{"id":2561,"date":"2024-05-24T02:15:24","date_gmt":"2024-05-24T02:15:24","guid":{"rendered":"https:\/\/nfc-readers.com\/?p=2561"},"modified":"2024-05-24T02:15:24","modified_gmt":"2024-05-24T02:15:24","slug":"nfc-signal-processing-non-return-to-zero-encoding","status":"publish","type":"post","link":"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/","title":{"rendered":"NFC-signalbehandling: Non-Return-to-Zero-kodning"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_73 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inneh\u00e5llsf\u00f6rteckning<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"V\u00e4xla inneh\u00e5llsf\u00f6rteckning\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">V\u00e4xla<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#Overview_of_NFC_Data_Transmission\" title=\"\u00d6versikt \u00f6ver NFC-data\u00f6verf\u00f6ring\">\u00d6versikt \u00f6ver NFC-data\u00f6verf\u00f6ring<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#Standards_Communication_Protocols_in_NFC\" title=\"Standarder och kommunikationsprotokoll i NFC\">Standarder och kommunikationsprotokoll i NFC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#NFC_Non-Return-to-Zero_Level_NRZ-L_Encoding\" title=\"NFC Non-Return-to-Zero Level (NRZ-L)-kodning\">NFC Non-Return-to-Zero Level (NRZ-L)-kodning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#NFC_Manchester_Encoding\" title=\"NFC Manchester-kodning\">NFC Manchester-kodning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#NFC_Modified_Miller_Encoding\" title=\"NFC modifierad Miller-kodning\">NFC modifierad Miller-kodning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#Types_of_Modulation_in_NFC\" title=\"Typer av modulering i NFC\">Typer av modulering i NFC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nfc-readers.com\/sv\/nfc-signal-processing-non-return-to-zero-encoding\/#In_Summary\" title=\"Sammanfattningsvis\">Sammanfattningsvis<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"Overview_of_NFC_Data_Transmission\"><\/span><strong>\u00d6versikt \u00f6ver NFC-data\u00f6verf\u00f6ring<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><br class=\"container_a4d0b wrapper_d536d undefined\" \/><a href=\"https:\/\/nfc-readers.com\/sv\/Wholesale\/rfid-nfc-reader\/\">NFC<\/a>, en l\u00e5g datahastighet och tr\u00e5dl\u00f6s kommunikationsteknik med kort r\u00e4ckvidd, fungerar genom en synergi av tv\u00e5 enheter \u2013 kallad initiator och m\u00e5l. Dessa enheter, allm\u00e4nt erk\u00e4nda som taggen och l\u00e4saren, deltar i datautbyte via en RF-b\u00e4rv\u00e5gsfrekvens p\u00e5 13,56 MHz, beroende p\u00e5 kontaktl\u00f6s elektromagnetisk induktion. Den erforderliga n\u00e4rheten f\u00f6r s\u00e5dana interaktioner \u00e4r vanligtvis mindre \u00e4n 10 cm.<\/div>\n<p>&nbsp;<\/p>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"Standards_Communication_Protocols_in_NFC\"><\/span><strong>Standarder och kommunikationsprotokoll i NFC<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><br class=\"container_a4d0b wrapper_d536d undefined\" \/>Baserat p\u00e5 varierande datahastigheter, tillsammans med distinkta modulerings- och kodningskrav, manifesteras NFC-tekniken genom tre huvudstandarder: NFC-A, NFC-B och NFC-F. Dessa standarder \u00e4r associerade med olika modulerings- och kodningstyper, som illustreras i Tabell-1.