{"id":5082,"date":"2025-09-12T00:00:00","date_gmt":"2025-09-12T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/bpsk-modulation-vs-qpsk-choosing-the-right-modulation-scheme\/"},"modified":"2026-06-22T07:20:28","modified_gmt":"2026-06-22T07:20:28","slug":"bpsk-modulation-vs-qpsk-choosing-the-right-modulation-scheme","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/bpsk-modulation-vs-qpsk-choosing-the-right-modulation-scheme","title":{"rendered":"BPSK so v\u1edbi QPSK: Gi\u1ea3i m\u00e3 c\u00e1c n\u1ec1n t\u1ea3ng \u0111i\u1ec1u ch\u1ebf s\u1ed1 m\u1ea1nh m\u1ebd"},"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\/85b6dce83b02426d9a7544746a0e5708.webp\" alt=\"BPSK Modulation vs QPSK Modulation Choosing the Right Scheme\" class=\"wp-image-5078\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/85b6dce83b02426d9a7544746a0e5708.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/85b6dce83b02426d9a7544746a0e5708-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/85b6dce83b02426d9a7544746a0e5708-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/85b6dce83b02426d9a7544746a0e5708-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/85b6dce83b02426d9a7544746a0e5708-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi r\u1ed9ng l\u1edbn, v\u00f4 h\u00ecnh c\u1ee7a vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u, m\u1ed7i bit th\u00f4ng tin\u2014m\u1ed7i email, lu\u1ed3ng video v\u00e0 trang web\u2014\u0111\u1ec1u di chuy\u1ec3n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u1ea9n th\u1eadn. Ph\u01b0\u01a1ng ph\u00e1p ghi d\u1eef li\u1ec7u s\u1ed1 n\u00e0y l\u00ean s\u00f3ng mang \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0<br> <strong>\u0111i\u1ec1u ch\u1ebf k\u1ef9 thu\u1eadt s\u1ed1<\/strong>, v\u00e0 \u0111\u00e2y l\u00e0 ng\u00f4n ng\u1eef c\u01a1 b\u1ea3n m\u00e0 c\u00e1c thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u0111\u1ec3 giao ti\u1ebfp. Trong s\u1ed1 c\u00e1c k\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ebf kh\u00e1c nhau, hai s\u01a1 \u0111\u1ed3 n\u1ec1n t\u1ea3ng n\u1ed5i b\u1eadt l\u00ean:<br> <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><strong> (\u0110i\u1ec1u ch\u1ebf d\u1ecbch pha nh\u1ecb ph\u00e2n)<br><\/strong> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-you-should-know-about-qpsk-modulation-basics-advantages\/\"><strong>QPSK<\/strong><\/a><strong> (\u0110i\u1ec1u ch\u1ebf d\u1ecbch pha vu\u00f4ng g\u00f3c)<br><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa BPSK v\u00e0 QPSK<br><\/strong> l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai l\u00e0m vi\u1ec7c trong l\u0129nh v\u1ef1c vi\u1ec5n th\u00f4ng, m\u1ea1ng m\u00e1y t\u00ednh ho\u1eb7c<br> <strong>k\u1ef9 thu\u1eadt RF<br><\/strong>. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd l\u00e0m r\u00f5 hai k\u1ef9 thu\u1eadt m\u1ea1nh m\u1ebd n\u00e0y, so s\u00e1nh \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a ch\u00fang, \u0111\u1ed3ng th\u1eddi gi\u1ea3i th\u00edch vai tr\u00f2 thi\u1ebft y\u1ebfu c\u1ee7a ch\u00fang trong c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/coherent-transceivers-high-speed-data-transmission-explained\/\"><strong>quang h\u1ecdc k\u1ebft h\u1ee3p<br><\/strong><\/a> v\u00e0 t\u1ed1c \u0111\u1ed9 cao<br> <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>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2694\ufe0f Key Takeaways<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>BPSK ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf nh\u1eefng n\u01a1i c\u00f3 nhi\u1ec1u nhi\u1ec5u. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng nhi\u1ec5u v\u00e0 ch\u1ec9 c\u1ea7n ph\u1ea7n c\u1ee9ng \u0111\u01a1n gi\u1ea3n.<br>.<\/p><\/li><li><p>QPSK g\u1eedi hai bit d\u1eef li\u1ec7u trong m\u1ed7i k\u00fd hi\u1ec7u. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u. N\u00f3 ph\u00f9 h\u1ee3p khi b\u0103ng th\u00f4ng h\u1ea1n ch\u1ebf.<br>.<\/p><\/li><li><p>Ch\u1ecdn BPSK n\u1ebfu b\u1ea1n mu\u1ed1n h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 d\u1ec5 thi\u1ebft l\u1eadp. S\u1eed d\u1ee5ng n\u00f3 khi t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t.<br>.<\/p><\/li><li><p>Ch\u1ecdn QPSK n\u1ebfu b\u1ea1n mu\u1ed1n truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n. N\u00f3 kh\u00f4ng ti\u00eau t\u1ed1n th\u00eam b\u0103ng th\u00f4ng.<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2694\ufe0f BPSK (\u0110i\u1ec1u ch\u1ebf d\u1ecbch pha nh\u1ecb ph\u00e2n) l\u00e0 g\u00ec? C\u1ed5ng v\u00e0o k\u1ef9 thu\u1eadt s\u1ed1<br><\/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\/786138220d90467c92ce766ba4edf173.webp\" alt=\"BPSK\" class=\"wp-image-5079\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/786138220d90467c92ce766ba4edf173.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/786138220d90467c92ce766ba4edf173-300x145.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/786138220d90467c92ce766ba4edf173-1024x495.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/786138220d90467c92ce766ba4edf173-768x371.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/786138220d90467c92ce766ba4edf173-18x9.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BPSK<\/strong> l\u00e0 d\u1ea1ng \u0111\u01a1n gi\u1ea3n nh\u1ea5t c\u1ee7a \u0111i\u1ec1u ch\u1ebf d\u1ecbch pha. N\u00f3 s\u1eed d\u1ee5ng hai tr\u1ea1ng th\u00e1i pha ri\u00eang bi\u1ec7t, c\u00e1ch nhau 180 \u0111\u1ed9, \u0111\u1ec3 bi\u1ec3u di\u1ec5n d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n.<br>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Pha 0\u00b0:<br><\/strong> Bi\u1ec3u th\u1ecb m\u1ed9t bit nh\u1ecb ph\u00e2n<br> <strong>0<\/strong><\/p><\/li><li><p style=\"margin: 0px;\"><strong>Pha 180\u00b0:<br><\/strong> Bi\u1ec3u th\u1ecb m\u1ed9t bit nh\u1ecb ph\u00e2n<br> <strong>1<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ebf b\u1ec1n b\u1ec9, t\u1ed1i gi\u1ea3n n\u00e0y c\u1ef1c k\u1ef3 kh\u00e1ng nhi\u1ec5u v\u00e0 suy hao t\u00edn hi\u1ec7u (m\u1ed9t \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed9 b\u1ec1n cao c\u1ee7a<br> <strong>s\u01a1 \u0111\u1ed3 ch\u00f2m sao<br><\/strong> ). Nh\u1edd t\u00ednh \u0111\u01a1n gi\u1ea3n, n\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c t\u00ecnh hu\u1ed1ng m\u00e0 \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u quan tr\u1ecdng h\u01a1n t\u1ed1c \u0111\u1ed9 tuy\u1ec7t \u0111\u1ed1i, v\u00ed d\u1ee5 nh\u01b0 trong truy\u1ec1n th\u00f4ng v\u0169 tr\u1ee5 s\u00e2u v\u00e0 m\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng<br> <strong>truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y<br><\/strong> .<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2694\ufe0f QPSK (\u0110i\u1ec1u ch\u1ebf d\u1ecbch pha vu\u00f4ng g\u00f3c) l\u00e0 g\u00ec? Nh\u00e2n \u0111\u00f4i \u0111\u01b0\u1eddng cao t\u1ed1c d\u1eef li\u1ec7u<br><\/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\/cd8124e36fd3454a8c27d1191a7eb586.webp\" alt=\"QPSK\" class=\"wp-image-5080\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd8124e36fd3454a8c27d1191a7eb586.