{"id":4035,"date":"2025-09-15T11:12:00","date_gmt":"2025-09-15T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/qam-modulation-how-it-improves-data-transmission-efficiency\/"},"modified":"2026-06-10T01:37:13","modified_gmt":"2026-06-10T01:37:13","slug":"qam-modulation-how-it-improves-data-transmission-efficiency","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/qam-modulation-how-it-improves-data-transmission-efficiency","title":{"rendered":"\u0110i\u1ec1u ch\u1ebf QAM l\u00e0 g\u00ec v\u00e0 n\u00f3 c\u1ea3i thi\u1ec7n vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u nh\u01b0 th\u1ebf n\u00e0o"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/55e713499f4c4776b14cd760975a2325.webp\" alt=\"What Is QAM Modulation and How Does It Improve Data Transmission\" class=\"wp-image-4033\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/55e713499f4c4776b14cd760975a2325.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/55e713499f4c4776b14cd760975a2325-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/55e713499f4c4776b14cd760975a2325-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/55e713499f4c4776b14cd760975a2325-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/55e713499f4c4776b14cd760975a2325-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eebng t\u1ef1 h\u1ecfi l\u00e0m th\u1ebf n\u00e0o b\u1ea1n c\u00f3 th\u1ec3 ph\u00e1t tr\u1ef1c tuy\u1ebfn phim \u0111\u1ed9 ph\u00e2n gi\u1ea3i 4K, tham gia cu\u1ed9c g\u1ecdi video HD v\u00e0 t\u1ea3i xu\u1ed1ng c\u00e1c t\u1ec7p l\u1edbn trong v\u00e0i gi\u00e2y ch\u01b0a? \u0110\u1eb1ng sau k\u1ef3 t\u00edch hi\u1ec7n \u0111\u1ea1i n\u00e0y v\u1ec1 kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt k\u1ef9 thu\u1eadt tinh vi: <strong>\u0110i\u1ec1u ch\u1ebf bi\u00ean \u0111\u1ed9 vu\u00f4ng pha (QAM)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 ng\u01b0\u1eddi h\u00f9ng th\u1ea7m l\u1eb7ng c\u1ee7a k\u1ef7 nguy\u00ean s\u1ed1, \u00e2m th\u1ea7m ho\u1ea1t \u0111\u1ed9ng trong b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi, \u0111i\u1ec7n tho\u1ea1i 5G v\u00e0 c\u00e1c m\u1ea1ng c\u00e1p quang r\u1ed9ng l\u1edbn t\u1ea1o n\u00ean x\u01b0\u01a1ng s\u1ed1ng c\u1ee7a internet. Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, ch\u00fang ta s\u1ebd l\u00e0m r\u00f5 kh\u00e1i ni\u1ec7m \u0111i\u1ec1u ch\u1ebf QAM, gi\u1ea3i th\u00edch l\u00fd do v\u00ec sao n\u00f3 c\u1ef1c k\u1ef3 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi t\u1ed1c \u0111\u1ed9 v\u00e0 cho th\u1ea5y c\u00e1ch th\u1ee9c n\u00f3 gi\u00fap c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn nh\u1ea5t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>b\u1ed9 thu ph\u00e1t quang<\/strong><\/a> m\u1edf r\u1ed9ng gi\u1edbi h\u1ea1n truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 \u0110i\u1ec3m n\u1ed5i b\u1eadt<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>QAM cho ph\u00e9p nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n di chuy\u1ec3n qua c\u00f9ng m\u1ed9t k\u00eanh. N\u00f3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 g\u00f3c pha c\u1ee7a t\u00edn hi\u1ec7u.<\/p><\/li><li><p>QAM gi\u00fap truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng th\u00eam b\u0103ng th\u00f4ng. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho internet t\u1ed1c \u0111\u1ed9 cao v\u00e0 truy\u1ec1n h\u00ecnh c\u00e1p.