{"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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/","title":{"rendered":"NFC signalo apdorojimas: negr\u012f\u017etama \u012f nul\u012f koduot\u0117"},"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\">Turinys<\/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=\"Perjungti Turinio lentel\u0119\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Perjungti<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#Overview_of_NFC_Data_Transmission\" title=\"NFC duomen\u0173 perdavimo ap\u017evalga\">NFC duomen\u0173 perdavimo ap\u017evalga<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#Standards_Communication_Protocols_in_NFC\" title=\"NFC standartai ir ry\u0161io protokolai\">NFC standartai ir ry\u0161io protokolai<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#NFC_Non-Return-to-Zero_Level_NRZ-L_Encoding\" title=\"NFC negr\u012f\u017etama iki nulio lygio (NRZ-L) koduot\u0117\">NFC negr\u012f\u017etama iki nulio lygio (NRZ-L) koduot\u0117<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#NFC_Manchester_Encoding\" title=\"NFC Man\u010desterio kodavimas\">NFC Man\u010desterio kodavimas<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#NFC_Modified_Miller_Encoding\" title=\"NFC modifikuotas Miller kodavimas\">NFC modifikuotas Miller kodavimas<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#Types_of_Modulation_in_NFC\" title=\"NFC moduliavimo tipai\">NFC moduliavimo tipai<\/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\/lt\/nfc-signal-processing-non-return-to-zero-encoding\/#In_Summary\" title=\"Apibendrinant\">Apibendrinant<\/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>NFC duomen\u0173 perdavimo ap\u017evalga<\/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\/lt\/Wholesale\/rfid-nfc-reader\/\">NFC<\/a>, ma\u017ea duomen\u0173 perdavimo sparta ir ma\u017eo nuotolio belaid\u017eio ry\u0161io technologija, veikia dviej\u0173 \u012frengini\u0173, vadinam\u0173 iniciatoriumi ir taikiniu, sinergija. Paprastai pripa\u017e\u012fstami kaip \u017eyma ir skaitytuvas, \u0161ie subjektai kei\u010diasi duomenimis per 13,56 MHz RF ne\u0161lio da\u017en\u012f, remdamiesi bekontakte elektromagnetine indukcija. Tokioms s\u0105veikoms reikalingas atstumas paprastai yra ma\u017eesnis nei 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>NFC standartai ir ry\u0161io protokolai<\/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\" \/>Remiantis skirtingu duomen\u0173 perdavimo grei\u010diu, taip pat skirtingais moduliavimo ir kodavimo reikalavimais, NFC technologija pasirei\u0161kia trimis pagrindiniais standartais: NFC-A, NFC-B ir NFC-F. \u0160ie standartai yra susieti su skirtingais moduliavimo ir kodavimo tipais, kaip parodyta 1 lentel\u0117je.<\/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 negr\u012f\u017etama iki nulio lygio (NRZ-L) koduot\u0117<\/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>Atstovavimas<\/em>: NRZ-L kodavimo schema pavaizduota 1 paveiksle, kur dvejetainis \u201e1\u201c \u017eymimas auk\u0161ta \u012ftampa (+V), o dvejetainis \u201e0\u201c \u2013 \u017eema \u012ftampa (0 volt\u0173).<\/li>\n<li><em>B\u016bdingas<\/em>: Taip pat vadinamas vienpoliu NRZ kodavimu, \u0161is vaizdavimas yra paprastas, pa\u017eymint kiekvien\u0105 bito reik\u0161m\u0119 skirtingu \u012ftampos lygiu.<\/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 Man\u010desterio kodavimas<\/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>Variacija<\/em>: Yra du Man\u010desterio kod\u0173 variantai \u2013 AC (dvipolis) ir DC (vienpolis) tipai.