{"id":52,"date":"2007-02-27T03:14:08","date_gmt":"2007-02-26T19:14:08","guid":{"rendered":"http:\/\/learn-house.idv.tw\/?p=52"},"modified":"2010-01-16T14:01:27","modified_gmt":"2010-01-16T06:01:27","slug":"%e4%bd%95%e8%ac%82fdma%e3%80%81tdma%e3%80%81cdma%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/learn-house.idv.tw\/?p=52","title":{"rendered":"\u4f55\u8b02FDMA\u3001TDMA\u3001CDMA\uff1f"},"content":{"rendered":"<p>\u7db2\u8def\u8490\u96c6\u6587\u7ae0&nbsp;<\/p>\n<p>\u4f55\u8b02FDMA\u3001TDMA\u3001CDMA\uff1f<\/p>\n<p>  \u591a\u91cd\u63a5\u53d6(Multiple Access)\u6280\u8853\uff0c\u4f9d\u65b9\u5f0f\u5206\u6709FDMA\u3001TDMA\u3001CDMA\u4e09 \u7a2e\u3002\u591a\u91cd\u63a5\u53d6\u7684\u529f\u80fd\u4e3b\u8981\u662f\u4f5c\u70ba\u63a7\u5236\u983b\u5bec\u8cc7\u6e90\u4e4b\u7528\uff0c\u7531\u65bc\u884c\u52d5\u96fb\u8a71\u4f7f\u7528\u7684 \u7121\u7dda\u96fb\u983b\u5bec\u5341\u5206\u6709\u9650\uff0c\u4e26\u4e0d\u50cf\u6709\u7dda\u7db2\u8def\u53ea\u8981\u62bd\u63db\u6216\u52a0\u8216\u7dda\u8def\u5373\u53ef\u589e\u52a0\u983b\u5bec\uff0c\u56e0\u6b64 \u983b\u5bec\u7684\u4f7f\u7528\u5fc5\u9808\u96a8\u6a5f\u8abf\u914d\uff0c\u4e5f\u5c31\u662f\u7528\u6236\u8981\u6253\u96fb\u8a71\u6642\uff0c\u7cfb\u7d71\u624d\u6307\u6d3e\u983b\u5bec\u7d66\u7528\u6236\u4f7f\u7528 \uff0c\u4e26\u65bc\u901a\u8a71\u7d50\u675f\u5f8c\u53d6\u56de\u983b\u5bec\uff0c\u4ee5\u4fbf\u6307\u6d3e\u7d66\u7a0d\u5f8c\u8981\u6253\u96fb\u8a71\u7684\u7528\u6236\u4f7f\u7528\u3002<\/p>\n<p>  FDMA\u7684\u65b9\u5f0f\u662f\u5728\u983b\u7387\u4e0a\u76f4\u63a5\u5207\u5272\uff0c\u5c07\u5168\u6578\u983b\u5bec\u5207\u6210\u6bcf\u500b\u7b49\u5bec\u983b\u5e36\u7684 \u901a\u9053\uff0c\u6bcf\u500b\u901a\u9053\u53ef\u4f9b\u4e00\u500b\u7528\u6236\u4f7f\u7528\u3002TDMA(\u5982GSM)\u5247\u662f\u5148\u5207\u6210\u5e7e\u500b\u7565 \u5c0f\u7684\u983b\u5e36(\u6b64\u4e00\u52d5\u4f5c\u4e0d\u662f\u5fc5\u9808\u7684\uff0c\u8a66\u7cfb\u7d71\u800c\u5b9a)\uff0c\u7136\u5f8c\u6bcf\u500b\u983b\u5e36\u4e0a\u518d\u5207\u5272\u6210\u6642\u9593 \u7b49\u9577\u7684\u6642\u69fd(Slot)\uff0c\u82e5\u5e72\u500b\u6642\u69fd\u518d\u7d50\u5408\u6210\u8a0a\u6846(Frame)\uff0c\u6bcf\u500b\u8a0a\u6846\u7684\u7b2c\u4e00\u865f \u6642\u69fd\u7d44\u6210TDMA\u7684\u7b2c\u4e00\u865f\u901a\u9053\uff0c\u5176\u9918\u4f9d\u6b64\u985e\u63a8\uff0c\u6bcf\u4e00\u901a\u9053\u4f9b\u4e00\u7528\u6236\u4f7f\u7528\uff0c\u5982\u6b64\u4e0d \u540c\u7528\u6236\u7684\u8a0a\u865f\u4fbf\u4e0d\u81f3\u65bc\u91cd\u758a\u3002<\/p>\n<p>  \u4e00\u500b\u884c\u52d5\u96fb\u8a71\u7cfb\u7d71\u4e4b\u5bb9\u91cf\u5c31\u50cf\u4e00\u9593\u6703\u8b70 \u5ba4\u7684\u7a7a\u9593\uff0cFDMA\u53caTDMA\u5c31\u50cf\u662f\u5c07\u5927\u6703\u8b70\u5ba4\u5206\u9694\u6210\u8a31\u591a\u5c0f\u6703\u8b70\u5ba4\uff0c\u7528\u6236\u8981\u7528\u6642\uff0c\u5c31\u5206\u6d3e\u7d66\u4e00\u9593\u5c0f\u6703 \u8b70\u5ba4\uff0c\u5982\u6b64\u53ef\u4ee5\u7d66\u591a\u7528\u6236\u4f7f\u7528\uff1b\u800cCDMA\u5247\u662f\u4e0d\u9694\u9593\uff0c\u4f46\u4e0d\u540c\u7528\u6236\u4f7f\u7528\u4e0d\u540c\u7684\u5c55\u983b \u78bc(Spreading Code)\u4f86\u8abf\u8b8a\uff0c\u63a5\u6536\u5668\u53ef\u4f9d\u4e0d\u540c\u5c55\u983b\u78bc\u4f86\u904e\u6ffe\u6389\u5176\u4ed6\u7528\u6236\u8a0a\u865f\u800c\u53d6 \u51fa\u9700\u8981\u7684\u8cc7\u8a0a\u3002<\/p>\n<p>  Bellsouth\u5de5\u7a0b\u8655\u9577Keith Radousky\u6307\u51fa\uff0cCDMA\u597d\u6bd4\u5728\u4e00\u9593\u623f\u9593\u4e2d\uff0c\u540c \u6642\u6709\u4e00\u7d44\u4eba\u7528\u4e2d\u6587\u4ea4\u8ac7\u800c\u53e6\u4e00\u7d44\u4eba\u7528\u82f1\u6587\u4ea4\u8ac7\uff0c\u5f7c\u6b64\u6703\u6709\u5e72\u64fe\u7684\u7522\u751f\uff0c\u5373\u5728\u4e2d\u6587 \u807d\u8005\u8033\u4e2d\u82f1\u6587\u53ea\u662f\u8f03\u5927\u7684\u566a\u97f3\u800c\u5df2\uff0c\u4e26\u4e0d\u6703\u5f71\u97ff\u5230\u807d\u4e2d\u6587\u7684\u8fa8\u8b58\u80fd\u529b\uff0c\u56e0\u6b64\u53ef \u4ee5\u5728\u540c\u4e00\u6642\u9593\u3001\u7a7a\u9593\uff0c\u6709\u591a\u7d44\u4eba\u7528\u4e0d\u540c\u8a9e\u8a00\u4ea4\u8ac7\u3002\u4f46\u7576\u6578\u76ee\u591a\u5230\u4e00\u5b9a\u7a0b\u5ea6\u6642\uff0c\u5f7c\u6b64 \u8ddd\u96e2\u5fc5\u9808\u62c9\u8fd1\u624d\u80fd\u807d\u898b\uff0c\u6b64\u6642\u6db5\u84cb\u7387\u76f8\u5c0d\u964d\u4f4e\uff0c\u5bb9\u91cf\u4ea6\u53d7\u9650\u5236\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><font face=\"Arial\" color=\"#0000ff\"><font face=\"Times New Roman, Times, serif\" size=\"4\"><strong>FHSS <font color=\"#ff9900\">VS<\/font> <\/strong><\/font><\/font><font face=\"Arial\" color=\"#0000ff\"><font face=\"Times New Roman, Times, serif\" size=\"4\"><strong>DSSS<\/strong><\/font><\/font><\/p>\n<p><span class=\"px10\">FHSS\u70baFrequency-hopping spread-spectrum\u7684\u7c21\u7a31\uff0c\u8b6f\u70ba\u8df3\u983b\u5c55\u983b\u6280\u8853\uff0c\u6b64\u6280\u8853\u662f\u5c07          2.4 