<\/p><\/li><li><p>C\u00f3 nhi\u1ec1u c\u1ea5p b\u1eadc QAM kh\u00e1c nhau, v\u00ed d\u1ee5 nh\u01b0 16QAM, 64QAM v\u00e0 256QAM. C\u00e1c c\u1ea5p b\u1eadc n\u00e0y cho bi\u1ebft s\u1ed1 l\u01b0\u1ee3ng k\u00fd hi\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eedi \u0111i. C\u1ea5p b\u1eadc cao h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n.<\/p><\/li><li><p>C\u1ea5p b\u1eadc QAM cao h\u01a1n mang l\u1ea1i t\u1ed1c \u0111\u1ed9 cao h\u01a1n nh\u01b0ng \u0111\u00f2i h\u1ecfi t\u00edn hi\u1ec7u s\u1ea1ch h\u01a1n. C\u1ea5p b\u1eadc th\u1ea5p h\u01a1n ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n khi t\u00edn hi\u1ec7u y\u1ebfu ho\u1eb7c nhi\u1ec5u.<\/p><\/li><li><p>QAM c\u1ef1c k\u1ef3 quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng hi\u1ec7n \u0111\u1ea1i. N\u00f3 gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t Wi-Fi v\u00e0 l\u00e0m cho truy\u1ec1n h\u00ecnh c\u00e1p c\u0169ng nh\u01b0 b\u0103ng th\u00f4ng r\u1ed9ng tr\u1edf n\u00ean hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 QAM l\u00e0 g\u00ec? M\u1ed9t ph\u00e9p so s\u00e1nh \u0111\u01a1n gi\u1ea3n<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 b\u1ea3n ch\u1ea5t, <strong>QAM<\/strong> l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p hai t\u00edn hi\u1ec7u \u0111i\u1ec1u ch\u1ebf bi\u00ean \u0111\u1ed9 th\u00e0nh m\u1ed9t k\u00eanh duy nh\u1ea5t. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng n\u00f3 gi\u1ed1ng nh\u01b0 ch\u00f2m sao. V\u1ecb tr\u00ed c\u1ee7a m\u1ed7i ng\u00f4i sao \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi hai gi\u00e1 tr\u1ecb: kho\u1ea3ng c\u00e1ch tr\u00ean tr\u1ee5c X v\u00e0 kho\u1ea3ng c\u00e1ch tr\u00ean tr\u1ee5c Y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">QAM th\u1ef1c hi\u1ec7n \u0111i\u1ec1u t\u01b0\u01a1ng t\u1ef1 v\u1edbi d\u1eef li\u1ec7u. N\u00f3 l\u1ea5y hai s\u00f3ng mang l\u1ec7ch pha 90 \u0111\u1ed9 (vu\u00f4ng pha), c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>Th\u00e0nh ph\u1ea7n \u0111\u1ed3ng pha (I)<\/strong> and <strong>Th\u00e0nh ph\u1ea7n vu\u00f4ng pha (Q)<\/strong> B\u1eb1ng c\u00e1ch thay \u0111\u1ed5i <strong>bi\u00ean \u0111\u1ed9<\/strong> c\u1ee7a m\u1ed7i s\u00f3ng, QAM t\u1ea1o ra m\u1ed9t k\u00fd hi\u1ec7u duy nh\u1ea5t bi\u1ec3u th\u1ecb m\u1ed9t m\u1eabu bit s\u1ed1 c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 QAM ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? L\u00f5i k\u1ef9 thu\u1eadt<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u k\u1ef3 di\u1ec7u c\u1ee7a QAM n\u1eb1m \u1edf hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3. M\u1ed9t s\u01a1 \u0111\u1ed3 QAM \u0111\u01a1n gi\u1ea3n c\u00f3 th\u1ec3 truy\u1ec1n 2 bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u. Nh\u01b0ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng nhi\u1ec1u m\u1ee9c bi\u00ean \u0111\u1ed9 h\u01a1n, ch\u00fang ta c\u00f3 th\u1ec3 n\u00e9n l\u01b0\u1ee3ng d\u1eef li\u1ec7u t\u0103ng theo c\u1ea5p s\u1ed1 m\u0169 v\u00e0o m\u1ed7i k\u00fd hi\u1ec7u. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi <strong>c\u1ea5p b\u1eadc QAM<\/strong> (v\u00ed d\u1ee5: 16-QAM, 64-QAM, 256-QAM).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>16-QAM<\/strong>: S\u1eed d\u1ee5ng 4 m\u1ee9c bi\u00ean \u0111\u1ed9 tr\u00ean m\u1ed7i s\u00f3ng, t\u1ea1o ra 16 k\u00fd hi\u1ec7u kh\u1ea3 thi (4\u00d74). M\u1ed7i k\u00fd hi\u1ec7u bi\u1ec3u di\u1ec5n <strong>4 bit<\/strong>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>64-QAM<\/strong>: S\u1eed d\u1ee5ng 8 m\u1ee9c bi\u00ean \u0111\u1ed9, t\u1ea1o ra 64 k\u00fd hi\u1ec7u, bi\u1ec3u di\u1ec5n <strong>6 bit<\/strong>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>256-QAM<\/strong>: S\u1eed d\u1ee5ng 16 m\u1ee9c bi\u00ean \u0111\u1ed9, t\u1ea1o ra 256 k\u00fd hi\u1ec7u, bi\u1ec3u di\u1ec5n <strong>8 bit<\/strong>.