{"id":1689,"date":"2013-06-17T07:16:53","date_gmt":"2013-06-17T07:16:53","guid":{"rendered":"http:\/\/network.ee.tsinghua.edu.cn\/niulab\/?p=1689"},"modified":"2013-06-17T07:17:29","modified_gmt":"2013-06-17T07:17:29","slug":"1689","status":"publish","type":"post","link":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/?p=1689","title":{"rendered":"\"Spectrum Sharing in Multihop Cognitive Relay Networks\" by Dr. Wei Zhang"},"content":{"rendered":"<p align=\"center\"><strong>Spectrum Sharing in Multihop Cognitive Relay Networks<\/strong><strong><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p align=\"center\">Dr. Wei Zhang<\/p>\n<p align=\"center\"><em>Senior Lecturer<\/em><\/p>\n<p align=\"center\">School of Electrical Engineering &amp; Telecommunications<\/p>\n<p align=\"center\">TheUniversityofNew South Wales<\/p>\n<p align=\"center\">Sydney,Australia<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong><em>Abstract:<\/em><\/strong><\/p>\n<p>Cognitive radio is a novel and promising communications paradigm to address the spectrum insufficiency problem by employing dynamic spectrum access technologies to utilize the licensed spectrum flexibly and sufficiently. In cognitive radio networks, unlicensed cognitive users can access the radio spectrum together with the licensed primary users (PUs) when the spectrum is not occupied by the PUs (white space) or when the spectrum is partially occupied by low power distant PUs and the incurred interference to the PUs is below a predetermined interference temperature limit (grey space). In this work, we develop a novel \u201cwhispering radio\u201d technique by utilizing multihop relay techniques and smart power control to take full advantage of the \u201cgrey space\u201d of the licensed spectrum. The proposed \u201cwhispering radio\u201d can maximize the spectrum utilization efficiency by allowing cognitive radios to access the licensed band even when the primary user is in operation.<a href=\"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2013\/06\/60\u4e5890\u6d77\u62a5\uff0812.23\uff09-01.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1690\" title=\"A2\u00e6\u00b5\u00b7\u00e6\u008a\u00a5\u00ef\u00bc\u008810.8\u00ef\u00bc\u0089\" src=\"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2013\/06\/60\u4e5890\u6d77\u62a5\uff0812.23\uff09-01-682x1024.jpg\" alt=\"\" width=\"640\" height=\"960\" srcset=\"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2013\/06\/60\u4e5890\u6d77\u62a5\uff0812.23\uff09-01-682x1024.jpg 682w, https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2013\/06\/60\u4e5890\u6d77\u62a5\uff0812.23\uff09-01-200x300.jpg 200w, https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2013\/06\/60\u4e5890\u6d77\u62a5\uff0812.23\uff09-01.jpg 756w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spectrum Sharing in Multihop Cognitive Relay Networks &nbsp; Dr. Wei Zhang Senior Lecturer School of Electrical Engineering &amp; Telecommunications TheUniversityofNew South Wales Sydney,Australia &nbsp; \u00a0 Abstract: Cognitive radio is a novel and promising communications paradigm to address the spectrum insufficiency &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[103],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/posts\/1689"}],"collection":[{"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1689"}],"version-history":[{"count":2,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/posts\/1689\/revisions"}],"predecessor-version":[{"id":1692,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/posts\/1689\/revisions\/1692"}],"wp:attachment":[{"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}