GHz\u5340\u9593\u5207\u5272\u621070\u500b\u4ee5\u4e0a\u7684\u983b\u9053\uff0c\u5229\u7528\u7a84\u983b\u8f09\u6ce2\u5728\u4e0d\u540c\u7684\u983b\u9053\u9593\u4ee5\u5354\u5b9a\u7684\u983b\u9053\u8df3\u8e8d\u9806\u5e8f\u4f86\u50b3\u9001\u8a0a\u865f\u3002\u50b3\u9001\u6642\u7684\u983b\u7387\u5229\u7528\u865b\u64ec\u4e82\u6578\uff08pseudo          random\uff09\u505a\u4efb\u610f\u8b8a\u52d5\uff0c\u4f46\u5fc5\u9808\u540c\u6b65\u5728\u6536\u767c\u5169\u7aef\u90fd\u77e5\u9053\u7684\u7bc4\u570d\u624d\u80fd\u6b63\u78ba\u6536\u767c\u3002FHSS\u5177\u5099\u5b89\u5168\u7684\u7279\u6027\uff0c\u5141\u8a31\u591a\u7a2e\u7db2\u8def\u5171\u5b58\u65bc\u4e00\u500b\u5be6\u9ad4\u5340\u57df\u4e2d\uff0c\u9069\u5408\u50b3\u8f38\u983b\u5bec\u7a84\u3001\u8ddd\u96e2\u8f03\u77ed\u7684\u7121\u7dda\u7db2\u8def\u61c9\u7528\u3002<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"px10\">DSSS\u70baDirect Sequence Spread Spectrum\u7684\u7c21\u7a31\uff0c\u8b6f\u70ba\u76f4\u63a5\u5e8f\u5217\u5c55\u983b\u6280\u8853\uff0c\u6b64\u6280\u8853\u662f\u5c07\u539f\u4f86\u7684\u50b3\u905e\u8a0a\u865f\u300c1\u300d\u6216\u300c0\u300d\uff0c\u5229\u752810\u500b\u4ee5\u4e0a\u7684Chip\u4f86\u4ee3\u8868\u300c1\u300d\u6216\u300c0\u300d\u539f\u59cb\u8a0a\u865f\u5c55\u958b\u6210 \u6578\u500d\u983b\u5bec\u7684\u8a0a\u865f\uff0c\u4f7f\u5f97\u539f\u4f86\u8f03\u9ad8\u529f\u7387\u3001\u8f03\u7a84\u7684\u983b\u7387\u8b8a\u6210\u8f03\u5bec\u7684\u4f4e\u529f\u7387\u983b\u7387\uff0c\u4ee5\u6709\u6548\u63a7\u5236\u96dc\u8a0a\u5e72\u64fe\u4e26\u9632\u6b62\u8a0a\u865f\u88ab\u622a\u53d6\u3002\u76ee\u524d\u5728\u7121\u7dda\u7db2\u8def\u7684\u61c9\u7528\u4e0a\uff0c\u4f7f\u752811\u4f4d\u5143\u7684\u5c55\u958b \u78bc\u5c07\u539f\u4f86\u7684\u7121\u7dda\u96fb\u6ce2\u8a0a\u865f\u5c55\u958b\u70ba11\u500d\u5f8c\u518d\u50b3\u9001\u3002<\/span> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7db2\u8def\u8490\u96c6\u6587\u7ae0&nbsp; \u4f55\u8b02FDMA\u3001TDMA\u3001CDMA\uff1f \u591a\u91cd\u63a5\u53d6(Multiple Access)\u6280\u8853\uff0c<span class=\"post-excerpt-end\">&hellip;<\/span><\/p>\n<p class=\"more-link\"><a href=\"https:\/\/learn-house.idv.tw\/?p=52\" class=\"themebutton\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-52","post","type-post","status-publish","format-standard","hentry","category-8"],"_links":{"self":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=52"}],"version-history":[{"count":0,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/52\/revisions"}],"wp:attachment":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}