<\/p>\n\n\n\n

\u3000\u3000\u6b64\u5916\uff0c\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u8fd8\u88ab\u79f0\u4e3aChirp\u6269\u5c55\u9891\u8c31(CSS)\u6280\u672f\uff0c\u56e0\u4e3a\u5176\u9891\u8c31\u5e26\u5bbd\u843d\u4e8e\u53ef\u542c\u8303\u56f4\uff0c\u542c\u82e5\u9e1f\u58f0\uff0c\u56e0\u6b64\u5f97\u540d\u3002\u8fd9\u79cd\u6280\u672f\u4e0d\u4ec5\u63d0\u9ad8\u4e86\u901a\u4fe1\u7cfb\u7edf\u7684\u6297\u5e72\u6270\u6027\uff0c\u8fd8\u80fd\u591f\u5b9e\u73b0\u6bd4FSK\u7b49\u8c03\u5236\u6280\u672f\u66f4\u8fdc\u7684\u65e0\u7ebf\u901a\u4fe1\u8ddd\u79bb\u3002\u5728\u975e\u8702\u7a9d\u5e7f\u57df\u7f51\u7edc\u4e2d\uff0c\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u7684\u5e94\u7528\u5c24\u4e3a\u5173\u952e\uff0c\u5b83\u80fd\u591f\u63d0\u5347\u65e0\u7ebf\u901a\u4fe1\u7684\u6027\u80fd\u548c\u8ddd\u79bb\uff0c\u6709\u52a9\u4e8e\u7f51\u7edc\u89c4\u6a21\u5316\u7684\u5b9e\u73b0\u3002<\/p>\n\n\n\n

\u3000\u3000\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u901a\u8fc7\u6539\u53d8\u4fe1\u53f7\u7684\u8f7d\u9891\u9891\u7387\uff0c\u5e76\u5229\u7528\u5176\u72ec\u7279\u7684\u6570\u5b66\u8868\u8fbe\u5f0f\u548c\u7279\u6027\uff0c\u5b9e\u73b0\u4e86\u5bf9\u4fe1\u53f7\u5e26\u5bbd\u7684\u6709\u6548\u6269\u5c55\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u901a\u4fe1\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001 \u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6027\u80fd\u8868\u73b0\u5982\u4f55?<\/h2>\n\n\n\n

\u3000\u3000\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f(Linear Frequency Modulation, LFM)\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6027\u80fd\u8868\u73b0\u5177\u6709\u591a\u65b9\u9762\u7684\u7279\u70b9\u548c\u4f18\u52bf\u3002\u9996\u5148\uff0c\u7ebf\u6027\u8c03\u9891\u4fe1\u53f7\u56e0\u5176\u9891\u8c31\u5e26\u5bbd\u843d\u4e8e\u53ef\u542c\u8303\u56f4\uff0c\u88ab\u79f0\u4e3a\u9e1f\u58f0\u4fe1\u53f7\uff0c\u8fd9\u8868\u660e\u5176\u5728\u96f7\u8fbe\u3001\u58f0\u7eb3\u6280\u672f\u4e2d\u6709\u5e7f\u6cdb\u5e94\u7528\uff0c\u80fd\u591f\u589e\u5927\u5c04\u9891\u8109\u51b2\u5bbd\u5ea6\u3001\u52a0\u5927\u901a\u4fe1\u8ddd\u79bb\u3001\u63d0\u9ad8\u5e73\u5747\u53d1\u5c04\u529f\u7387\u3002\u6b64\u5916\uff0c\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u5728\u7535\u529b\u7ebf\u901a\u4fe1\u4e2d\u4e5f\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u80fd\u591f\u6709\u6548\u5730\u6269\u5c55\u9891\u8c31\u5e76\u6291\u5236\u5e72\u6270\u3002<\/p>\n\n\n\n

