Multiple antenna multiple user channels: Optimisation in low SNR

被引：4
作者：
Boche, H [1 ]
Jorswieck, EA [1 ]
机构：
[1] Heinrich Hertz Inst Nachrichtentech Berlin GmbH, Fraunhofer Inst Commun Engn, D-10587 Berlin, Germany
来源：
2004 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, VOLS 1-4: BROADBAND WIRELESS - THE TIME IS NOW | 2004年
关键词：
space-time processing; MIMO systems; medium access control;
D O I：
10.1109/WCNC.2004.1311597
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
We study the sum capacity of multiple antenna multi-user wireless channels. We assume that base station and mobiles have perfect channel state information (CSI). The optimal transmission strategy for the single-antenna multiple-access channel is to allocate power only for the best user [1]. If multiple antennas are used at the base Station and Further on at the mobiles. it turns out that more than one user is allowed to transmit in the same time slot. lit addition to this, the number of active users depends on the SNR. The higher the SNR the more users are active. It can be shown that for SNR values below some threshold only one user is active. We analyse the low SNR behaviour and give necessary and sufficient conditions for this this threshold value. Finally. our development of the results is accompanied by many examples and illustrations and numerical simulations.
引用
收藏
页码：513 / 518
页数：6
相关论文
共 13 条
  • [1] CDMA/HDR: A bandwidth-efficient high-speed wireless data service for nomadic users
    Bender, P
    Black, P
    Grob, M
    Padovani, R
    Sindhushayana, N
    Viterbi, A
    [J]. IEEE COMMUNICATIONS MAGAZINE, 2000, 38 (07) : 70 - 77
  • [2] BOCHE H, 2002, P WPMC
  • [3] BOCHE H, 2003, IN PRESS AS C
  • [4] BOYD S, 2003, EE364 UCLA
  • [5] CAIRE G, 2001, 36 AS C SIGN SYST CO
  • [6] WRITING ON DIRTY PAPER
    COSTA, MHM
    [J]. IEEE TRANSACTIONS ON INFORMATION THEORY, 1983, 29 (03) : 439 - 441
  • [7] KNOPP R, 1995, P INT C COMM
  • [8] Marshall A. W., 1979, INEQUALITIES THEORY, V143
  • [9] RHEE W, 2001, P 35 ASIL C SIGN SYS
  • [10] Capacity of multi-antenna Gaussian channels
    Telatar, E
    [J]. EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS, 1999, 10 (06): : 585 - 595
12