{"id":2862,"date":"2015-07-14T07:16:40","date_gmt":"2015-07-14T07:16:40","guid":{"rendered":"http:\/\/network.ee.tsinghua.edu.cn\/niulab\/?p=2862"},"modified":"2016-07-14T07:21:04","modified_gmt":"2016-07-14T07:21:04","slug":"optimal-antenna-cluster-size-in-cell-free-distributed-large-scale-antenna-systems-with-imperfect-csi-and-inter-cluster-interference-2","status":"publish","type":"post","link":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/?p=2862","title":{"rendered":"Optimal Antenna Cluster Size in Cell-Free Distributed Large-Scale Antenna Systems with Imperfect CSI and Inter-Cluster Interference"},"content":{"rendered":"<p><span class=\"paper_subtitle\">LANGUAGE<\/span> English<\/p>\n<p><span class=\"paper_subtitle\">SOURCE<\/span> <strong><em>IEEE Trans. Vehicular Tech, <\/em><\/strong>vol. 64, no. 7, pp. 2834-2845, Jul. 2015<\/p>\n<p><span class=\"paper_subtitle\">Published Date<\/span>:2015<\/p>\n<p><span class=\"paper_subtitle\">ABSTRACT<\/span><\/p>\n<p>In cell-free large-scale distributed antenna systems<br \/>\n(L-DASs), the antennas are distributed over the intended coverage<br \/>\narea. Introducing cooperation among the antennas can<br \/>\nsignificantly improve the system throughput. However, only finitecluster-<br \/>\nsize (limited) cooperation with L-DAS antenna clusters is<br \/>\nrealistic due to practical limitations. In this paper, the impact<br \/>\nof antenna cluster size on the downlink sum rate of frequencydivision<br \/>\nduplex (FDD) cell-free L-DASs is analyzed, considering<br \/>\nimperfect channel state information (CSI) and intercluster<br \/>\ninterference (ICLI). We investigate the optimal cluster size in<br \/>\nterms of maximizing the downlink sum rate with respect to the<br \/>\noverhead of imperfect channel training and feedback. When the<br \/>\nnumber of users is sufficiently large, closed-form lower bounds<br \/>\nof the ergodic sum capacity, which are leveraged to analyze the<br \/>\nsystem performance, are derived by constructing different rateachieving<br \/>\nuser-scheduling schemes. Both analog and digital feedback<br \/>\nschemes are considered to evaluate the imperfect channel<br \/>\nfeedback. Based on these, closed-form expressions of the optimal<br \/>\ncluster size for 1-D antenna topology systems and the corresponding<br \/>\nachievable rates are derived. The scaling law of the optimal<br \/>\ncluster size for 2-D antenna topology systems is also given. Numerical<br \/>\nresults demonstrate the impact of the signal-to-noise ratio<br \/>\n(SNR) and the block length on the achievable rates and the optimal<br \/>\ncluster size, which agree with our analytical results.<br \/>\nIndex Terms\u2014Broadcast channel (BC), frequency-division duplex<br \/>\n(FDD), imperfect channel state information (CSI), large-scale<br \/>\ndistributed antenna systems (L-DASs).<\/p>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2015\/07\/\u59dc\u4e4b\u6e90-TVT.pdf\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-117\" title=\"pdf\" src=\"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/wp-content\/uploads\/2010\/08\/pdf.gif\"alt=\"\" width=\"95\" height=\"50\" \/><\/a>Zhiyuan Jiang, Sheng Zhou, and Zhisheng Niu, <span class=\"papertitle\">Optimal Antenna Cluster Size in Cell-Free Distributed Large-Scale Antenna Systems with Imperfect CSI and Inter-Cluster Interference<\/span>, <span class=\"papersource\">  IEEE Trans. Vehicular Tech, vol. 64, no. 7, pp. 2834-2845, Jul. 2015<\/span><\/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":[7],"tags":[100],"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\/2862"}],"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=2862"}],"version-history":[{"count":3,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/posts\/2862\/revisions"}],"predecessor-version":[{"id":2866,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=\/wp\/v2\/posts\/2862\/revisions\/2866"}],"wp:attachment":[{"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/network.ee.tsinghua.edu.cn\/niulab\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}