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd8124e36fd3454a8c27d1191a7eb586-300x145.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd8124e36fd3454a8c27d1191a7eb586-1024x495.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd8124e36fd3454a8c27d1191a7eb586-768x371.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd8124e36fd3454a8c27d1191a7eb586-18x9.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>QPSK<\/strong> l\u00e0 phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p c\u1ee7a BPSK, gi\u00fap t\u0103ng g\u1ea5p \u0111\u00f4i<br> <strong>hi\u1ec7u su\u1ea5t ph\u1ed5<br><\/strong>. N\u00f3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ed1n tr\u1ea1ng th\u00e1i pha ri\u00eang bi\u1ec7t (45\u00b0, 135\u00b0, 225\u00b0 v\u00e0 315\u00b0) \u0111\u1ec3 bi\u1ec3u di\u1ec5n hai bit d\u1eef li\u1ec7u tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u, thay v\u00ec ch\u1ec9 m\u1ed9t bit.<br>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>00:<\/strong> Pha 45\u00b0<br><\/p><\/li><li><p style=\"margin: 0px;\"><strong>01:<\/strong> Pha 135\u00b0<br><\/p><\/li><li><p style=\"margin: 0px;\"><strong>11:<\/strong> Pha 225\u00b0<br><\/p><\/li><li><p style=\"margin: 0px;\"><strong>10:<\/strong> Pha 315\u00b0<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch truy\u1ec1n hai bit c\u00f9ng m\u1ed9t l\u00fac, QPSK hi\u1ec7u qu\u1ea3 nh\u00e2n \u0111\u00f4i t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u trong c\u00f9ng m\u1ed9t b\u0103ng th\u00f4ng v\u1edbi BPSK. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i nh\u01b0 vi\u1ec5n th\u00f4ng v\u1ec7 tinh, Wi-Fi v\u00e0 ph\u00e1t s\u00f3ng video k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2694\ufe0f So s\u00e1nh tr\u1ef1c ti\u1ebfp: Cu\u1ed9c \u0111\u1ed1i \u0111\u1ea7u gi\u1eefa BPSK v\u00e0 QPSK<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"562\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c2d7c510e86e4b9ebd1afad9762055ab.webp\" alt=\"BPSK vs QPSK\" class=\"wp-image-5081\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c2d7c510e86e4b9ebd1afad9762055ab.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c2d7c510e86e4b9ebd1afad9762055ab-300x141.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c2d7c510e86e4b9ebd1afad9762055ab-1024x480.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c2d7c510e86e4b9ebd1afad9762055ab-768x360.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c2d7c510e86e4b9ebd1afad9762055ab-18x8.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i c\u1ed1t l\u00f5i gi\u1eefa hai s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 m\u1ed9t b\u00e0i to\u00e1n k\u1ef9 thu\u1eadt kinh \u0111i\u1ec3n: <strong>\u0110\u1ed9 b\u1ec1n vs. Hi\u1ec7u qu\u1ea3<\/strong>.<\/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>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>BPSK (\u0110i\u1ec1u ch\u1ebf d\u1ecbch pha nh\u1ecb ph\u00e2n)<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>QPSK (\u0110i\u1ec1u ch\u1ebf d\u1ecbch pha vu\u00f4ng g\u00f3c)<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Bit tr\u00ean m\u1ed7i k\u00fd hi\u1ec7u<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>C\u00e1c d\u1ecbch pha<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2 (0\u00b0, 180\u00b0)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4 (45\u00b0, 135\u00b0, 225\u00b0, 315\u00b0)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lower<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao h\u01a1n (g\u1ea5p \u0111\u00f4i BPSK)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ed9 b\u1ec1n (t\u1ef7 l\u1ec7 l\u1ed7i bit \u2013 BER)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Cao h\u01a1n<\/strong> (Ch\u1ed1ng nhi\u1ec5u t\u1ed1t h\u01a1n)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p h\u01a1n (d\u1ec5 b\u1ecb nhi\u1ec5u h\u01a1n)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung b\u00ecnh<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Vi\u1ec5n th\u00f4ng kh\u00f4ng gian s\u00e2u, RFID, t\u00edn hi\u1ec7u d\u1eabn OFDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n h\u00ecnh v\u1ec7 tinh, Wi-Fi, CDMA, <strong>M\u1ea1ng 4G\/5G<\/strong><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec3m m\u1ea5u ch\u1ed1t: Ch\u1ecdn BPSK cho c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00f3 kh\u0103n, c\u00f3 y\u00eau c\u1ea7u cao v\u1ec1 \u0111\u1ed9 tin c\u1eady li\u00ean k\u1ebft \u2013 n\u01a1i li\u00ean k\u1ebft kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p th\u1ea5t b\u1ea1i. Ch\u1ecdn QPSK cho c\u00e1c h\u1ec7 th\u1ed1ng dung l\u01b0\u1ee3ng cao, n\u01a1i b\u0103ng th\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n v\u00e0 b\u1ea1n c\u1ea7n t\u1ed1i \u0111a h\u00f3a th\u00f4ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u.<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/snr-signal-to-noise-ratio-and-its-impact-on-signal-quality\/\"><strong>SNR<\/strong><\/a> \u2694\ufe0f K\u1ebft n\u1ed1i quang h\u1ecdc: BPSK, QPSK v\u00e0 quang h\u1ecdc \u0111\u1ed3ng pha.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Nguy\u00ean l\u00fd c\u1ee7a BPSK v\u00e0 QPSK kh\u00f4ng ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf v\u00f4 tuy\u1ebfn; ch\u00fang l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">truy\u1ec1n d\u1eabn quang \u0111\u1ed3ng pha hi\u1ec7n \u0111\u1ea1i <strong>Quang h\u1ecdc \u0111\u1ed3ng pha<\/strong>. <strong>s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ecbnh d\u1ea1ng \u0111i\u1ec1u ch\u1ebf n\u00e0y \u0111\u1ec3 truy\u1ec1n m\u1ed9t l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 qua c\u00e1p quang tr\u00ean nh\u1eefng kho\u1ea3ng c\u00e1ch \u0111\u00e1ng kinh ng\u1ea1c. <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/digital-signal-processor-functionality-in-optical-transceivers\/\"><strong>c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 (DSP) ti\u00ean ti\u1ebfn<\/strong><\/a> h\u1ec7 th\u1ed1ng,.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-dwdm-explaining-dense-wavelength-division-multiplexing\/\"><strong>\u0110a b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (DWDM)<\/strong><\/a> \u0110i\u1ec1u ch\u1ebf QPSK, <strong>l\u00e0 kh\u1ed1i x\u00e2y d\u1ef1ng c\u01a1 b\u1ea3n cho c\u00e1c b\u1ed9 thu ph\u00e1t \u0111\u1ed3ng pha 100G. C\u00e1c s\u01a1 \u0111\u1ed3 n\u00e2ng cao h\u01a1n nh\u01b0<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 cao h\u01a1n n\u1eefa b\u1eb1ng c\u00e1ch truy\u1ec1n hai t\u00edn hi\u1ec7u QPSK \u0111\u1ed9c l\u1eadp tr\u00ean hai ph\u00e2n c\u1ef1c vu\u00f4ng g\u00f3c c\u1ee7a \u00e1nh s\u00e1ng. <strong>DP-QPSK (QPSK ph\u00e2n c\u1ef1c k\u00e9p)<\/strong> \u0110\u00e2y l\u00e0 n\u01a1i ph\u1ea7n c\u1ee9ng hi\u1ec7u n\u0103ng cao l\u00e0 b\u1eaft bu\u1ed9c. V\u00ed d\u1ee5, module quang h\u1ecdc \u0111\u1ed3ng pha.