\u3000\u3000\u7136\u800c\uff0c\u8fd9\u79cd\u6280\u672f\u4e5f\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u5728\u4f20\u7edf\u7684\u8d85\u5bbd\u5e26\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u5b58\u5728\u7684\u8c03\u5236\u6548\u7387\u4f4e\u3001\u8bef\u7801\u7387\u6027\u80fd\u4f4e\u3001\u5b9e\u73b0\u590d\u6742\u9ad8\u7b49\u95ee\u9898\u3002\u5c3d\u7ba1\u5982\u6b64\uff0c\u5bf9\u4e8e\u7269\u8054\u7f51\u80cc\u666f\u4e0b\u7684\u673a\u5668\u5bf9\u673a\u5668\u901a\u4fe1\uff0c\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u63d0\u4f9b\u4e86\u9ad8\u5904\u7406\u589e\u76ca\u3001\u8fdc\u8ddd\u79bb\u53ef\u9760\u901a\u4fe1\u3001\u5728\u6076\u52a3\u73af\u5883\u4e2d\u5bf9\u5e72\u6270\u548c\u566a\u58f0\u7684\u9c81\u68d2\u6027\u7b49\u4f18\u70b9\uff0c\u4f46\u8fd9\u4e9b\u7279\u6027\u56e0\u9891\u8c31\u6548\u7387\u4f4e\u4e0b\u800c\u53d7\u5230\u635f\u5bb3\uff0c\u5bfc\u81f4\u6570\u636e\u4f20\u8f93\u901f\u7387\u975e\u5e38\u4f4e\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e3a\u4e86\u514b\u670d\u8fd9\u4e9b\u95ee\u9898\uff0c\u7814\u7a76\u8005\u63d0\u51fa\u4e86\u57fa\u4e8eFFT\u53d8\u6362\u5904\u7406\u4ee5\u53ca\u6b63\u4ea4\u4e8c\u5206\u5cf0\u5dee\u8f6f\u89e3\u8c03\u7684\u65b9\u6cd5\u6765\u6539\u5584\u7ebf\u6027\u8c03\u9891\u6269\u9891\u8c03\u5236\u6280\u672f\u7684\u6027\u80fd\u3002\u6b64\u5916\uff0cLoRa\u6280\u672f\u4f5c\u4e3a\u4e00\u79cd\u57fa\u4e8e\u7ebf\u6027\u8c03\u9891\u6269\u9891(CSS)\u7684\u53d8\u79cd\uff0c\u663e\u8457\u5730\u63d0\u9ad8\u4e86\u63a5\u53d7\u7075\u654f\u5ea6\uff0c\u4e0e\u5176\u4ed6\u6269\u9891\u6280\u672f\u4e00\u6837\uff0c\u4f7f\u7528\u524d\u5411\u7ea0\u9519(FEC)\u7279\u6027\uff0c\u8fdb\u4e00\u6b65\u63d0\u5347\u4e86\u901a\u4fe1\u7684\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

\u3000\u3000\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u5c55\u73b0\u51fa\u4e86\u826f\u597d\u7684\u6027\u80fd\uff0c\u5c24\u5176\u662f\u5728\u63d0\u9ad8\u901a\u4fe1\u8ddd\u79bb\u3001\u589e\u5f3a\u6297\u5e72\u6270\u80fd\u529b\u65b9\u9762\u8868\u73b0\u7a81\u51fa\u3002\u5c3d\u7ba1\u5b58\u5728\u4e00\u4e9b\u6311\u6218\uff0c\u5982\u8c03\u5236\u6548\u7387\u4f4e\u548c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4f4e\u7b49\u95ee\u9898\uff0c\u4f46\u901a\u8fc7\u6280\u672f\u521b\u65b0\u548c\u6539\u8fdb\uff0c\u8fd9\u4e9b\u95ee\u9898\u6b63\u5728\u5f97\u5230\u89e3\u51b3\uff0c\u4f7f\u5f97\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u5728\u672a\u6765\u7684\u53d1\u5c55\u524d\u666f\u4ecd\u7136\u4e50\u89c2\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001 \u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u4e0e\u5176\u4ed6\u6269\u9891\u6280\u672f(\u5982FSK\u3001QAM)\u76f8\u6bd4\u6709\u54ea\u4e9b\u4f18\u52bf\u548c\u52a3\u52bf?<\/h2>\n\n\n\n

\u3000\u3000\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f(\u5982LoRa)\u4e0e\u5176\u4ed6\u6269\u9891\u6280\u672f(\u5982FSK\u3001QAM)\u76f8\u6bd4\uff0c\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\u548c\u52a3\u52bf\uff1a<\/p>\n\n\n\n

