{"id":29408,"date":"2013-05-31T14:58:45","date_gmt":"2013-05-31T09:28:45","guid":{"rendered":"http:\/\/www.kopykitab.com\/blog\/?p=29408"},"modified":"2013-06-03T10:20:12","modified_gmt":"2013-06-03T04:50:12","slug":"wideband-code-division-multiple-access-wcdma","status":"publish","type":"post","link":"https:\/\/www.kopykitab.com\/blog\/wideband-code-division-multiple-access-wcdma\/","title":{"rendered":"Wideband Code Division Multiple Access Notes (WCDMA)"},"content":{"rendered":"<h1 style=\"text-align: center;\">Wideband Code Division Multiple Access Notes (WCDMA)<\/h1>\n<div>\n<div><\/div>\n<div>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_47_1 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\">Table of Contents<\/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=\"ez-toc-toggle-icon-1\"><label for=\"item-69ea1b2725ff6\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #000000;color:#000000\" 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: #000000;color:#000000\" 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><\/label><input  type=\"checkbox\" id=\"item-69ea1b2725ff6\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.kopykitab.com\/blog\/wideband-code-division-multiple-access-wcdma\/#definition-%e2%80%93-what-does-wideband-code-division-multiple-access\" title=\"Definition &#8211; What does\u00a0Wideband Code Division Multiple Access\">Definition &#8211; What does\u00a0Wideband Code Division Multiple Access<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kopykitab.com\/blog\/wideband-code-division-multiple-access-wcdma\/#wcdmamean\" title=\"(WCDMA)mean?\">(WCDMA)mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kopykitab.com\/blog\/wideband-code-division-multiple-access-wcdma\/#techopedia-explains-wideband-code-division-multiple-access-wcdma\" title=\"Techopedia explains\u00a0Wideband Code Division Multiple Access (WCDMA)\">Techopedia explains\u00a0Wideband Code Division Multiple Access (WCDMA)<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"definition-%e2%80%93-what-does-wideband-code-division-multiple-access\"><\/span>Definition &#8211; What does\u00a0Wideband Code Division Multiple Access<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"wcdmamean\"><\/span>(WCDMA)mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Wideband Code Division Multiple Access (WCDMA) is a third-generation (3G) standard that employs the direct-sequence code division multiple access (DS-CDMA) channel access method and the frequency-division duplexing (FDD) method to provide high-speed and high-capacity service. WCDMA is the most commonly used variant of the Universal Mobile Telecommunications System (UMTS). It was developed by Japan\u2019s NTT DoCoMo and formed the basis of its Freedom of Multimedia Access (FOMA) 3G Network.<\/p>\n<\/div>\n<\/div>\n<div>\n<div><\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"techopedia-explains-wideband-code-division-multiple-access-wcdma\"><\/span>Techopedia explains\u00a0Wideband Code Division Multiple Access (WCDMA)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The WCDMA system is part of the UMTS. It is developed by the 3G Partnership Program, which is composed of evolved core cellular networks that belong to the Global System for Mobile (GSM) communications networks worldwide.<\/p>\n<p>WCDMA features two modes:<\/p>\n<ul>\n<li>Frequency Division Duplex (FDD): Separates users by employing both codes as well as frequencies. One frequency is used for the uplink, while another is used for the downlink.<\/li>\n<li>Time Division Duplex (TDD): Separates users by employing codes, frequencies and time, wherein the same frequency is used for both uplink and downlink.<\/li>\n<\/ul>\n<p>Although WCDMA is designed to operate on evolved GSM core networks, it uses code division multiple access (CDMA) for its air interface. In fact, the majority of the 3G systems in operation employ CDMA, while the rest use time division multiple access (TDMA). The TDD mode of WCDMA actually employs a combination of TDMA and CDMA.<\/p>\n<p>CDMA allows multiple users to share a channel at the same time, while TDMA allows users to share the same channel by chopping it into different time slots. CDMA offers the benefits of multipath diversity and soft handoffs.<\/p>\n<p>As an air interface technology, WCDMA is able to artificially increase a signal&#8217;s bandwidth. It does so by modulating each baseband symbol with a binary or quaternary signature with a much higher rate than that of the original data symbol.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Wideband Code Division Multiple Access Notes (WCDMA) Definition &#8211; What does\u00a0Wideband Code Division Multiple Access (WCDMA)mean? Wideband Code Division Multiple Access (WCDMA) is a third-generation (3G) standard that employs the direct-sequence code division multiple access (DS-CDMA) channel access method and the frequency-division duplexing (FDD) method to provide high-speed and high-capacity service. WCDMA is the most &#8230; <a title=\"Wideband Code Division Multiple Access Notes (WCDMA)\" class=\"read-more\" href=\"https:\/\/www.kopykitab.com\/blog\/wideband-code-division-multiple-access-wcdma\/\" aria-label=\"More on Wideband Code Division Multiple Access Notes (WCDMA)\">Read more<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":""},"categories":[4773],"tags":[2864],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/29408"}],"collection":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/comments?post=29408"}],"version-history":[{"count":0,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/29408\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/media?parent=29408"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/categories?post=29408"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/tags?post=29408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}