{"id":5085,"date":"2025-09-12T00:00:00","date_gmt":"2025-09-12T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/what-you-should-know-about-qpsk-modulation-basics-advantages\/"},"modified":"2026-06-22T07:21:00","modified_gmt":"2026-06-22T07:21:00","slug":"what-you-should-know-about-qpsk-modulation-basics-advantages","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-you-should-know-about-qpsk-modulation-basics-advantages","title":{"rendered":"Nh\u1eefng \u0111i\u1ec1u b\u1ea1n c\u1ea7n bi\u1ebft v\u1ec1 \u0111i\u1ec1u ch\u1ebf QPSK"},"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\/58746f50c6254f5c859cafce06230d66.webp\" alt=\"What You Should Know About QPSK Modulation\" class=\"wp-image-5083\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/58746f50c6254f5c859cafce06230d66.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/58746f50c6254f5c859cafce06230d66-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/58746f50c6254f5c859cafce06230d66-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/58746f50c6254f5c859cafce06230d66-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/58746f50c6254f5c859cafce06230d66-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u1ea3n giao h\u01b0\u1edfng v\u00f4 h\u00ecnh c\u1ee7a truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, m\u1ed7i bit d\u1eef li\u1ec7u \u0111\u1ec1u c\u1ea7n m\u1ed9t \u201cgi\u1ecdng n\u00f3i\u201d r\u00f5 r\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3. Trong s\u1ed1 c\u00e1c k\u1ef9 thu\u1eadt kh\u00e1c nhau l\u00e0m \u0111i\u1ec1u n\u00e0y tr\u1edf n\u00ean kh\u1ea3 thi, <strong>\u0110i\u1ec1u ch\u1ebf QPSK<\/strong> \u0111\u00f3ng vai tr\u00f2 m\u1ed9t nh\u1ea1c tr\u01b0\u1edfng c\u01a1 b\u1ea3n v\u00e0 \u0111\u00e1ng kinh ng\u1ea1c v\u1ec1 m\u1eb7t \u0111\u1ed9 b\u1ec1n. D\u00f9 b\u1ea1n \u0111ang ph\u00e1t tr\u1ef1c tuy\u1ebfn video, nh\u1eadn t\u00edn hi\u1ec7u GPS hay duy\u1ec7t web, QPSK r\u1ea5t c\u00f3 th\u1ec3 \u0111ang \u0111\u1ea3m nhi\u1ec7m vai tr\u00f2 then ch\u1ed1t \u1edf h\u1eadu tr\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i vi\u1ebft n\u00e0y s\u1ebd l\u00e0m s\u00e1ng t\u1ecf <strong>QPSK l\u00e0 g\u00ec<\/strong>, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng v\u00e0 l\u00fd do v\u00ec sao n\u00f3 v\u1eabn l\u00e0 n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng s\u1ed1 hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a3 Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>QPSK<\/strong> c\u00f3 ngh\u0129a l\u00e0 <strong>\u0110i\u1ec1u ch\u1ebf D\u1ecbch pha Vu\u00f4ng g\u00f3c<\/strong>. N\u00f3 truy\u1ec1n d\u1eef li\u1ec7u s\u1ed1 b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i pha c\u1ee7a t\u00edn hi\u1ec7u. \u0110i\u1ec1u n\u00e0y gi\u00fap truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p><\/li><li><p>Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ebf n\u00e0y truy\u1ec1n hai bit cho m\u1ed7i k\u00fd hi\u1ec7u. Nh\u1edd \u0111\u00f3, t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u0103ng g\u1ea5p \u0111\u00f4i so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u0169 h\u01a1n nh\u01b0 BPSK.<\/p><\/li><li><p>QPSK ho\u1ea1t \u0111\u1ed9ng t\u1ed1t ngay c\u1ea3 khi c\u00f3 nhi\u1ec5u. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y tr\u00ean \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, Wi-Fi v\u00e0 v\u1ec7 tinh.<\/p><\/li><li><p>Vi\u1ec7c s\u1eed d\u1ee5ng QPSK ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p truy\u1ec1n nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n trong c\u00f9ng m\u1ed9t kho\u1ea3ng kh\u00f4ng gian. T\u1eeb \u0111\u00f3 d\u1eabn \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 t\u1ea3i xu\u1ed1ng nhanh h\u01a1n v\u00e0 cu\u1ed9c g\u1ecdi r\u00f5 r\u00e0ng h\u01a1n.<\/p><\/li><li><p>Hi\u1ec3u bi\u1ebft v\u1ec1 QPSK c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p. B\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u nh\u1ea5t cho nhu c\u1ea7u v\u1ec1 t\u1ed1c \u0111\u1ed9 ho\u1eb7c \u0111\u1ed9 tin c\u1eady trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng s\u1ed1 c\u1ee7a m\u00ecnh.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a3 QPSK l\u00e0 g\u00ec?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">QPSK, hay c\u00f2n g\u1ecdi l\u00e0 <strong>\u0110i\u1ec1u ch\u1ebf D\u1ecbch pha Vu\u00f4ng g\u00f3c<\/strong>, l\u00e0 m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf s\u1ed1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u qua s\u00f3ng v\u00f4 tuy\u1ebfn, c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0 <strong>c\u00e1c li\u00ean k\u1ebft s\u1ee3i quang<\/strong>. \u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea1ng <strong>\u0110i\u1ec1u ch\u1ebf d\u1ecbch chuy\u1ec3n pha (PSK)<\/strong> truy\u1ec1n d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i (\u0111i\u1ec1u ch\u1ebf) pha c\u1ee7a t\u00edn hi\u1ec7u tham chi\u1ebfu (s\u00f3ng mang).