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">100G CFP2-DCO <strong>t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 \u0111\u1ed3ng pha ti\u00ean ti\u1ebfn<\/strong> \u0111\u1ec3 mang l\u1ea1i hi\u1ec7u n\u0103ng xu\u1ea5t s\u1eafc v\u00e0 <strong>l\u00e0 kh\u1ed1i x\u00e2y d\u1ef1ng c\u01a1 b\u1ea3n cho c\u00e1c b\u1ed9 thu ph\u00e1t \u0111\u1ed3ng pha 100G. C\u00e1c s\u01a1 \u0111\u1ed3 n\u00e2ng cao h\u01a1n nh\u01b0<\/strong> cho m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i. Khi \u0111\u00e1nh gi\u00e1 <strong>ti\u00eau th\u1ee5 \u0111i\u1ec7n th\u1ea5p<\/strong> , vi\u1ec7c hi\u1ec3u r\u00f5 s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf n\u1ec1n t\u1ea3ng l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p cho <strong>quang h\u1ecdc<\/strong>, \u2694\ufe0f K\u1ebft lu\u1eadn: Ch\u1ecdn c\u00f4ng c\u1ee5 \u0111\u00fang cho c\u00f4ng vi\u1ec7c <strong>Hi\u1ec7u n\u0103ng c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i v\u1eadt l\u00fd b\u00ean trong v\u00e0 gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t, th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2694\ufe0f Conclusion: Choosing the Right Tool for the Job<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng c\u00f3 \u201cng\u01b0\u1eddi chi\u1ebfn th\u1eafng\u201d n\u00e0o trong cu\u1ed9c tranh lu\u1eadn gi\u1eefa BPSK v\u00e0 QPSK. M\u1ed7i s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho m\u1ed9t nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3. BPSK l\u00e0 con ng\u1ef1a l\u00e0m vi\u1ec7c b\u1ec1n b\u1ec9, \u0111\u00e1ng tin c\u1eady cho nh\u1eefng c\u00f4ng vi\u1ec7c kh\u00f3 kh\u0103n. QPSK l\u00e0 \u0111\u1ed9ng c\u01a1 hi\u1ec7u qu\u1ea3, dung l\u01b0\u1ee3ng cao, v\u1eadn h\u00e0nh th\u1ebf gi\u1edbi c\u1ee7a ch\u00fang ta\u2014m\u1ed9t th\u1ebf gi\u1edbi kh\u00e1t b\u0103ng th\u00f4ng. C\u00f9ng nhau, v\u00e0 trong c\u00e1c phi\u00ean b\u1ea3n ph\u00e1i sinh ph\u1ee9c t\u1ea1p h\u01a1n c\u1ee7a ch\u00fang (nh\u01b0 8-QAM, 16-QAM, v.v.), ch\u00fang t\u1ea1o th\u00e0nh x\u01b0\u01a1ng s\u1ed1ng v\u00f4 h\u00ecnh c\u1ee7a \u0111\u1eddi s\u1ed1ng k\u1ef9 thu\u1eadt s\u1ed1 k\u1ebft n\u1ed1i c\u1ee7a ch\u00fang ta.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi nhu c\u1ea7u v\u1ec1 d\u1eef li\u1ec7u b\u00f9ng n\u1ed5, vai tr\u00f2 c\u1ee7a \u0111i\u1ec1u ch\u1ebf tinh vi trong <strong>m\u1ea1ng quang<\/strong> ch\u1ec9 ng\u00e0y c\u00e0ng gia t\u0103ng. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ed1i t\u00e1c c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>S\u1eb5n s\u00e0ng t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng c\u1ee7a b\u1ea1n b\u1eb1ng c\u00f4ng ngh\u1ec7 \u0111i\u1ec1u ch\u1ebf ph\u00f9 h\u1ee3p?<\/strong> \ud83d\udd17<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1m ph\u00e1 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/page\/aboutus.htm\"><strong>LINK-PP<\/strong><\/a>\u2018<em>\u0111\u1ea7y \u0111\u1ee7<\/em> c\u00e1c module quang h\u1ecdc \u0111\u1ed3ng pha hi\u1ec7u su\u1ea5t cao, \u0111\u00e1ng tin c\u1eady c\u1ee7a <em>ch\u00fang t\u00f4i<\/em>, bao g\u1ed3m c\u1ea3 <strong>QPSK 200G<\/strong> and <strong>16-QAM 400G<\/strong> c\u00e1c phi\u00ean b\u1ea3n, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho c\u00e1c m\u1ea1ng y\u00eau c\u1ea7u kh\u1eaft khe nh\u1ea5t <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 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p>\n\n\n\n<div><div widgetid=\"ca8b7315766111f0be050a37e7beaac1\" format=\"embedded\" data-widget-id=\"ca8b7315766111f0be050a37e7beaac1\" data-mode=\"production.zh\" style=\"display: block;\"><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2694\ufe0f FAQ<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa BPSK v\u00e0 QPSK l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BPSK truy\u1ec1n m\u1ed9t bit v\u1edbi hai pha. QPSK truy\u1ec1n hai bit b\u1eb1ng b\u1ed1n pha. QPSK cho ph\u00e9p b\u1ea1n g\u1eedi nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n trong c\u00f9ng m\u1ed9t kh\u00f4ng gian.