<\/li>\n<li><em>Per\u0117jimo reik\u0161m\u0117<\/em>: tiek dvejetainiams \u201e1\u201c, tiek \u201e0\u201c b\u016bdingi \u012ftampos per\u0117jimai per t\u0105 pat\u012f bit\u0173 period\u0105 \u2013 \u201eHigh to Low\u201c rei\u0161kia dvejetain\u012f \u201e1\u201c, o nuo \u017eemo iki auk\u0161to rei\u0161kia dvejetain\u012f \u201e0\u201c.<\/li>\n<li><em>Per\u0117jimo tikslumas<\/em>: \u0160ie per\u0117jimai yra kruop\u0161\u010diai i\u0161d\u0117styti bit\u0173 periodo viduryje, o tai sustiprina duomen\u0173 signal\u0173 ai\u0161kum\u0105.<\/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 modifikuotas Miller kodavimas<\/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>Dvejetainis \u201e1\u201c atvaizdavimas<\/em>: Dvejetain\u0117 logika \u201e1\u201c visada rodoma per\u0117jimu i\u0161 auk\u0161to \u012f \u017eem\u0105 ir atgal \u012f auk\u0161t\u0105 per bit\u0173 laikotarp\u012f, neatsi\u017evelgiant \u012f ankstesnio bito b\u016bsen\u0105.<\/li>\n<li><em>Dvejetainis \u201e0\u201c atvaizdavimas<\/em>: dvejetainio \u201e0\u201c atvaizdavimas priklauso nuo ankstesnio bito s\u0105lygos \u2013 jei ankstesnis bitas buvo \u201e1\u201c, dabartinis nulis seka atvirk\u0161tinio per\u0117jimo \u0161ablon\u0105, o jei jis buvo \u201e0\u201c, atvaizdavimas atkartoja dvejetainio bito atvaizdavim\u0105. &#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>NFC moduliavimo tipai<\/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 apima \u012fvairius moduliavimo tipus, pvz., amplitud\u0117s poslinkio klavi\u0161\u0105 (ASK) ir 10%, ir 100% variantuose, ir naudoja apkrovos moduliavimo metodus. \u0160ie moduliavimo metodai yra neatsiejami nuo NFC ry\u0161io protokol\u0173 tikslumo ir efektyvumo.<\/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>Apibendrinant<\/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 architekt\u016bra pagr\u012fsta sud\u0117tingais moduliavimo ir kodavimo protokolais, o kiekviename standarte naudojami unikal\u016bs mechanizmai, u\u017etikrinantys saug\u0173 ir veiksming\u0105 ry\u0161\u012f tarp artim\u0173 \u012frengini\u0173. Nesvarbu, ar naudojant NRZ-L \u012ftampos lygius, Man\u010desterio per\u0117jimu pagr\u012fstas dvejetaines indikacijas, ar modifikuot\u0105 Millerio nuo konteksto priklausom\u0105 atvaizdavim\u0105, NFC technologija parodo geb\u0117jim\u0105 prisitaikyti prie daugyb\u0117s veiklos aplink\u0173 ir poreiki\u0173.<\/div>","protected":false},"excerpt":{"rendered":"<p>NFC duomen\u0173 perdavimo ap\u017evalga NFC, ma\u017eo duomen\u0173 perdavimo spartos ir trumpo nuotolio belaid\u017eio ry\u0161io technologija, veikia dviej\u0173 \u012frengini\u0173, vadinam\u0173 iniciatoriumi ir taikiniu, sinergija. Paprastai pripa\u017e\u012fstami kaip \u017eyma ir skaitytuvas, \u0161ie subjektai kei\u010diasi duomenimis per 13,56 MHz RF ne\u0161lio da\u017en\u012f, remdamiesi bekontakte elektromagnetine indukcija. [\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\/lt\/wp-json\/wp\/v2\/posts\/2561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/comments?post=2561"}],"version-history":[{"count":1,"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/posts\/2561\/revisions"}],"predecessor-version":[{"id":2566,"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/posts\/2561\/revisions\/2566"}],"wp:attachment":[{"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/media?parent=2561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/categories?post=2561"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nfc-readers.com\/lt\/wp-json\/wp\/v2\/tags?post=2561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}