<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-2562\" src=\"https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11-300x125.png\" alt=\"\" width=\"564\" height=\"235\" srcset=\"https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11-300x125.png 300w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11-1024x427.png 1024w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11-768x320.png 768w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11-18x8.png 18w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11-600x250.png 600w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NFC-NRZ-L-Coding11.png 1275w\" sizes=\"auto, (max-width: 564px) 100vw, 564px\" \/><\/p>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"NFC_Non-Return-to-Zero_Level_NRZ-L_Encoding\"><\/span><strong>NFC Non-Return-to-Zero Level (NRZ-L)-kodning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"image-wrapper_dd1b3 clickable_dd1b3\" data-testid=\"mdbox_image\"><img decoding=\"async\" src=\"data:;base64,<svg xmlns='http:\/\/www.w3.org\/2000\/svg' version='1.1' width='400' height='256'\/>&#8221; alt=&#8221;&#8221; aria-hidden=&#8221;true&#8221; \/><img loading=\"lazy\" class=\"alignnone  wp-image-2563\" alt=\"\" width=\"559\" height=\"311\" srcset=\"https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NRZ-L-coding-300x167.webp 300w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NRZ-L-coding-18x10.webp 18w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/NRZ-L-coding.webp 596w\" sizes=\"auto, (max-width: 559px) 100vw, 559px\" \/><\/div>\n<p>&nbsp;<\/p>\n<ul class=\"auto-hide-last-sibling-br\">\n<li><em>Representation<\/em>: NRZ-L-kodningsschemat avbildas i figur-1, d\u00e4r en bin\u00e4r &#039;1&#039; betecknas med en h\u00f6g sp\u00e4nning (+V), och en bin\u00e4r &#039;0&#039; betecknas med en l\u00e5g sp\u00e4nning (0 volt).<\/li>\n<li><em>Karakteristisk<\/em>: \u00c4ven kallad unipol\u00e4r NRZ-kodning, \u00e4r denna representation okomplicerad och markerar varje bitv\u00e4rde med en distinkt sp\u00e4nningsniv\u00e5.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"NFC_Manchester_Encoding\"><\/span><strong>NFC Manchester-kodning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"image-wrapper_dd1b3 clickable_dd1b3\" data-testid=\"mdbox_image\"><img decoding=\"async\" src=\"data:;base64,<svg xmlns='http:\/\/www.w3.org\/2000\/svg' version='1.1' width='400' height='256'\/>&#8221; alt=&#8221;&#8221; aria-hidden=&#8221;true&#8221; \/><\/div><p><img loading=\"lazy\" class=\"alignnone  wp-image-2564\" alt=\"\" width=\"520\" height=\"414\" srcset=\"https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Manchester-coding-300x239.webp 300w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Manchester-coding-15x12.webp 15w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Manchester-coding-600x478.webp 600w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Manchester-coding.webp 639w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/p>\n<ul class=\"auto-hide-last-sibling-br\">\n<li><em>Variation<\/em>: Det finns tv\u00e5 varianter av Manchester-koder - AC (bipol\u00e4r) och DC (unipol\u00e4r) typer.<\/li>\n<li><em>\u00d6verg\u00e5ngens betydelse<\/em>: B\u00e5de bin\u00e4r &#039;1&#039; och &#039;0&#039; k\u00e4nnetecknas av sp\u00e4nnings\u00f6verg\u00e5ngar inom samma bitperiod \u2013 h\u00f6g-till-l\u00e5g betecknar en bin\u00e4r &#039;1&#039;, medan l\u00e5g-till-h\u00f6g antyder en bin\u00e4r &#039;0&#039;.<\/li>\n<li><em>\u00d6verg\u00e5ngsprecision<\/em>: Dessa \u00f6verg\u00e5ngar \u00e4r noggrant placerade i mitten av bitperioden, vilket f\u00f6rst\u00e4rker datasignalernas tydlighet.