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u ch\u1ebf n\u00e0o t\u1ed1t h\u01a1n trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec5u?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BPSK t\u1ed1t h\u01a1n n\u1ebfu c\u00f3 nhi\u1ec1u nhi\u1ec5u. C\u00e1c k\u00fd hi\u1ec7u c\u1ee7a n\u00f3 c\u00e1ch xa nhau h\u01a1n, do \u0111\u00f3 b\u1ea1n d\u1ec5 ph\u00e2n bi\u1ec7t ch\u00fang h\u01a1n. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch khi c\u00f3 nhi\u1ec5u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Khi n\u00e0o t\u00f4i n\u00ean s\u1eed d\u1ee5ng QPSK thay v\u00ec BPSK?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng QPSK n\u1ebfu b\u1ea1n c\u1ea7n g\u1eedi nhi\u1ec1u d\u1eef li\u1ec7u. QPSK ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong c\u00e1c m\u1ea1ng kh\u00f4ng d\u00e2y t\u1ed1c \u0111\u1ed9 cao v\u00e0 truy\u1ec1n h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1. N\u00f3 s\u1eed d\u1ee5ng kh\u00f4ng gian k\u00eanh hi\u1ec7u qu\u1ea3 h\u01a1n BPSK.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >QPSK c\u00f3 y\u00eau c\u1ea7u ph\u1ea7n c\u1ee9ng ph\u1ee9c t\u1ea1p h\u01a1n BPSK kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3, QPSK c\u1ea7n ph\u1ea7n c\u1ee9ng \u0111\u1ec3 x\u1eed l\u00fd b\u1ed1n pha. Ph\u1ea7n c\u1ee9ng BPSK \u0111\u01a1n gi\u1ea3n h\u01a1n v\u00ec ch\u1ec9 s\u1eed d\u1ee5ng hai pha. B\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n thi\u1ebft b\u1ecb t\u1ed1t h\u01a1n cho QPSK.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00f4i c\u00f3 th\u1ec3 chuy\u1ec3n d\u1ec5 d\u00e0ng t\u1eeb BPSK sang QPSK kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n. B\u1ea1n c\u00f3 th\u1ec3 ph\u1ea3i n\u00e2ng c\u1ea5p b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu \u0111\u1ec3 h\u1ed7 tr\u1ee3 QPSK. H\u00e3y \u0111\u1ea3m b\u1ea3o ph\u1ea7n c\u1ee9ng c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ea3 hai chu\u1ea9n tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n thay \u0111\u1ed5i.<\/p>\n\n\n\n<script src=\"https:\/\/cdn.mylandingpages.co\/widgets\/platform\/platform.widget.js\" async=\"true\"><\/script>","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh \u0111i\u1ec1u ch\u1ebf BPSK v\u00e0 QPSK \u0111\u1ec3 l\u1ef1a ch\u1ecdn s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p cho kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u, t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u v\u00e0 hi\u1ec7u qu\u1ea3 b\u0103ng th\u00f4ng.<\/p>","protected":false},"author":1,"featured_media":5078,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-5082","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\/5082","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=5082"}],"version-history":[{"count":3,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5082\/revisions"}],"predecessor-version":[{"id":11139,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5082\/revisions\/11139"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5078"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}