{"id":64,"date":"2026-03-01T16:27:41","date_gmt":"2026-03-01T08:27:41","guid":{"rendered":"https:\/\/hpu.gv.uy\/?p=64"},"modified":"2026-03-01T17:00:58","modified_gmt":"2026-03-01T09:00:58","slug":"gps%e6%b5%8b%e9%87%8f%e5%8e%9f%e7%90%86%e5%8f%8a%e5%85%b6%e5%ba%94%e7%94%a8-p19-20%e5%85%a8%e7%90%83%e5%ae%9a%e4%bd%8d%e7%b3%bb%e7%bb%9f%e7%9a%84%e7%bb%84%e6%88%90%e5%8f%8a%e4%bf%a1%e5%8f%b7%e7%bb%93","status":"publish","type":"post","link":"https:\/\/hpu.gv.uy\/?p=64","title":{"rendered":"GPS\u6d4b\u91cf\u539f\u7406\u53ca\u5176\u5e94\u7528 p19 20\u5168\u7403\u5b9a\u4f4d\u7cfb\u7edf\u7684\u7ec4\u6210\u53ca\u4fe1\u53f7\u7ed3\u6784\uff08\u56db\uff09"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u76ee\u5f55<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"#1-\u6d4b\u8ddd\u7801\u7684\u6982\u5ff5\u4e0e\u968f\u673a\u566a\u58f0\u7801\u7279\u6027\">1. \u6d4b\u8ddd\u7801\u7684\u6982\u5ff5\u4e0e\u968f\u673a\u566a\u58f0\u7801\u7279\u6027<\/a><\/li>\n\n\n\n<li><a href=\"#2-\u4f2a\u968f\u673a\u566a\u58f0\u7801-prn-\u7684\u5f15\u5165\u4e0e\u4f18\u52bf\">2. \u4f2a\u968f\u673a\u566a\u58f0\u7801 (PRN) \u7684\u5f15\u5165\u4e0e\u4f18\u52bf<\/a><\/li>\n\n\n\n<li><a href=\"#3-\u7801\u7684\u4e24\u79cd\u8868\u793a\u5f62\u5f0f\u4e0e\u8fd0\u7b97\u89c4\u5219\">3. \u7801\u7684\u4e24\u79cd\u8868\u793a\u5f62\u5f0f\u4e0e\u8fd0\u7b97\u89c4\u5219<\/a><\/li>\n\n\n\n<li><a href=\"#4-m\u5e8f\u5217\u7684\u4ea7\u751f\u539f\u7406\u7ebf\u6027\u53cd\u9988\u79fb\u4f4d\u5bc4\u5b58\u5668\">4. m\u5e8f\u5217\u7684\u4ea7\u751f\u539f\u7406\uff1a\u7ebf\u6027\u53cd\u9988\u79fb\u4f4d\u5bc4\u5b58\u5668<\/a><\/li>\n\n\n\n<li><a href=\"#5-\u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u72b6\u6001\u5468\u671f\u4e0e\u5168\u96f6\u7981\u533a\">5. \u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u72b6\u6001\u5468\u671f\u4e0e\u201c\u5168\u96f6\u201d\u7981\u533a<\/a><\/li>\n\n\n\n<li><a href=\"#6-ai-\u603b\u7ed3\">6. AI \u603b\u7ed3<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u6d4b\u8ddd\u7801\u7684\u6982\u5ff5\u4e0e\u968f\u673a\u566a\u58f0\u7801\u7279\u6027 <a href=\"https:\/\/www.bilibili.com\/video\/BV1ia4y1s7sj_p19?t=0\" target=\"_blank\" rel=\"noreferrer noopener\">\u539f\u7247 @ 00:00<\/a>*<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6d4b\u8ddd\u7801 (Ranging Code)<\/strong> \u662f GPS \u7cfb\u7edf\u4e2d\u7528\u4e8e\u6d4b\u5b9a\u536b\u661f\u5230\u63a5\u6536\u673a\u4e4b\u95f4\u8ddd\u79bb\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801\uff080 \u548c 1 \u7ec4\u6210\u7684\u5e8f\u5217\uff09\u3002\u7406\u89e3\u6d4b\u8ddd\u7801\u7684\u6838\u5fc3\u5728\u4e8e\u7406\u89e3\u5176<strong>\u81ea\u76f8\u5173 (Autocorrelation)<\/strong> \u548c <strong>\u4e92\u76f8\u5173 (Cross-correlation)<\/strong> \u7279\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.1 \u968f\u673a\u7801 (Random Noise