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">QAM b\u1eadc cao h\u01a1n = nhi\u1ec1u bit h\u01a1n tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u = t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n. \u0110\u00e2y l\u00e0 phi\u00ean b\u1ea3n k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a m\u1ed9t chi\u1ebfc xe t\u1ea3i l\u1edbn h\u01a1n ch\u1edf nhi\u1ec1u h\u00e0ng h\u00f3a h\u01a1n trong m\u1ed9t chuy\u1ebfn \u0111i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 B\u1ea3ng so s\u00e1nh b\u1eadc QAM<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a8da60ceb9643fdb5eff65b45c41066.webp\" alt=\"QAM Modulation\" class=\"wp-image-4034\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a8da60ceb9643fdb5eff65b45c41066.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a8da60ceb9643fdb5eff65b45c41066-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a8da60ceb9643fdb5eff65b45c41066-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a8da60ceb9643fdb5eff65b45c41066-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a8da60ceb9643fdb5eff65b45c41066-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>B\u1eadc QAM<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>K\u00fd hi\u1ec7u<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec7u qu\u1ea3 d\u1eef li\u1ec7u<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 b\u1ec1n v\u1edbi nhi\u1ec5u<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>QPSK (4-QAM)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>R\u1ea5t cao<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>16-QAM<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>16<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>64-QAM<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>64<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>6<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>256-QAM<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>256<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>8<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>R\u1ea5t cao<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>1024-QAM<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1024<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>C\u1ef1c \u0111oan<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>R\u1ea5t th\u1ea5p<\/strong><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i: QAM b\u1eadc cao h\u01a1n so v\u1edbi \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong k\u1ef9 thu\u1eadt kh\u00f4ng c\u00f3 b\u1eefa \u0103n mi\u1ec5n ph\u00ed. M\u1eb7c d\u00f9 QAM b\u1eadc cao h\u01a1n l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9, nh\u01b0ng n\u00f3 khi\u1ebfn c\u00e1c \u201c\u0111i\u1ec3m ch\u00f2m sao\u201d g\u1ea7n nhau h\u01a1n. \u0110i\u1ec1u n\u00e0y khi\u1ebfn t\u00edn hi\u1ec7u d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u v\u00e0 can nhi\u1ec5u h\u01a1n, gi\u1ed1ng nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/snr-signal-to-noise-ratio-and-its-impact-on-signal-quality\/\"><strong>T\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR)<\/strong><\/a> suy gi\u1ea3m. Ch\u1ec9 m\u1ed9t ch\u00fat nhi\u1ec5u c\u0169ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng khi\u1ebfn b\u1ed9 thu hi\u1ec3u sai m\u1ed9t k\u00fd hi\u1ec7u th\u00e0nh k\u00fd hi\u1ec7u kh\u00e1c, d\u1eabn \u0111\u1ebfn l\u1ed7i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do t\u1ed1c \u0111\u1ed9 Wi-Fi c\u1ee7a b\u1ea1n dao \u0111\u1ed9ng. B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn c\u1ee7a b\u1ea1n t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i gi\u1eefa <strong>256-QAM<\/strong> (g\u1ea7n b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn) v\u00e0 c\u00e1c b\u1eadc th\u1ea5p h\u01a1n nh\u01b0 <strong>16-QAM<\/strong> (\u1edf xa h\u01a1n) \u0111\u1ec3 duy tr\u00ec k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh b\u1ea5t ch\u1ea5p ch\u01b0\u1edbng ng\u1ea1i v\u1eadt v\u00e0 can nhi\u1ec5u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 QAM \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf \u0111\u00e2u? C\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n t\u01b0\u01a1ng t\u00e1c v\u1edbi QAM m\u1ed7i ng\u00e0y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Wi-Fi (802.11ac\/ax)<\/strong>: S\u1eed d\u1ee5ng 256-QAM v\u00e0 1024-QAM \u0111\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 gigabit.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>M\u1ea1ng 5G<\/strong>: Ph\u1ee5 thu\u1ed9c v\u00e0o QAM b\u1eadc cao (v\u00ed d\u1ee5: 256-QAM) \u0111\u1ec3 \u0111\u1ea1t dung l\u01b0\u1ee3ng kh\u1ed5ng l\u1ed3 v\u00e0 th\u00f4ng l\u01b0\u1ee3ng \u0111a gigabit.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Truy\u1ec1n h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1 (DVB-C)<\/strong>: Truy\u1ec1n h\u00ecnh c\u00e1p s\u1eed d\u1ee5ng QAM \u0111\u1ec3 truy\u1ec1n nhi\u1ec1u k\u00eanh HD qua m\u1ed9t c\u00e1p \u0111\u1ed3ng tr\u1ee5c duy nh\u1ea5t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Truy\u1ec1n th\u00f4ng quang s\u1ee3i<\/strong>: \u0110\u00e2y l\u00e0 l\u0129nh v\u1ef1c QAM th\u1ef1c s\u1ef1 t\u1ecfa s\u00e1ng cho c\u00e1c li\u00ean k\u1ebft d\u1eef li\u1ec7u c\u1ef1 ly xa v\u00e0 dung l\u01b0\u1ee3ng cao.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 QAM trong b\u1ed9 thu ph\u00e1t quang: L\u00e0m n\u1ec1n t\u1ea3ng cho \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi c\u1ee7a <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>module quang<br><\/strong><\/a>, QAM b\u1eadc cao l\u00e0 ch\u00eca kh\u00f3a \u0111\u00e1p \u1ee9ng nhu c\u1ea7u b\u0103ng th\u00f4ng to\u00e0n c\u1ea7u kh\u00f4ng bao gi\u1edd tho\u1ea3 m\u00e3n. <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/coherent-transceivers-high-speed-data-transmission-explained\/\"><strong>B\u1ed9 thu ph\u00e1t quang \u0111\u1ed3ng pha<\/strong><\/a> s\u1eed d\u1ee5ng c\u00e1c phi\u00ean b\u1ea3n tinh vi nh\u01b0 <strong>DP-16QAM<\/strong> (16QAM ph\u00e2n c\u1ef1c k\u00e9p) \u0111\u1ec3 truy\u1ec1n l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, b\u1ed9 thu ph\u00e1t <strong>QSFP-DD 400G-ZR<\/strong> b\u1ed9 thu ph\u00e1t g\u1eafn r\u1eddi c\u00f3 t\u00ednh nh\u1ea5t qu\u00e1n t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 \u0111i\u1ec1u ch\u1ebf ti\u00ean ti\u1ebfn \u0111\u1ec3 cung c\u1ea5p t\u1ed1c \u0111\u1ed9 400G tr\u00ean h\u00e0ng tr\u0103m kil\u00f4m\u00e9t. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p l\u00fd t\u01b0\u1edfng cho<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/data-center-interconnect-definition-benefits-and-role-of-optical-modules\/\"><strong>k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u (DCI)<\/strong><\/a> v\u00e0 m\u1ea1ng vi\u1ec5n th\u00f4ng, mang l\u1ea1i s\u1ef1 c\u00e2n b\u1eb1ng ho\u00e0n h\u1ea3o gi\u1eefa hi\u1ec7u su\u1ea5t cao, kho\u1ea3ng c\u00e1ch truy\u1ec1n xa v\u00e0 hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng. Khi b\u1ea1n \u0111ang \u0111\u00e1nh gi\u00e1<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26045-400g-qsfp-dd-osfp-qsfp112.htm\"><strong>b\u1ed9 thu ph\u00e1t quang 400G<br><\/strong><\/a>, vi\u1ec7c hi\u1ec3u r\u00f5 s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf n\u1ec1n t\u1ea3ng l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p nh\u1ea5t cho nhu c\u1ea7u m\u1ea1ng c\u1ee7a b\u1ea1n.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110ang t\u00ecm m\u1ed9t \u0111\u1ed1i t\u00e1c \u0111\u00e1ng tin c\u1eady cho c\u00e1c gi\u1ea3i ph\u00e1p k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao c\u1ee7a b\u1ea1n?<br><\/strong> Kh\u00e1m ph\u00e1 <strong>LINK-PP<\/strong>\u2018to\u00e0n b\u1ed9 danh m\u1ee5c s\u1ea3n ph\u1ea9m ti\u00ean ti\u1ebfn c\u1ee7a<br> <strong>quang h\u1ecdc k\u1ebft h\u1ee3p<br><\/strong> and <strong>b\u1ed9 thu ph\u00e1t h\u1ed7 tr\u1ee3 QAM<br><\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho c\u00e1c m\u1ea1ng th\u1ebf h\u1ec7 ti\u1ebfp theo.<br>. <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>Gh\u00e9 th\u0103m Trang web LINK-PP \u279e<br><\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 K\u1ebft lu\u1eadn &amp; C\u00e1c \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<br><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u ch\u1ebf QAM<br><\/strong> l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 n\u1ec1n t\u1ea3ng nh\u1eb1m truy\u1ec1n d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3. B\u1eb1ng c\u00e1ch kh\u00e9o l\u00e9o \u0111i\u1ec1u khi\u1ec3n bi\u00ean \u0111\u1ed9 c\u1ee7a hai s\u00f3ng, QAM cho ph\u00e9p ch\u00fang ta n\u00e9n nhi\u1ec1u bit h\u01a1n v\u00e0o m\u1ed7i gi\u00e2y, l\u00e0m n\u1ec1n t\u1ea3ng cho m\u1ecdi th\u1ee9 \u2014 t\u1eeb Wi-Fi gia \u0111\u00ecnh \u0111\u1ebfn c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng internet to\u00e0n c\u1ea7u.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd:<\/strong><br\/>\u2705 <strong>QAM<\/strong> QAM l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u0110i\u1ec1u ch\u1ebf Bi\u00ean \u0111\u1ed9 Vu\u00f4ng g\u00f3c.<br>.<br\/>\u2705 N\u00f3 n\u00e2ng cao hi\u1ec7u su\u1ea5t ph\u1ed5 b\u1eb1ng c\u00e1ch truy\u1ec1n nhi\u1ec1u<br> <strong>bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u<br><\/strong>.<br\/>\u2705 C\u00e1c c\u1ea5p \u0111\u1ed9 cao h\u01a1n (v\u00ed d\u1ee5:<br>, <strong>256-QAM<\/strong>) mang l\u1ea1i t\u1ed1c \u0111\u1ed9 cao h\u01a1n nh\u01b0ng y\u00eau c\u1ea7u t\u00edn hi\u1ec7u s\u1ea1ch h\u01a1n.<br>.<br\/>\u2705 N\u00f3 l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho<br> <strong>5G<\/strong>, <strong>Wi-Fi 6\/6E<br><\/strong>, v\u00e0 c\u00e1c<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/coherent-transceivers-high-speed-data-transmission-explained\/\"><strong>m\u00f4-\u0111un quang h\u1ecdc nh\u1ea5t qu\u00e1n t\u1ed1c \u0111\u1ed9 cao<\/strong><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi ch\u00fang ta ti\u1ebfn t\u1edbi 800G v\u00e0 1,6T, nh\u1eefng d\u1ea1ng QAM ti\u00ean ti\u1ebfn h\u01a1n n\u1eefa s\u1ebd ti\u1ebfp t\u1ee5c n\u1eb1m \u1edf trung t\u00e2m c\u1ee7a \u0111\u1ed5i m\u1edbi, \u0111\u1ea3m b\u1ea3o