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb \u201cVu\u00f4ng g\u00f3c\u201d trong t\u00ean g\u1ecdi c\u1ee7a n\u00f3 \u00e1m ch\u1ec9 vi\u1ec7c s\u1eed d\u1ee5ng hai s\u00f3ng mang l\u1ec7ch pha nhau 90 \u0111\u1ed9 \u2014 m\u1ed9t s\u00f3ng sin (I, th\u00e0nh ph\u1ea7n \u0111\u1ed3ng pha) v\u00e0 m\u1ed9t s\u00f3ng cosin (Q, th\u00e0nh ph\u1ea7n vu\u00f4ng pha). Vi\u1ec7c kh\u00e9o l\u00e9o s\u1eed d\u1ee5ng hai s\u00f3ng mang tr\u1ef1c giao n\u00e0y ch\u00ednh l\u00e0 ch\u00eca kh\u00f3a t\u1ea1o n\u00ean hi\u1ec7u qu\u1ea3 c\u1ee7a QPSK.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a3 QPSK ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? B\u00ed m\u1eadt c\u1ee7a 4 pha<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"580\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0a5e1ce503e84c398d7b47a51ad6352f.webp\" alt=\"Quadrature Phase Shift Keying\" class=\"wp-image-5084\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0a5e1ce503e84c398d7b47a51ad6352f.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0a5e1ce503e84c398d7b47a51ad6352f-300x145.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0a5e1ce503e84c398d7b47a51ad6352f-1024x495.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0a5e1ce503e84c398d7b47a51ad6352f-768x371.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0a5e1ce503e84c398d7b47a51ad6352f-18x9.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n h\u01a1n <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/bpsk-modulation-basics-how-bpsk-works-in-digital-communication\/\"><strong>BPSK<\/strong><\/a> (d\u00f9ng hai pha \u0111\u1ec3 bi\u1ec3u di\u1ec5n 1 bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u), QPSK s\u1eed d\u1ee5ng b\u1ed1n d\u1ecbch pha ph\u00e2n bi\u1ec7t \u0111\u1ec3 bi\u1ec3u di\u1ec5n d\u1eef li\u1ec7u. M\u1ed7i d\u1ecbch pha duy nh\u1ea5t m\u00e3 h\u00f3a m\u1ed9t k\u00fd hi\u1ec7u hai bit ri\u00eang bi\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed1n d\u1ecbch pha ti\u00eau chu\u1ea9n l\u00e0: 45\u00b0, 135\u00b0, 225\u00b0 v\u00e0 315\u00b0. M\u1ed7i pha n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t trong b\u1ed1n t\u1ed5 h\u1ee3p hai bit c\u00f3 th\u1ec3:<\/p>\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;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>D\u1ecbch pha (\u0111\u1ed9)<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Hai bit (I, Q)<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>K\u00fd hi\u1ec7u<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>45\u00b0<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>(0, 0)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>00<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>135\u00b0<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>(0, 1)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>01<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>225\u00b0<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>(1, 1)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>11<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>315\u00b0<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>(1, 0)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 v\u1edbi m\u1ed7i k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i, QPSK g\u1eedi <strong>hai bit<\/strong> th\u00f4ng tin. Do \u0111\u00f3, <strong>t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u0103ng g\u1ea5p \u0111\u00f4i<\/strong> so v\u1edbi BPSK trong c\u00f9ng b\u0103ng th\u00f4ng, khi\u1ebfn QPSK tr\u1edf th\u00e0nh m\u1ed9t k\u1ef9 thu\u1eadt <strong>\u0111i\u1ec1u ch\u1ebf hi\u1ec7u qu\u1ea3 v\u1ec1 ph\u1ed5<\/strong> .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a QPSK: V\u00ec sao QPSK l\u1ea1i ph\u1ed5 bi\u1ebfn \u0111\u1ebfn v\u1eady?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Hi\u1ec7u qu\u1ea3 v\u1ec1 b\u0103ng th\u00f4ng:<\/strong> Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp, kh\u1ea3 n\u0103ng truy\u1ec1n 2 bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u khi\u1ebfn QPSK hi\u1ec7u qu\u1ea3 g\u1ea5p \u0111\u00f4i so v\u1edbi BPSK \u2014 m\u1ed9t y\u1ebfu t\u1ed1 then ch\u1ed1t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng ph\u1ed5 b\u1ecb chi\u1ebfm d\u1ee5ng d\u00e0y \u0111\u1eb7c.