Scaling results on the sum capacity of cellular networks with MIMO links

被引:76
作者
Aktas, Defne [1 ]
Bacha, M. Naeern
Evans, Jamie S.
Hanly, Stephen V.
机构
[1] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey
[2] Univ Melbourne, Dept Elect & Elect Engn, Special Res Ctr Ultra Broadband Informat Networks, Australian Res Council, Melbourne, Vic 3010, Australia
关键词
asymptotic sum capacity; base station cooperation; large system analysis; multiple-access channel (MAC); multiple-input-multiple-output (MIMO) channel; random matrices;
D O I
10.1109/TIT.2006.876241
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Scaling results for the sum capacity of the multiple access, uplink channel are provided for a flat-fading environment, with multiple-input-multiple-output (MIMO) links, when there is interference from other cells. The classical MIMO scaling regime is considered in which the number of antennas per us. er and per base station grow large together. Utilizing the known characterizations of the limiting eigenvalue distributions of large random matrices, the asymptotic behavior of the sum capacity of the system is characterized for an architecture in which the base stations cooperate in the joint decoding process of all users (macrodiversity). This asymptotic sum capacity is compared with that of the conventional scenario in which the base stations only decode the users in their cells. For the case of base station cooperation, an interesting "resource pooling" phenomenon is observed: in some cases, the limiting performance of a macrodiversity multiuser network has the same asymptotic behavior as that of a single-user MIMO link with an equivalent amount of pooled received power. This resource pooling phenomenon allows us to derive an elegant closed-form expression for the sum capacity of a new version of Wyner's classical model of a cellular network, in which MIMO links are incorporated into the model.
引用
收藏
页码:3264 / 3274
页数:11
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