{"id":393,"date":"2013-04-01T22:52:40","date_gmt":"2013-04-01T21:52:40","guid":{"rendered":"http:\/\/users.ecs.soton.ac.uk\/sxn\/blog\/?page_id=393"},"modified":"2013-04-01T22:52:40","modified_gmt":"2013-04-01T21:52:40","slug":"lte-advanced-dowlink","status":"publish","type":"page","link":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/ios-apps-2\/lte-advanced-dowlink\/","title":{"rendered":"LTE Advanced"},"content":{"rendered":"<div><label>App Name<\/label>:<\/div>\n<div><span class=\"metadataFieldReadonly\"> <a href=\"https:\/\/itunes.apple.com\/us\/app\/lte-advanced\/id630223833?ls=1&amp;mt=8\" target=\"_blank\">LTE Advanced<\/a> <\/span><\/div>\n<div><span class=\"metadataFieldReadonly\"><br \/>\n<\/span><\/div>\n<div><label>Description<\/label>:<\/div>\n<div>This is an educational simulator for evaluating both the downlink and  uplink performance of the LTE Advanced technology. Turbo-coded OFDMA for  downlink and SC-FDMA for uplink are considered. Both direct  transmission and relaying are considered.  This simulator is especially  useful for research students working on wireless communication  technologies. It is also a useful resource for network engineers to plan  for the placement of base station and relay station for a given  geographical map.By taping the info button at the top left  corner, users can modify the simulation parameters including modulation  scheme, node speed, channel model and the number of users. The transmit  Signal to Noise power Ratio (SNR) and Path Loss can also be edited. User  can choose to use the current location as the center of the Googlemap.  Alternatively, user can choose to use any other location as well as  zooming in and out of the map. When the bottom right button is turned to  ON, the Base station (B), Relay node (R) and User nodes (U) will appear  on the map. Users can tap the nodes to activate (or deactivate) their  movements. The nodes can also be dragged to different locations on the  map.<br \/>\nThe simulator will show the corresponding received SNR  (SNRr), distance between B and U as well as the Bit Error Rate (BER).  When direct transmission between B and U is poor, a relay node will be  employed for Amplify-And-Forward (AAF) or Decode-And-Forward (DAF) the  source message from B to U (in the downlink) or U to B (in the uplink).  Cooperative cognitive ratio technology is also employed for  investigating the potential bandwidth (BW) saving. The calculation of  the BW saved is based on the following research papers:<\/div>\n<ol>\n<li><span class=\"metadataFieldReadonly\">W. Liang, S. X. Ng and L. Hanzo, &#8220;<a href=\"http:\/\/www-mobile.ecs.soton.ac.uk\/sxn\/paper\/wcnc2012-wei.pdf\">Adaptive turbo trellis coded  modulation aided cooperative cognitive radio<\/a>&#8220;, in IEEE Wireless  Communications and Networking Conference (WCNC), Paris, 01 &#8211; 04 Apr  2012. <\/span><\/li>\n<li>W. Liang, S. X. Ng and L. Hanzo, &#8220;<a href=\"http:\/\/www-mobile.ecs.soton.ac.uk\/sxn99r\/paper\/iet13-cr.pdf\">Cooperative Communication Between Cognitive  and Primary Users<\/a>&#8220;, IET Communications, 2013.<\/li>\n<\/ol>\n<div><span class=\"metadataFieldReadonly\"><br \/>\nVersions:<br \/>\n<\/span><\/p>\n<ul>\n<li><span class=\"metadataFieldReadonly\">1.0.4:: In this version, we have included both uplink (SC-FDMA) and downlink  (OFDMA) simulations. MIMO with 2 transmitters and 2 receivers are also  supported. Decode-and-Forward (DAF) is now added on top of the  Amplify-And-Forward (AAF). Source coding is added (Huffman coding) and  the channel coding used is Turbo codes.<br \/>\n<\/span><\/li>\n<li><span class=\"metadataFieldReadonly\">1.0.3:: <span id=\"localizationLightboxUpdate\" class=\"lcAjaxContainer\"><span class=\"metadataFieldReadonly\">This  version supports iPhone5. In previous versions, the nodes were set to  static by default. Now the nodes are set to move by default. The U and R  nodes can still be tapped to pause or to move.<\/span><\/span><span id=\"localizationLightboxUpdate\" class=\"lcAjaxContainer\"><\/span><br \/>\n<\/span><\/li>\n<li><span class=\"metadataFieldReadonly\"><span id=\"localizationLightboxUpdate\" class=\"lcAjaxContainer\"><span class=\"metadataFieldReadonly\">1.0.2<\/span><\/span><span id=\"localizationLightboxUpdate\" class=\"lcAjaxContainer\"><span class=\"metadataFieldReadonly\"> <\/span><\/span><span id=\"localizationLightboxUpdate\" class=\"lcAjaxContainer\"><span class=\"metadataFieldReadonly\">:: Bug fixed: in version 1.0.1, the path loss input keyboard does not disappear after hitting the &#8216;done button&#8217;.<\/span><\/span><br \/>\n<\/span><\/li>\n<\/ul>\n<p><span class=\"metadataFieldReadonly\"><br \/>\n<\/span><\/div>\n","protected":false},"excerpt":{"rendered":"<p>App Name: LTE Advanced Description: This is an educational simulator for evaluating both the downlink and uplink performance of the LTE Advanced technology. Turbo-coded OFDMA for downlink and SC-FDMA for uplink are considered. Both direct transmission and relaying are considered. This simulator is especially useful for research students working on wireless communication technologies. It is [&hellip;]<\/p>\n","protected":false},"author":3109,"featured_media":0,"parent":395,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-393","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/pages\/393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/users\/3109"}],"replies":[{"embeddable":true,"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/comments?post=393"}],"version-history":[{"count":0,"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/pages\/393\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/pages\/395"}],"wp:attachment":[{"href":"https:\/\/generic.wordpress.soton.ac.uk\/sxn\/wp-json\/wp\/v2\/media?parent=393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}