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 b\u1ec1n:<\/strong> QPSK t\u01b0\u01a1ng \u0111\u1ed1i kh\u00e1ng l\u1ea1i s\u1ef1 suy gi\u1ea3m t\u00edn hi\u1ec7u v\u00e0 nhi\u1ec5u so v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf b\u1eadc cao h\u01a1n (nh\u01b0 64-QAM). \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho <strong>truy\u1ec1n th\u00f4ng \u0111\u01b0\u1eddng d\u00e0i<\/strong> v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u th\u1ea5p.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u00ednh \u0111\u01a1n gi\u1ea3n:<\/strong> Vi\u1ec7c tri\u1ec3n khai QPSK \u00edt ph\u1ee9c t\u1ea1p h\u01a1n so v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf b\u1eadc cao, t\u1eeb \u0111\u00f3 t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u00e1ng tin c\u1eady v\u00e0 chi ph\u00ed hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a3 QPSK \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf \u0111\u00e2u? C\u00e1c \u1ee9ng d\u1ee5ng ch\u1ee7 ch\u1ed1t<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">QPSK kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m l\u00fd thuy\u1ebft; m\u00e0 c\u00f2n l\u00e0 \u201cc\u00f4ng nh\u00e2n\u201d c\u1ed1t l\u00f5i trong v\u00f4 s\u1ed1 c\u00f4ng ngh\u1ec7 th\u1ef1c t\u1ebf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Vi\u1ec5n th\u00f4ng v\u1ec7 tinh:<\/strong> Truy\u1ec1n d\u1eef li\u1ec7u xu\u1ed1ng t\u1eeb v\u1ec7 tinh (v\u00ed d\u1ee5: t\u00edn hi\u1ec7u GPS, truy\u1ec1n h\u00ecnh v\u1ec7 tinh nh\u01b0 DVB-S2) th\u01b0\u1eddng s\u1eed d\u1ee5ng QPSK nh\u1edd kh\u1ea3 n\u0103ng kh\u00e1ng nhi\u1ec5u v\u01b0\u1ee3t tr\u1ed9i tr\u00ean nh\u1eefng kho\u1ea3ng c\u00e1ch kh\u1ed5ng l\u1ed3.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>M\u1ea1ng kh\u00f4ng d\u00e2y:<\/strong> \u0110\u00e2y l\u00e0 s\u01a1 \u0111\u1ed3 n\u1ec1n t\u1ea3ng trong c\u00e1c chu\u1ea9n Wi-Fi (802.11) v\u00e0 m\u1ea1ng di \u0111\u1ed9ng (CDMA, LTE, v\u00e0 hi\u1ec7n t\u1ea1i l\u00e0 5G cho c\u00e1c k\u00eanh \u0111i\u1ec1u khi\u1ec3n).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>H\u1ec7 th\u1ed1ng s\u1ee3i quang:<\/strong> Trong truy\u1ec1n th\u00f4ng quang \u0111\u1ed3ng pha, c\u00e1c bi\u1ebfn th\u1ec3 nh\u01b0 <strong>DP-QPSK (QPSK ph\u00e2n c\u1ef1c k\u00e9p)<\/strong> l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a c\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\"><strong>b\u1ed9 thu ph\u00e1t quang 100G+<\/strong><\/a>, hi\u1ec7n \u0111\u1ea1i, cho ph\u00e9p th\u00f4ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 tr\u00ean to\u00e0n c\u1ea7u.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i \u0111\u1ebfn quang h\u1ecdc hi\u1ec7u su\u1ea5t cao, vi\u1ec7c \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1i \u01b0u v\u1edbi t\u00edn hi\u1ec7u \u0111i\u1ec1u ch\u1ebf QPSK \u0111\u00f2i h\u1ecfi ph\u1ea7n c\u1ee9ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u00ednh x\u00e1c. \u0110\u00e2y l\u00e0 l\u00fac c\u00e1c <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> module quang h\u1ecdc ch\u1ea5t l\u01b0\u1ee3ng cao <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\"><strong>LS-SM3125-10C<br><\/strong><\/a> nh\u01b0, <strong>\u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t xu\u1ea5t s\u1eafc cho c\u00e1c li\u00ean k\u1ebft<\/strong> s\u1ee3i quang d\u1ef1a tr\u00ean QPSK.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>t\u1ea7m xa, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u v\u00e0 t\u1ef7 l\u1ec7 l\u1ed7i bit t\u1ed1i thi\u1ec3u.<\/strong><\/h2>\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>\u0110i\u1ec1u ch\u1ebf<\/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 su\u1ea5t ph\u1ed5<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 b\u1ec1n<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>BPSK<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>R\u1ea5t cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u27a3 So s\u00e1nh QPSK v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf kh\u00e1c<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>QPSK<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2<\/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><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n th\u00f4ng s\u00e2u trong kh\u00f4ng gian, li\u00ean k\u1ebft b\u1ec1n b\u1ec9, <strong>V\u1ec7 tinh, Wi-Fi,<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>16-QAM<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4<\/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><td