\u3000\u3000\u4f18\u52bf\uff1a<\/h3>\n\n\n\n
    \n
  • \u3000\u3000\u4f4e\u529f\u8017\u7279\u6027<\/strong>\uff1a\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u4fdd\u6301\u4e86\u50cfFSK\u8c03\u5236\u76f8\u540c\u7684\u4f4e\u529f\u8017\u7279\u6027\uff0c\u8fd9\u5bf9\u4e8e\u9700\u8981\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u8bbe\u5907\u5c24\u4e3a\u91cd\u8981\uff0c\u5982\u7269\u8054\u7f51\u8bbe\u5907\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u589e\u52a0\u901a\u4fe1\u8ddd\u79bb<\/strong>\uff1a\u4e0e\u4f20\u7edf\u7684\u65e0\u7ebf\u7cfb\u7edf\u76f8\u6bd4\uff0c\u57fa\u4e8e\u7ebf\u6027\u8c03\u9891\u6269\u9891\u7684LoRa\u6280\u672f\u660e\u663e\u5730\u589e\u52a0\u4e86\u901a\u4fe1\u8ddd\u79bb\u3002\u8fd9\u4f7f\u5f97\u5b83\u7279\u522b\u9002\u5408\u4e8e\u8fdc\u8ddd\u79bb\u901a\u4fe1\u7684\u5e94\u7528\u573a\u666f\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u8d85\u9ad8\u7684\u63a5\u6536\u7075\u654f\u5ea6\u548c\u4fe1\u566a\u6bd4<\/strong>\uff1aLoRa\u6280\u672f\u672c\u8eab\u62e5\u6709\u8d85\u9ad8\u7684\u63a5\u6536\u7075\u654f\u5ea6\u548c\u8d85\u5f3a\u7684\u4fe1\u566a\u6bd4\uff0c\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u5728\u4fe1\u53f7\u8f83\u5f31\u7684\u60c5\u51b5\u4e0b\u4e5f\u80fd\u5b9e\u73b0\u6709\u6548\u7684\u6570\u636e\u4f20\u8f93\u3002<\/li>\n<\/ul>\n\n\n\n

    \u3000\u3000\u52a3\u52bf\uff1a<\/h3>\n\n\n\n

    \u3000\u3000\u53ef\u80fd\u7684\u590d\u6742\u6027<\/strong>\uff1a\u867d\u7136\u5177\u4f53\u7684\u8bc1\u636e\u6ca1\u6709\u76f4\u63a5\u63d0\u5230\uff0c\u4f46\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u76f8\u6bd4\u4e8e\u7b80\u5355\u7684\u8c03\u5236\u65b9\u5f0f\u5982FSK\uff0c\u57fa\u4e8e\u7ebf\u6027\u8c03\u9891\u6269\u9891\u7684\u6280\u672f\u53ef\u80fd\u4f1a\u66f4\u590d\u6742\u3002\u8fd9\u79cd\u590d\u6742\u6027\u53ef\u80fd\u6e90\u4e8e\u5176\u8c03\u5236\u673a\u5236\u548c\u5904\u7406\u4fe1\u53f7\u6240\u9700\u7684\u7b97\u6cd5\u3002<\/p>\n\n\n\n

    \u3000\u3000\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f(\u5982LoRa)\u7684\u4e3b\u8981\u4f18\u52bf\u5728\u4e8e\u5176\u4f4e\u529f\u8017\u3001\u957f\u8ddd\u79bb\u901a\u4fe1\u80fd\u529b\u4ee5\u53ca\u9ad8\u63a5\u6536\u7075\u654f\u5ea6\u548c\u4fe1\u566a\u6bd4\uff0c\u8fd9\u4e9b\u7279\u6027\u4f7f\u5176\u975e\u5e38\u9002\u5408\u4e8e\u7269\u8054\u7f51\u7b49\u9700\u8981\u8fdc\u8ddd\u79bb\u3001\u4f4e\u80fd\u8017\u901a\u4fe1\u7684\u5e94\u7528\u573a\u666f\u3002<\/strong>\u7136\u800c\uff0c\u76f8\u5bf9\u4e8e\u5176\u4ed6\u7b80\u5355\u7684\u8c03\u5236\u65b9\u5f0f\uff0c\u5982FSK\uff0c\u5b83\u53ef\u80fd\u5728\u5b9e\u73b0\u4e0a\u66f4\u4e3a\u590d\u6742\u3002<\/p>\n\n\n\n

    \u3000\u3000\u4e09\u3001 \u5982\u4f55\u4f18\u5316\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u7684\u53c2\u6570\u8bbe\u7f6e\u4ee5\u63d0\u9ad8\u901a\u4fe1\u7cfb\u7edf\u7684\u6297\u5e72\u6270\u80fd\u529b?<\/h2>\n\n\n\n

    \u3000\u3000\u8981\u4f18\u5316\u7ebf\u6027\u8c03\u9891\u6269\u9891\u6280\u672f\u7684\u53c2\u6570\u8bbe\u7f6e\u4ee5\u63d0\u9ad8\u901a\u4fe1\u7cfb\u7edf\u7684\u6297\u5e72\u6270\u80fd\u529b\uff0c\u53ef\u4ee5\u8003\u8651\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n

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