{"id":684,"date":"2014-11-24T09:08:55","date_gmt":"2014-11-24T06:08:55","guid":{"rendered":""},"modified":"2014-11-24T09:08:55","modified_gmt":"2014-11-24T06:08:55","slug":"","status":"publish","type":"post","link":"https:\/\/kecbu.uobaghdad.edu.iq\/?p=684","title":{"rendered":"\u062a\u062f\u0631\u064a\u0633\u064a \u0641\u064a \u0643\u0644\u064a\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u062e\u0648\u0627\u0631\u0632\u0645\u064a \u064a\u0646\u0634\u0631 \u0628\u062d\u062b\u064a\u0646 \u0641\u064a \u0645\u0624\u062a\u0645\u0631\u064a\u0646 \u0639\u0644\u0645\u064a\u064a\u0646"},"content":{"rendered":"<div style=\"text-align: justify;\"><span style=\"font-size: 18px; color: #c00000;\"><strong><span style=\"font-size: 20px;\"><span style=\"font-size: 20px;\">\u062a\u062f\u0631\u064a\u0633\u064a \u0641\u064a \u0643\u0644\u064a\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u062e\u0648\u0627\u0631\u0632\u0645\u064a \u064a\u0646\u0634\u0631 \u0628\u062d\u062b\u0627\u0646 \u0641\u064a \u0645\u0624\u062a\u0645\u0631\u064a\u0646 \u0639\u0644\u0645\u064a\u064a\u0646<\/span><br \/> <\/span><\/strong>&nbsp;&nbsp; <\/span><span style=\"font-size: 20px;\"><strong><br \/> \u0646\u0634\u0631 \u0627\u0644\u062a\u062f\u0631\u064a\u0633\u064a&nbsp; \u0641\u064a \u0643\u0644\u064a\u062a\u0646\u0627 \u0645.\u0645. \u0639\u0644\u064a \u062d\u064a\u062f\u0631 \u0645\u0647\u062f\u064a \/&nbsp; \u0642\u0633\u0645 \u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0648\u0627\u0644\u0627\u062a\u0635\u0627\u0644\u0627\u062a\u060c \u0648\u0637\u0627\u0644\u0628 \u0627\u0644\u062f\u0643\u062a\u0648\u0631\u0627\u0647 \u0641\u064a \u062c\u0627\u0645\u0639\u0629 <span style=\"font-family: Georgia;\">Ilmenau<\/span> <span style=\"font-size: 20px;\"><strong>\u0627\u0644\u0627\u0644\u0645\u0627\u0646\u064a\u0629&nbsp;<\/strong><\/span>\u0628\u062d\u062b\u064a\u0646 \u0641\u064a \u0645\u0624\u062a\u0645\u0631\u064a\u0646 \u0639\u0644\u0645\u064a\u064a\u0646:<br \/> <span style=\"text-decoration: underline; color: #c00000;\">\u0627\u0644\u0628\u062d\u062b \u0627\u0644\u0627\u0648\u0644<\/span> (<span style=\"font-size: 14px; color: #c00000;\"><a href=\"http:\/\/ieeexplore.ieee.org\/xpl\/login.jsp?tp=&amp;arnumber=6934886&amp;url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6934886\"><span style=\"font-size: 14px;\">Self-Organized Cognitive Engine Based on Q-Learning<\/span><\/a><\/span>) , <br \/> <\/strong><strong><span style=\"font-size: 20px; color: #000000;\"><strong><span style=\"font-size: 20px; text-align: justify;\">\u0641\u064a \u0645\u0624\u062a\u0645\u0631<\/span><\/strong><\/span><span style=\"color: #c00000;\">(<\/span><span style=\"font-size: 20px;\"><strong><span style=\"font-size: 20px; color: #c00000;\"><strong><span style=\"font-size: 20px; color: #c00000;\"><strong><span style=\"font-size: 20px; color: #c00000;\">(<span style=\"font-size: 20px; color: #c00000;\"><strong><span style=\"font-size: 20px; color: #c00000;\"> IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE,2014 )) <span style=\"font-size: 20px; color: #000000;\"><span style=\"font-size: 20px; color: #000000;\"> \u0648\u062a\u0645 \u0646\u0634\u0631 \u0647\u0630\u0627 \u0627\u0644\u0628\u062d\u062b \u0639\u0644\u0649 \u0645\u0648\u0642\u0639<\/span> (<span style=\"color: #c00000;\">IEEE<\/span>)<\/p>\n<p> <img decoding=\"async\" alt=\"\" src=\"https:\/\/kecbu.uobaghdad.edu.iq\/wp-content\/uploads\/sites\/29\/uploads\/gallery\/%D8%A8%D8%AD%D9%88%D8%AB%20%D8%A7%D8%B3%D8%AA%D8%A7%D8%B0%20%D8%B9%D9%84%D9%8A%20%D8%AD%D9%8A%D8%AF%D8%B1\/%D8%B9%D9%84%D9%8A%20%D8%AD%D9%8A%D8%AF%D8%B1%202.jpg\" style=\"width: 600px;\" \/><br \/> &nbsp;<\/span><\/span><\/strong><\/span><\/span><\/strong><\/span><\/strong><\/span><\/strong><\/span><\/strong>, \u0648\u0627\u0644\u0630\u064a \u064a\u062f\u0648\u0631 \u062d\u0648\u0644 <strong>:<br \/> <span style=\"text-decoration: underline; font-family: Calibri; color: #c00000;\">Abstract<\/span><\/strong><strong><span style=\"font-family: Calibri;\"><br \/> The ever-increasing need for higher data rates in multimedia services and applications leads to stringent requirements on the bit <\/span><span style=\"font-family: Calibri;\">rate\/km2 that next-generation cellular wireless networks are expected to deliver. This increasing trend has urged mobile operators to examine new ways for improving their coverage and boosting their network capacities. A promising approach to this challenge is the dense deployment of short range, low-power and low-cost base stations or access points in conjunction with the macrocellular network, as well as relays, distributed antennas and radio remote heads. However, the Capital and Operating Expenditures (CAPEX and OPEX) of such heterogeneous networks increase with the increasing number of nodes.<br \/> The solution to this problem is the deployment of Self-Organizing Networks (SONETs). SONETs represent a novel paradigm based on the deployment of networks with self-organized functionalists. There are significant technical problems that need to be addressed for the successful deployment and operation of SONETs. In particular, time-, frequency- and spatial-domain interference management is a fundamental issue. To deal with increasing peak data demands, SONETs design should be self organized based on interference\/load\/congestion levels, dynamically adapting their transmissions and using smart traffic offloading strategies onto licensed\/unlicensed bands. The IEEE International Workshop on Self-Organizing Networks (SONETs) offers an excellent opportunity for academic and industrial researchers to spread and share the latest results and understandings for rendering wireless networks more efficient in terms of capacity, coverage, Quality-of-Service performance and energy consumption.<br \/> <\/span><br \/> <span style=\"text-decoration: underline; color: #c00000;\">\u0648\u0627\u0644\u0628\u062d\u062b \u0627\u0644\u062b\u0627\u0646\u064a<\/span> (<span style=\"font-size: 22px; color: #c00000;\"><a href=\"http:\/\/ieeexplore.ieee.org\/xpl\/login.jsp?tp=&amp;arnumber=6906383&amp;url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6906383\"><span style=\"font-size: 14px;\">Improving Cognitive Radio Link Adaptation for Avoiding Interference with Passive Primary Users<\/span><\/a><\/span>) ,<br \/> &nbsp;\u0641\u064a \u0645\u0624\u062a\u0645\u0631 ((<span style=\"color: #c00000;\">10th international Wireless Communications &amp; Mobile Computing Conference,2014<\/span>)) \u0648\u062a\u0645 \u0646\u0634\u0631\u0647 \u0627\u064a\u0636\u0627 \u0639\u0644\u0649 \u0645\u0648\u0642\u0639 \u0645\u062c\u0644\u0629 (IEEE) <br \/> <span style=\"font-size: 20px;\"><strong><span style=\"font-size: 20px;\"><strong><span style=\"font-size: 20px; color: #c00000;\"><strong><span style=\"font-size: 20px; color: #c00000;\"><strong><span style=\"font-size: 20px; color: #c00000;\"><strong><span style=\"font-size: 20px; color: #000000;\"><img decoding=\"async\" alt=\"\" src=\"https:\/\/kecbu.uobaghdad.edu.iq\/uploads\/gallery\/%D8%A8%D8%AD%D9%88%D8%AB%20%D8%A7%D8%B3%D8%AA%D8%A7%D8%B0%20%D8%B9%D9%84%D9%8A%20%D8%AD%D9%8A%D8%AF%D8%B1\/%D8%B9%D9%84%D9%8A%20%D8%AD%D9%8A%D8%AF%D8%B1%201.jpg\" style=\"width: 600px;\" \/><\/span><\/strong><\/span><\/strong><\/span><\/strong><\/span><\/strong><\/span><\/strong><\/span><br \/> , \u064a\u062f\u0648\u0631 \u0627\u0644\u0628\u062d\u062b \u062d\u0648\u0644 :<br \/> <span style=\"text-decoration: underline; color: #c00000;\">Abstract<\/span><br \/> <span style=\"font-size: 20px; font-family: Calibri;\">The main challenge for Cognitive Radio Networks (CRNs) is avoiding interference with PUs caused by unlicensed access, especially in any disaster where the Cognitive Radio (CR) nodes may lose the connection to the data base entity. To cope with this challenge, each CR node depends on its observations, such as Signal to Noise Ratio (SNR) and Signal Strength (SS), to define the free channel. However, this scheme is not efficient because there is a probability of interfering with the passive licensed users. In this paper, we develop a link adaptation approach in CR which estimates the distance to the nearest passive primary user and adapts the link configuration parameters to avoid any possible interference. The results show an improvement in Signal to Interference plus Noise Ratio (SINR) and Bit Error Rate (BER) at all possible passive primary users compared to the literature, without a degradation in the Quality of Service (QoS) requirement of unlicensed users.<br \/> <\/span><br \/> <\/strong><\/span><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0646\u0634\u0631 \u0627\u0644\u062a\u062f\u0631\u064a\u0633\u064a  \u0641\u064a \u0643\u0644\u064a\u062a\u0646\u0627 \u0645.\u0645. \u0639\u0644\u064a \u062d\u064a\u062f\u0631 \u0645\u0647\u062f\u064a \/  \u0642\u0633\u0645 \u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0648\u0627\u0644\u0627\u062a\u0635\u0627\u0644\u0627\u062a\u060c \u0648 \u0637\u0627\u0644\u0628 \u0627\u0644\u062f\u0643\u062a\u0648\u0631\u0627\u0647 \u0641\u064a \u062c\u0627\u0645\u0639\u0629 Ilmenau \u0627\u0644\u0627\u0644\u0645\u0627\u0646\u064a\u0629 &#8230; <a class=\"cz_readmore\" href=\"https:\/\/kecbu.uobaghdad.edu.iq\/?p=684\"><i class=\"fa fa-angle-left\" aria-hidden=\"true\"><\/i><span>\u0627\u0644\u0645\u0632\u064a\u062f<\/span><\/a><\/p>\n","protected":false},"author":27,"featured_media":15836,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-684","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u062a\u062f\u0631\u064a\u0633\u064a \u0641\u064a \u0643\u0644\u064a\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u062e\u0648\u0627\u0631\u0632\u0645\u064a \u064a\u0646\u0634\u0631 \u0628\u062d\u062b\u064a\u0646 \u0641\u064a \u0645\u0624\u062a\u0645\u0631\u064a\u0646 \u0639\u0644\u0645\u064a\u064a\u0646 &#183; 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