colspan=\"1\" rowspan=\"1\"><p>v\u1eadn chuy\u1ec3n quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>64-QAM<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>6<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>R\u1ea5t cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>5G, Wi-Fi, modem c\u00e1p<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Wi-Fi t\u1ed1c \u0111\u1ed9 cao, 5G trong \u0111i\u1ec1u ki\u1ec7n t\u1ed1t<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u27a3 T\u1ed1i \u01b0u h\u00f3a m\u1ea1ng c\u1ee7a b\u1ea1n b\u1eb1ng c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p <strong>QPSK<\/strong> Hi\u1ec3u r\u00f5 c\u00e1c s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf nh\u01b0 <strong>l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean. Tri\u1ec3n khai ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0 b\u01b0\u1edbc ti\u1ebfp theo. D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf li\u00ean k\u1ebft v\u1ec7 tinh hay n\u00e2ng c\u1ea5p h\u1ea1 t\u1ea7ng<\/strong>, DWDM <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> c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u, vi\u1ec7c l\u1ef1a ch\u1ecdn linh ki\u1ec7n l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh. C\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">module quang h\u1ecdc hi\u1ec7u su\u1ea5t cao. <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/page\/aboutus.htm\"><strong>LINK-PP<\/strong><\/a> l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf v\u00e0 gi\u1ea3i \u0111i\u1ec1u ch\u1ebf c\u00e1c t\u00edn hi\u1ec7u n\u00e0y m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. <strong>\u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n y\u00eau c\u1ea7u ch\u1ea5t l\u01b0\u1ee3ng tuy\u1ec7t \u0111\u1ed1i v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt chuy\u00ean s\u00e2u, vi\u1ec7c h\u1ee3p t\u00e1c v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t uy t\u00edn l\u00e0 ch\u00eca kh\u00f3a.<\/strong> chuy\u00ean v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p quang h\u1ecdc ti\u00ean ti\u1ebfn, bao g\u1ed3m lo\u1ea1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a3 C\u00c2U H\u1eceI TH\u01af\u1edcNG G\u1eb6P<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >module quang h\u1ecdc CFP2 \u0111\u1ed3ng pha<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u0111\u1ecbnh d\u1ea1ng \u0111i\u1ec1u ch\u1ebf ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >QPSK l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">QPSK l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u0110i\u1ec1u ch\u1ebf D\u1ecbch pha Vu\u00f4ng g\u00f3c. B\u1ea1n s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u s\u1ed1 b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i pha c\u1ee7a t\u00edn hi\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec l\u00e0m QPSK kh\u00e1c bi\u1ec7t so v\u1edbi BPSK?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n t\u00ecm th\u1ea5y QPSK trong \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi v\u00e0 v\u1ec7 tinh. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y s\u1eed d\u1ee5ng QPSK \u0111\u1ec3 g\u1eedi d\u1eef li\u1ec7u nhanh ch\u00f3ng v\u00e0 r\u00f5 r\u00e0ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu c\u00f3 nhi\u1ec5u trong t\u00edn hi\u1ec7u QPSK?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p l\u1ed7i n\u1ebfu nhi\u1ec5u l\u00e0m thay \u0111\u1ed5i pha c\u1ee7a t\u00edn hi\u1ec7u. QPSK gi\u00fap b\u1ea1n gi\u1eef cho t\u00edn hi\u1ec7u lu\u00f4n r\u00f5 r\u00e0ng v\u00ec c\u00e1c tr\u1ea1ng th\u00e1i pha d\u1ec5 ph\u00e2n bi\u1ec7t v\u1edbi nhau.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110i\u1ec1u ch\u1ebf QPSK truy\u1ec1n hai bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u, n\u00e2ng cao t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u v\u00e0 \u0111\u1ed9 tin c\u1eady trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y, v\u1ec7 tinh v\u00e0 s\u1ed1.<\/p>","protected":false},"author":1,"featured_media":5083,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-5085","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5085","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=5085"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5085\/revisions"}],"predecessor-version":[{"id":11140,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5085\/revisions\/11140"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5083"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}