Code) \u7684\u5b9a\u4e49<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u968f\u673a\u6027<\/strong>\uff1a\u968f\u673a\u7801\u662f\u4e00\u79cd\u4e8c\u8fdb\u5236\u4ee3\u7801\uff0c\u6bcf\u4e00\u4f4d\u662f 0 \u8fd8\u662f 1 \u662f\u5b8c\u5168\u968f\u673a\u7684\uff0c\u9884\u5148\u4e0d\u53ef\u77e5\u3002<\/li>\n\n\n\n<li><strong>\u6982\u7387\u6a21\u578b<\/strong>\uff1a\u5c31\u50cf\u4ece\u53e3\u888b\u91cc\u6478\u7403\uff0c\u6478\u5230 0 \u548c 1 \u7684\u6982\u7387\u5404\u4e3a 1\/2\u3002\u65e0\u8bba\u524d\u51e0\u4f4d\u662f\u4ec0\u4e48\uff0c\u4e0b\u4e00\u4f4d\u7684\u72b6\u6001\u90fd\u4e0d\u53d7\u5f71\u54cd\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">1.2 \u7406\u60f3\u7684\u76f8\u5173\u7cfb\u6570\u7279\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u7cbe\u786e\u6d4b\u8ddd\uff0c\u6d4b\u8ddd\u7801\u9700\u8981\u5177\u5907\u4f18\u826f\u7684\u76f8\u5173\u7279\u6027\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u81ea\u76f8\u5173\u7279\u6027 (Auto-correlation)<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li><strong>\u5bf9\u9f50\u65f6<\/strong>\uff1a\u5f53\u4e24\u4e2a\u76f8\u540c\u7684\u968f\u673a\u7801\u5b8c\u5168\u5bf9\u9f50\uff08\u65f6\u5ef6 \\tau = 0\uff09\u65f6\uff0c\u76f8\u5173\u7cfb\u6570\u4e3a <strong>1<\/strong>\uff08\u6700\u5927\u503c\uff09\u3002<\/li>\n\n\n\n<li><strong>\u9519\u5f00\u65f6<\/strong>\uff1a\u53ea\u8981\u9519\u5f00\u4e00\u4e2a\u7801\u5143\uff08\u751a\u81f3\u4e0d\u5230\u4e00\u4e2a\u7801\u5143\uff09\uff0c\u76f8\u5173\u7cfb\u6570\u8fc5\u901f\u4e0b\u964d\uff0c\u7406\u60f3\u60c5\u51b5\u4e0b\u63a5\u8fd1 <strong>0<\/strong>\u3002<\/li>\n\n\n\n<li><strong>\u56fe\u5f62\u63cf\u8ff0<\/strong>\uff1a\u81ea\u76f8\u5173\u51fd\u6570\u56fe\u5e94\u8be5\u662f\u4e00\u4e2a\u975e\u5e38\u5c16\u9510\u7684\u5cf0\u3002<\/li>\n\n\n\n<li><strong>\u7269\u7406\u610f\u4e49<\/strong>\uff1a\u5c16\u9510\u7684\u5cf0\u503c\u610f\u5473\u7740\u63a5\u6536\u673a\u53ef\u4ee5\u975e\u5e38\u654f\u9510\u5730\u5224\u65ad\u4fe1\u53f7\u662f\u5426\u5bf9\u9f50\u3002\u5982\u679c\u9519\u5f00\u4e00\u70b9\u70b9\uff0c\u76f8\u5173\u503c\u5c31\u5927\u5e45\u4e0b\u964d\uff0c\u8fd9\u6709\u5229\u4e8e<strong>\u9ad8\u7cbe\u5ea6\u7684\u6d4b\u8ddd<\/strong>\u3002\u5982\u679c\u6ce2\u5cf0\u5bbd\u5927\u8fdf\u949d\uff0c\u5219\u6d4b\u8ddd\u7cbe\u5ea6\u4f4e\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Screenshot-[03:51]<\/em><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u63d0\u793a\uff1a\u6b64\u5904\u5c55\u793a\u4e86\u81ea\u76f8\u5173\u51fd\u6570\u7684\u56fe\u5f62\u3002\u6a2a\u8f74\u662f\u4f4d\u79fb\uff08\u7801\u5143\u504f\u79fb\uff09\uff0c\u7eb5\u8f74\u662f\u76f8\u5173\u7cfb\u6570\u3002\u53ef\u4ee5\u770b\u5230\u5728 0\u70b9\u5904\u6709\u4e00\u4e2a\u5c16\u9510\u7684\u5cf0\u503c\uff08R=1\uff09\uff0c\u800c\u5411\u5de6\u6216\u5411\u53f3\u504f\u79fb\u540e\uff0c\u6570\u503c\u8fc5\u901f\u5f52\u96f6\u3002\u8fd9\u6f14\u793a\u4e86\u7406\u60f3\u6d4b\u8ddd\u7801\u7684\u7279\u6027\u3002<\/p>\n<\/blockquote>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4e92\u76f8\u5173\u7279\u6027 (Cross-correlation)<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u4e24\u4e2a\u5b8c\u5168\u4e0d\u540c\u7684\u968f\u673a\u7801\uff0c\u65e0\u8bba\u5982\u4f55\u79fb\u52a8\u6216\u5bf9\u9f50\uff0c\u5b83\u4eec\u4e4b\u95f4\u7684\u76f8\u5173\u7cfb\u6570\u59cb\u7ec8\u63a5\u8fd1 <strong>0<\/strong>\u3002<\/li>\n\n\n\n<li><strong>\u7269\u7406\u610f\u4e49<\/strong>\uff1a\u8fd9\u610f\u5473\u7740\u4e0d\u540c\u536b\u661f\u53d1\u5c04\u7684\u4fe1\u53f7\u4e92\u4e0d\u5e72\u6270\uff08\u591a\u5740\u5e72\u6270\u5c0f\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u4f2a\u968f\u673a\u566a\u58f0\u7801 (PRN) \u7684\u5f15\u5165\u4e0e\u4f18\u52bf <a href=\"https:\/\/www.bilibili.com\/video\/BV1ia4y1s7sj_p19?t=577\" target=\"_blank\" rel=\"noreferrer noopener\">\u539f\u7247 @ 09:37<\/a>*<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u867d\u7136\u968f\u673a\u566a\u58f0\u7801\u7684\u76f8\u5173\u7279\u6027\u975e\u5e38\u9002\u5408\u6d4b\u8ddd\uff0c\u4f46\u5b83\u5728\u5de5\u7a0b\u4e0a\u6709\u4e00\u4e2a\u81f4\u547d\u7f3a\u9677\uff1a<strong>\u4e0d\u53ef\u590d\u5236<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 \u968f\u673a\u7801\u7684\u7f3a\u9677<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65e0\u6cd5\u590d\u73b0<\/strong>\uff1a\u536b\u661f\u4ea7\u751f\u4e00\u4e2a\u968f\u673a\u5e8f\u5217\u53d1\u5c04\u51fa\u6765\uff0c\u4f46\u5730\u9762\u63a5\u6536\u673a\u65e0\u6cd5\u4ea7\u751f\u4e00\u4e2a<strong>\u4e00\u6a21\u4e00\u6837<\/strong>\u7684\u968f\u673a\u5e8f\u5217\u6765\u8fdb\u884c\u6bd4\u5bf9\uff08\u76f8\u5173\u8fd0\u7b97\uff09\u3002\u56e0\u4e3a\u5b83\u662f\u968f\u673a\u7684\uff0c\u4e0b\u4e00\u4f4d\u662f\u4ec0\u4e48\u8c01\u90fd\u4e0d\u77e5\u9053\u3002<\/li>\n\n\n\n<li><strong>\u6d4b\u8ddd\u539f\u7406\u8981\u6c42<\/strong>\uff1a\u6d4b\u8ddd\u672c\u8d28\u662f\u6d4b\u91cf\u4fe1\u53f7\u4f20\u64ad\u65f6\u95f4\uff0c\u8fd9\u8981\u6c42\u63a5\u6536\u673a\u5fc5\u987b\u80fd\u5728\u672c\u5730\u4ea7\u751f\u4e00\u4e2a\u4e0e\u536b\u661f\u4fe1\u53f7\u7ed3\u6784\u5b8c\u5168\u4e00\u81f4\u7684\u590d\u5236\u7801\uff0c\u901a\u8fc7\u8c03\u6574\u65f6\u5ef6\u6765\u5bf9\u9f50\u4e24\u8005\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 \u4f2a\u968f\u673a\u566a\u58f0\u7801 (Pseudo-Random Noise Code, PRN)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\uff0cGPS \u91c7\u7528\u4e86<strong>\u4f2a\u968f\u673a\u566a\u58f0\u7801<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u201c\u4f2a\u201d (Pseudo)<\/strong>\uff1a\u5b83\u4e0d\u662f\u771f\u6b63\u7684\u968f\u673a\u3002\u5b83\u662f\u7531\u7279\u5b9a\u7684\u7535\u8def\uff08\u4fe1\u53f7\u53d1\u751f\u5668\uff09\u6216\u7b97\u6cd5\u4ea7\u751f\u7684\uff0c\u662f\u6709\u89c4\u5f8b\u7684\u3002\u53ea\u8981\u7ed9\u5b9a\u4e86\u7535\u8def\u7ed3\u6784\u548c\u521d\u503c\uff0c\u4ea7\u751f\u7684\u7801\u5e8f\u5217\u5c31\u662f\u786e\u5b9a\u7684\u3001\u53ef\u91cd\u590d\u7684\u3002<\/li>\n\n\n\n<li><strong>\u201c\u968f\u673a\u201d\u7279\u6027<\/strong>\uff1a\u867d\u7136\u5b83\u662f\u786e\u5b9a\u7684\uff0c\u4f46\u5728\u7edf\u8ba1\u7279\u6027\u4e0a\uff08\u4e3b\u8981\u662f\u81ea\u76f8\u5173\u548c\u4e92\u76f8\u5173\u7279\u6027\uff09\uff0c\u5b83\u975e\u5e38\u63a5\u8fd1\u4e8e\u968f\u673a\u566a\u58f0\u7801\u3002\n<ul class=\"wp-block-list\">\n<li><strong>\u4fdd\u7559\u4f18\u52bf<\/strong>\uff1a\u5177\u6709\u5c16\u9510\u7684\u81ea\u76f8\u5173\u5cf0\u503c\uff0c\u5229\u4e8e\u7cbe\u786e\u6d4b\u8ddd\u3002<\/li>\n\n\n\n<li><strong>\u89e3\u51b3\u7f3a\u9677<\/strong>\uff1a\u536b\u661f\u548c\u63a5\u6536\u673a\u4f7f\u7528\u76f8\u540c\u7684\u7535\u8def\u53c2\u6570\uff0c\u5c31\u80fd\u4ea7\u751f\u5b8c\u5168\u76f8\u540c\u7684\u7801\u5e8f\u5217\uff0c\u4ece\u800c\u5b9e\u73b0\u4fe1\u53f7\u7684\u6355\u83b7\u548c\u8ddf\u8e2a\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u7801\u7684\u4e24\u79cd\u8868\u793a\u5f62\u5f0f\u4e0e\u8fd0\u7b97\u89c4\u5219 <a href=\"https:\/\/www.bilibili.com\/video\/BV1ia4y1s7sj_p19?t=759\" target=\"_blank\" rel=\"noreferrer noopener\">\u539f\u7247 @ 12:39<\/a>*<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 GPS \u4fe1\u53f7\u5904\u7406\u4e2d\uff0c\u6d4b\u8ddd\u7801\u6709\u4e24\u79cd\u7b49\u6548\u7684\u8868\u793a\u65b9\u5f0f\uff0c\u5206\u522b\u5bf9\u5e94\u4e0d\u540c\u7684\u6570\u5b66\u8fd0\u7b97\u89c4\u5219\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 \u4e8c\u8fdb\u5236\u5e8f\u5217\u8868\u793a (Binary Sequence)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6570\u503c<\/strong>\uff1a\u4f7f\u7528 <strong>0<\/strong> \u548c <strong>1<\/strong>\u3002<\/li>\n\n\n\n<li><strong>\u8fd0\u7b97<\/strong>\uff1a<strong>\u6a21\u4e8c\u76f8\u52a0 (Modulo-2 Addition)<\/strong>\u3002\n<ul class=\"wp-block-list\">\n<li>\u89c4\u5219\uff1a0+0=0, 0+1=1, 1+0=1, 1+1=0\uff08\u76f8\u5f53\u4e8e\u5f02\u6216\u8fd0\u7b97 XOR\uff09\u3002<\/li>\n\n\n\n<li>\u7528\u4e8e\u903b\u8f91\u7535\u8def\u8bbe\u8ba1\u548c\u72b6\u6001\u5206\u6790\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 \u56fe\u5f62\/\u6ce2\u5f62\u8868\u793a (Waveform Representation)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6570\u503c<\/strong>\uff1a\u4f7f\u7528\u7535\u5e73\u5e45\u5ea6 <strong>+1<\/strong> \u548c <strong>-1<\/strong>\u3002\n<ul class=\"wp-block-list\">\n<li>\u4e8c\u8fdb\u5236 <strong>0<\/strong> \u5bf9\u5e94\u5e45\u5ea6 <strong>+1<\/strong>\u3002<\/li>\n\n\n\n<li>\u4e8c\u8fdb\u5236 <strong>1<\/strong> \u5bf9\u5e94\u5e45\u5ea6 <strong>-1<\/strong>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u56fe\u5f62<\/strong>\uff1a\u8868\u73b0\u4e3a\u77e9\u5f62\u6ce2\uff08Square Wave\uff09\u3002<\/li>\n\n\n\n<li><strong>\u8fd0\u7b97<\/strong>\uff1a<strong>\u4e58\u6cd5\u8fd0\u7b97 (Multiplication)<\/strong>\u3002\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u5e94\u5173\u7cfb\uff1a\n<ul class=\"wp-block-list\">\n<li>\u4e8c\u8fdb\u5236\u7684\u201c\u6a21\u4e8c\u52a0 0\u201d \\leftrightarrow \u6ce2\u5f62\u7684\u201c\u4e58 +1\u201d (\u4e0d\u53d8)\u3002<\/li>\n\n\n\n<li>\u4e8c\u8fdb\u5236\u7684\u201c\u6a21\u4e8c\u52a0 1\u201d \\leftrightarrow \u6ce2\u5f62\u7684\u201c\u4e58 -1\u201d (\u53cd\u76f8)\u3002<\/li>\n\n\n\n<li>\u4f8b\u5982\uff1a\u4e8c\u8fdb\u5236 0+0=0 \u5bf9\u5e94\u6ce2\u5f62 (+1) \\times (+1) = +1 (\u5373 0)\u3002<\/li>\n\n\n\n<li>\u4f8b\u5982\uff1a\u4e8c\u8fdb\u5236 0+1=1 \u5bf9\u5e94\u6ce2\u5f62 (+1) \\times (-1) = -1 (\u5373 1)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5e94\u7528<\/strong>\uff1a\u5728\u8ba1\u7b97\u76f8\u5173\u7cfb\u6570\u65f6\uff0c\u901a\u5e38\u4f7f\u7528\u6ce2\u5f62\u4e58\u6cd5\u79ef\u5206\u7684\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Screenshot-[13:47]<\/em><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u63d0\u793a\uff1a\u56fe\u4e2d\u5c55\u793a\u4e86\u4e8c\u8fdb\u5236\u7801\u5e8f\u5217\uff080, 1&#8230;\uff09\u4e0e\u5bf9\u5e94\u77e9\u5f62\u6ce2\uff08+1, -1&#8230;\uff09\u7684\u8f6c\u6362\u5173\u7cfb\u3002\u7406\u89e3\u8fd9\u79cd\u6620\u5c04\u5bf9\u4e8e\u540e\u7eed\u7406\u89e3\u4fe1\u53f7\u8c03\u5236\u548c\u89e3\u8c03\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">4. m\u5e8f\u5217\u7684\u4ea7\u751f\u539f\u7406\uff1a\u7ebf\u6027\u53cd\u9988\u79fb\u4f4d\u5bc4\u5b58\u5668 <a href=\"https:\/\/www.bilibili.com\/video\/BV1ia4y1s7sj_p19?t=977\" target=\"_blank\" rel=\"noreferrer noopener\">\u539f\u7247 @ 16:17<\/a>*<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">GPS \u4e2d\u6700\u57fa\u672c\u7684\u4f2a\u968f\u673a\u7801\u4ea7\u751f\u5668\u662f\u57fa\u4e8e <strong>m\u5e8f\u5217 (Maximum Length Sequence)<\/strong> \u7684\u3002\u5176\u786c\u4ef6\u5b9e\u73b0\u4f9d\u8d56\u4e8e <strong>\u7ebf\u6027\u53cd\u9988\u79fb\u4f4d\u5bc4\u5b58\u5668 (Linear Feedback Shift Register, LFSR)<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 \u7535\u8def\u7ed3\u6784<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e00\u4e2a <strong>4\u7ea7 (4-stage)<\/strong> \u79fb\u4f4d\u5bc4\u5b58\u5668\u4e3a\u4f8b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u79fb\u4f4d\u5bc4\u5b58\u5668 (Shift Register)<\/strong>\uff1a\u7531\u591a\u4e2a\u5b58\u50a8\u5355\u5143\uff08\u5bc4\u5b58\u5668\uff09\u4e32\u8054\uff0c\u5728\u65f6\u949f\u8109\u51b2 (Clock Pulse) \u9a71\u52a8\u4e0b\uff0c\u6570\u636e\u4f9d\u6b21\u5411\u53f3\u79fb\u52a8\u3002<\/li>\n\n\n\n<li><strong>\u53cd\u9988\u56de\u8def (Feedback