th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a ch\u00fang ta ng\u00e0y c\u00e0ng nhanh h\u01a1n v\u00e0 k\u1ebft n\u1ed1i t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n c\u00e1 nh\u00e2n h\u00f3a v\u00e0 kh\u00e1m ph\u00e1 s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >QAM l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">QAM l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u0110i\u1ec1u ch\u1ebf Bi\u00ean \u0111\u1ed9 Vu\u00f4ng g\u00f3c. B\u1ea1n b\u1eaft g\u1eb7p thu\u1eadt ng\u1eef n\u00e0y trong Wi-Fi, truy\u1ec1n h\u00ecnh c\u00e1p v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt s\u1ed1 kh\u00e1c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec khi\u1ebfn QAM kh\u00e1c bi\u1ec7t so v\u1edbi c\u00e1c lo\u1ea1i \u0111i\u1ec1u ch\u1ebf kh\u00e1c?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">QAM thay \u0111\u1ed5i bi\u00ean \u0111\u1ed9 v\u00e0 pha c\u1ee7a t\u00edn hi\u1ec7u. C\u00e1c lo\u1ea1i kh\u00e1c, nh\u01b0 AM ho\u1eb7c FM, ch\u1ec9 thay \u0111\u1ed5i m\u1ed9t y\u1ebfu t\u1ed1. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n truy\u1ec1n nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Bi\u1ec3u \u0111\u1ed3 ch\u00f2m sao QAM l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u1ec3u \u0111\u1ed3 ch\u00f2m sao QAM th\u1ec3 hi\u1ec7n t\u1ea5t c\u1ea3 c\u00e1c c\u00e1ch m\u00e0 m\u1ed9t t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n. M\u1ed7i ch\u1ea5m \u0111\u1ea1i di\u1ec7n cho m\u1ed9t t\u1ed5 h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a bi\u00ean \u0111\u1ed9 v\u00e0 pha. B\u1ea1n c\u00f3 th\u1ec3 h\u00ecnh dung n\u00f3 nh\u01b0 m\u1ed9t b\u1ea3n \u0111\u1ed3 d\u00e0nh cho t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu t\u00edn hi\u1ec7u b\u1ecb nhi\u1ec5u?<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>N\u1ebfu t\u00edn hi\u1ec7u c\u1ee7a b\u1ea1n b\u1ecb nhi\u1ec5u, thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ea5p QAM th\u1ea5p h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap duy tr\u00ec k\u1ebft n\u1ed1i, nh\u01b0ng t\u1ed1c \u0111\u1ed9 c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0o s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 QAM?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi<\/p><\/li><li><p>\u0110\u1ea7u thu truy\u1ec1n h\u00ecnh c\u00e1p<\/p><\/li><li><p>B\u1ed9 \u0111i\u1ec1u ch\u1ebf b\u0103ng th\u00f4ng r\u1ed9ng<br\/>B\u1ea1n s\u1eed d\u1ee5ng QAM khi truy c\u1eadp internet ho\u1eb7c xem truy\u1ec1n h\u00ecnh.<\/p><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\u0110i\u1ec1u ch\u1ebf QAM t\u0103ng c\u01b0\u1eddng vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i bi\u00ean \u0111\u1ed9 v\u00e0 pha, cho ph\u00e9p truy\u1ec1n th\u00f4ng nhanh h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n trong Wi-Fi, truy\u1ec1n h\u00ecnh c\u00e1p v\u00e0 b\u0103ng th\u00f4ng r\u1ed9ng.<\/p>","protected":false},"author":1,"featured_media":4033,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[26],"class_list":["post-4035","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4035","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=4035"}],"version-history":[{"count":2,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4035\/revisions"}],"predecessor-version":[{"id":9408,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4035\/revisions\/9408"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4033"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}