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"NFC_Modified_Miller_Encoding\"><\/span><strong>NFC modifierad Miller-kodning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"image-wrapper_dd1b3 clickable_dd1b3\" data-testid=\"mdbox_image\"><img decoding=\"async\" src=\"data:;base64,<svg xmlns='http:\/\/www.w3.org\/2000\/svg' version='1.1' width='400' height='256'\/>&#8221; alt=&#8221;&#8221; aria-hidden=&#8221;true&#8221; \/><img loading=\"lazy\" class=\"alignnone  wp-image-2565\" alt=\"\" width=\"496\" height=\"276\" srcset=\"https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Modified-Miller-coding-300x167.webp 300w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Modified-Miller-coding-18x10.webp 18w, https:\/\/nfc-readers.com\/wp-content\/uploads\/2024\/05\/Modified-Miller-coding.webp 565w\" sizes=\"auto, (max-width: 496px) 100vw, 496px\" \/><\/div>\n<p>&nbsp;<\/p>\n<ul class=\"auto-hide-last-sibling-br\">\n<li><em>Bin\u00e4r &#039;1&#039;-mappning<\/em>: Bin\u00e4r logik &#039;1&#039; indikeras undantagsl\u00f6st av en \u00f6verg\u00e5ng fr\u00e5n h\u00f6g till l\u00e5g och sedan tillbaka till h\u00f6g inom bitperioden, oberoende av den f\u00f6reg\u00e5ende bitens tillst\u00e5nd.<\/li>\n<li><em>Bin\u00e4r &#039;0&#039;-mappning<\/em>: Skildringen av bin\u00e4r &#039;0&#039; \u00e4r beroende av f\u00f6reg\u00e5ende bits tillst\u00e5nd \u2013 om den f\u00f6reg\u00e5ende biten var en &#039;1&#039; f\u00f6ljer nuvarande nolla ett omv\u00e4nt \u00f6verg\u00e5ngsm\u00f6nster, och om det var en &#039;0&#039; ekar mappningen det f\u00f6r en bin\u00e4r &#039;1&#039;.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"Types_of_Modulation_in_NFC\"><\/span><strong>Typer av modulering i NFC<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><br class=\"container_a4d0b wrapper_d536d undefined\" \/>NFC omfattar en rad olika moduleringstyper som Amplitude Shift Keying (ASK) i b\u00e5de 10%- och 100%-varianter och anv\u00e4nder belastningsmoduleringstekniker. Dessa moduleringsmetoder \u00e4r integrerade i precisionen och effektiviteten hos NFC-kommunikationsprotokoll.<\/div>\n<p>&nbsp;<\/p>\n<h2 class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><span class=\"ez-toc-section\" id=\"In_Summary\"><\/span><strong>Sammanfattningsvis<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"auto-hide-last-sibling-br paragraph_c9271 paragraph-element\"><br class=\"container_a4d0b wrapper_d536d undefined\" \/>NFC:s arkitektur bygger p\u00e5 sofistikerade modulerings- och kodningsprotokoll, d\u00e4r varje standard anv\u00e4nder unika mekanismer f\u00f6r att s\u00e4kerst\u00e4lla s\u00e4ker och effektiv kommunikation mellan enheter i n\u00e4rheten. Oavsett om det \u00e4r genom NRZ-L:s sp\u00e4nningsniv\u00e5er, Manchesters \u00f6verg\u00e5ngsbaserade bin\u00e4ra indikationer eller Modified Millers kontextberoende mappningar, visar NFC-teknologin anpassningsf\u00f6rm\u00e5ga till en m\u00e4ngd driftsmilj\u00f6er och behov.<\/div>","protected":false},"excerpt":{"rendered":"<p>\u00d6versikt \u00f6ver NFC-data\u00f6verf\u00f6ring NFC, en tr\u00e5dl\u00f6s kommunikationsteknik med l\u00e5g datahastighet och kort r\u00e4ckvidd, fungerar genom en synergi av tv\u00e5 enheter \u2013 kallad initiatorn och m\u00e5let. Dessa enheter, allm\u00e4nt erk\u00e4nda som taggen och l\u00e4saren, deltar i datautbyte via en RF-b\u00e4rv\u00e5gsfrekvens p\u00e5 13,56 MHz, beroende p\u00e5 kontaktl\u00f6s elektromagnetisk induktion. Den [\u2026]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2561","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/posts\/2561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/comments?post=2561"}],"version-history":[{"count":1,"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/posts\/2561\/revisions"}],"predecessor-version":[{"id":2566,"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/posts\/2561\/revisions\/2566"}],"wp:attachment":[{"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/media?parent=2561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/categories?post=2561"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nfc-readers.com\/sv\/wp-json\/wp\/v2\/tags?post=2561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}