Loop)<\/strong>\uff1a\u53d6\u67d0\u4e9b\u7279\u5b9a\u7ea7\uff08\u4f8b\u5982\u7b2c3\u7ea7\u548c\u7b2c4\u7ea7\uff09\u7684\u8f93\u51fa\u3002<\/li>\n\n\n\n<li><strong>\u6a21\u4e8c\u76f8\u52a0<\/strong>\uff1a\u5c06\u53d6\u51fa\u7684\u4f4d\u8fdb\u884c\u6a21\u4e8c\u76f8\u52a0\u8fd0\u7b97\u3002<\/li>\n\n\n\n<li><strong>\u8f93\u5165<\/strong>\uff1a\u5c06\u8fd0\u7b97\u7ed3\u679c\u53cd\u9988\u8f93\u5165\u5230\u7b2c1\u7ea7\u5bc4\u5b58\u5668\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Screenshot-[16:32]<\/em><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u63d0\u793a\uff1a\u8fd9\u662f\u4e00\u4e2a4\u7ea7\u7ebf\u6027\u53cd\u9988\u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u539f\u7406\u56fe\u3002\u53ef\u4ee5\u770b\u5230\u56db\u4e2a\u65b9\u6846\u4ee3\u8868\u5bc4\u5b58\u5668\uff0c\u65f6\u949f\u4fe1\u53f7\u9a71\u52a8\u6570\u636e\u5411\u53f3\u6d41\u52a8\uff0c\u672b\u5c3e\u7684\u4fe1\u53f7\u88ab\u5f15\u51fa\uff0c\u4e0e\u7b2c\u4e09\u7ea7\u7684\u4fe1\u53f7\u8fdb\u884c\u6a21\u4e8c\u76f8\u52a0\uff08\u2295\u7b26\u53f7\uff09\uff0c\u7ed3\u679c\u53c8\u56de\u5230\u4e86\u7b2c\u4e00\u7ea7\u3002\u8fd9\u662f\u4ea7\u751f\u4f2a\u968f\u673a\u7801\u7684\u6838\u5fc3\u786c\u4ef6\u6a21\u578b\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 \u72b6\u6001\u6f14\u53d8\u793a\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u521d\u59cb\u72b6\u6001\u4e3a\u5168 1 (1, 1, 1, 1)\uff0c\u7535\u8def\u8fd0\u884c\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u521d\u59cb\u72b6\u6001<\/strong>\uff1a1, 1, 1, 1\u3002<\/li>\n\n\n\n<li><strong>\u7b2c1\u4e2a\u8109\u51b2<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7b2c3\u7ea7(1) \u548c \u7b2c4\u7ea7(1) \u6a21\u4e8c\u76f8\u52a0\uff1a1 \\oplus 1 = 0\u3002<\/li>\n\n\n\n<li>\u53cd\u9988\uff1a0 \u8fdb\u5165\u7b2c1\u7ea7\u3002<\/li>\n\n\n\n<li>\u79fb\u4f4d\uff1a\u539f\u7b2c1,2,3\u7ea7\u7684\u503c\u79fb\u5165\u7b2c2,3,4\u7ea7\u3002<\/li>\n\n\n\n<li>\u65b0\u72b6\u6001\uff1a0, 1, 1, 1\u3002\u8f93\u51fa\u539f\u7b2c4\u7ea7\u7684\u503c\uff1a<strong>1<\/strong>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7b2c2\u4e2a\u8109\u51b2<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7b2c3\u7ea7(1) \u548c \u7b2c4\u7ea7(1) \u6a21\u4e8c\u76f8\u52a0\uff1a1 \\oplus 1 = 0\u3002<\/li>\n\n\n\n<li>\u53cd\u9988\uff1a0 \u8fdb\u5165\u7b2c1\u7ea7\u3002<\/li>\n\n\n\n<li>\u65b0\u72b6\u6001\uff1a0, 0, 1, 1\u3002\u8f93\u51fa\u539f\u7b2c4\u7ea7\u7684\u503c\uff1a<strong>1<\/strong>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>&#8230;\u4ee5\u6b64\u7c7b\u63a8\uff0c\u7535\u8def\u4f1a\u904d\u5386\u5404\u79cd\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Screenshot-[18:47]<\/em><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u63d0\u793a\uff1a\u8fd9\u91cc\u5c55\u793a\u4e86\u5bc4\u5b58\u5668\u72b6\u6001\u968f\u65f6\u95f4\u53d8\u5316\u7684\u5217\u8868\u3002\u6bcf\u4e00\u884c\u4ee3\u8868\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u540e\u7684\u5bc4\u5b58\u5668\u5185\u5bb9\uff081\/0\u72b6\u6001\uff09\u4ee5\u53ca\u8f93\u51fa\u4f4d\u3002\u901a\u8fc7\u8ffd\u8e2a\u8fd9\u4e2a\u8868\uff0c\u53ef\u4ee5\u9a8c\u8bc1\u4ea7\u751f\u7684\u5e8f\u5217\u662f\u5426\u7b26\u5408\u9884\u671f\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u72b6\u6001\u5468\u671f\u4e0e\u201c\u5168\u96f6\u201d\u7981\u533a <a href=\"https:\/\/www.bilibili.com\/video\/BV1ia4y1s7sj_p19?t=1351\" target=\"_blank\" rel=\"noreferrer noopener\">\u539f\u7247 @ 22:31<\/a>*<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 \u72b6\u6001\u603b\u6570\u4e0e m \u5e8f\u5217\u957f\u5ea6<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u4e8e n \u7ea7\u79fb\u4f4d\u5bc4\u5b58\u5668\uff0c\u6bcf\u4e2a\u5bc4\u5b58\u5668\u6709 0 \u6216 1 \u4e24\u79cd\u72b6\u6001\u3002<\/li>\n\n\n\n<li>\u7406\u8bba\u4e0a\u603b\u7684\u72b6\u6001\u7ec4\u5408\u6709 2^n \u79cd\u3002<\/li>\n\n\n\n<li><strong>\u5168\u96f6\u72b6\u6001 (Forbidden State)<\/strong>\uff1a\u72b6\u6001 0, 0, 0, 0 \u662f\u4e0d\u5141\u8bb8\u51fa\u73b0\u7684\u3002\n<ul class=\"wp-block-list\">\n<li>\u539f\u56e0\uff1a\u5982\u679c\u5bc4\u5b58\u5668\u5168\u4e3a 0\uff0c\u5219\u53cd\u9988 0 \\oplus 0 = 0\uff0c\u4e0b\u4e00\u523b\u8fd8\u662f\u5168 0\u3002\u7535\u8def\u5c06\u9677\u5165\u201c\u6b7b\u5faa\u73af\u201d\uff0c\u6c38\u8fdc\u8f93\u51fa 0\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6700\u5927\u5468\u671f\u957f\u5ea6<\/strong>\uff1a\u6392\u9664\u5168\u96f6\u72b6\u6001\u540e\uff0cm\u5e8f\u5217\u7684\u6700\u5927\u957f\u5ea6\uff08\u5468\u671f\uff09\u4e3a\uff1a<br>N = 2^n &#8211; 1 \u8fd9\u610f\u5473\u7740\u4ea7\u751f\u7684\u7801\u5e8f\u5217\u5728 2^n &#8211; 1 \u4f4d\u4e4b\u540e\u4f1a\u91cd\u590d\uff0c\u5f00\u59cb\u4e0b\u4e00\u4e2a\u5faa\u73af\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 \u5b9e\u9645\u5e94\u7528\u4e3e\u4f8b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>4\u7ea7\u5bc4\u5b58\u5668<\/strong>\uff1a\u5468\u671f N = 2^4 &#8211; 1 = 15\u3002\u5373\u4ea7\u751f 15 \u4f4d\u957f\u7684\u7801\u5e8f\u5217\u540e\u91cd\u590d\u3002<\/li>\n\n\n\n<li><strong>10\u7ea7\u5bc4\u5b58\u5668 (GPS C\/A\u7801)<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>GPS \u7684 C\/A \u7801\u4f7f\u7528 10 \u7ea7\u79fb\u4f4d\u5bc4\u5b58\u5668\u3002<\/li>\n\n\n\n<li>\u5468\u671f N = 2^{10} &#8211; 1 = 1023\u3002<\/li>\n\n\n\n<li>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 C\/A \u7801\u7684\u7801\u957f\u662f 1023 \u7801\u5143 (Chips)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 \u7801\u7387\u4e0e\u65f6\u95f4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7801\u7387 (Chip Rate)<\/strong>\uff1a\u53d6\u51b3\u4e8e\u9a71\u52a8\u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u65f6\u949f\u8109\u51b2\u9891\u7387\u3002\u65f6\u949f\u9891\u7387\u662f\u591a\u5c11\uff0c\u8f93\u51fa\u7801\u7387\u5c31\u662f\u591a\u5c11\u3002<\/li>\n\n\n\n<li><strong>\u7801\u5143\u5bbd\u5ea6<\/strong>\uff1a\u65f6\u949f\u8109\u51b2\u95f4\u9694\u7684\u65f6\u95f4\u5373\u4e3a\u4e00\u4e2a\u7801\u5143\u7684\u6301\u7eed\u65f6\u95f4\uff08\u5bbd\u5ea6\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6. AI \u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u8282\u89c6\u9891\u6df1\u5165\u8bb2\u89e3\u4e86 GPS \u7cfb\u7edf\u4e2d<strong>\u6d4b\u8ddd\u7801<\/strong>\u7684\u6838\u5fc3\u539f\u7406\u3002\u9996\u5148\u4ecb\u7ecd\u4e86<strong>\u968f\u673a\u566a\u58f0\u7801<\/strong>\u5177\u6709\u7406\u60f3\u7684\u81ea\u76f8\u5173\u7279\u6027\uff08\u5bf9\u9f50\u65f6\u4e3a1\uff0c\u9519\u5f00\u5373\u4e3a0\uff09\uff0c\u975e\u5e38\u9002\u5408\u7cbe\u786e\u6d4b\u8ddd\uff0c\u4f46\u56e0\u5176\u4e0d\u53ef\u590d\u5236\u6027\u65e0\u6cd5\u76f4\u63a5\u5e94\u7528\u4e8e\u5de5\u7a0b\u3002\u56e0\u6b64\uff0cGPS \u5f15\u5165\u4e86<strong>\u4f2a\u968f\u673a\u566a\u58f0\u7801 (PRN)<\/strong>\uff0c\u5b83\u65e2\u5177\u5907\u968f\u673a\u7801\u4f18\u826f\u7684\u76f8\u5173\u7279\u6027\uff0c\u53c8\u662f\u786e\u5b9a\u4e14\u53ef\u590d\u5236\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u89c6\u9891\u8be6\u7ec6\u6f14\u793a\u4e86 PRN \u7684\u4ea7\u751f\u673a\u5236\u2014\u2014<strong>\u7ebf\u6027\u53cd\u9988\u79fb\u4f4d\u5bc4\u5b58\u5668 (LFSR)<\/strong>\u3002\u91cd\u70b9\u8bb2\u89e3\u4e86\u4e8c\u8fdb\u5236\uff080\/1\uff09\u4e0e\u6ce2\u5f62\uff08+1\/-1\uff09\u7684\u5bf9\u5e94\u5173\u7cfb\uff0c\u4ee5\u53ca\u6a21\u4e8c\u76f8\u52a0\u8fd0\u7b97\u89c4\u5219\u3002\u901a\u8fc7 4 \u7ea7\u5bc4\u5b58\u5668\u7684\u5b9e\u4f8b\uff0c\u63a8\u5bfc\u4e86 m \u5e8f\u5217\u7684\u751f\u6210\u8fc7\u7a0b\uff0c\u6307\u51fa\u4e86<strong>\u5168\u96f6\u72b6\u6001<\/strong>\u4f1a\u5bfc\u81f4\u6b7b\u5faa\u73af\uff0c\u56e0\u6b64 n \u7ea7\u5bc4\u5b58\u5668\u4ea7\u751f\u7684 m \u5e8f\u5217\u6700\u5927\u5468\u671f\u4e3a 2^n &#8211; 1\u3002\u8fd9\u4e00\u6570\u5b66\u539f\u7406\u76f4\u63a5\u51b3\u5b9a\u4e86 GPS C\/A \u7801 1023 \u4e2a\u7801\u957f\u7684\u7531\u6765\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 1. \u6d4b\u8ddd\u7801\u7684\u6982\u5ff5\u4e0e\u968f\u673a\u566a\u58f0\u7801\u7279\u6027 \u539f\u7247 @ 00:00* \u6d4b\u8ddd\u7801 (Ranging Code) \u662f G [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[3,2],"tags":[6,4],"class_list":["post-64","post","type-post","status-publish","format-standard","hentry","category-gps","category-note","tag-ai","tag-4"],"_links":{"self":[{"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=\/wp\/v2\/posts\/64","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=64"}],"version-history":[{"count":1,"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions"}],"predecessor-version":[{"id":65,"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions\/65"}],"wp:attachment":[{"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=64"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=64"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hpu.gv.uy\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=64"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}