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多用户MIMO-OFDM系统中的一种新的用户调度算法 被引量：1

An Novel Scheduling Strategy for Multiuser MIMO-OFDM Systems
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摘要 本文针对多用户环境下的多天线正交频分复用下行系统,提出了一种新的基于迫零波束成型的用户调度算法。迫零波束成型是在发送端消除用户间的干扰生成多个独立的空间子信道,来实现空间复用。由于在多天线正交频分复用下行系统中最优的用户选择算法需要遍历所有可能的用户集合,算法复杂度非常大,本文提出了一种简化算法。所提算法在保证每个用户的速率要求的情况下,通过贪婪算法来选择每个子载波上的用户集合,以最小化系统的发送功率。仿真结果表明在满足用户的速率要求下能达到很好的系统性能。 A novel scheduling strategy is proposed for Multiuser MIMO - OFDM systems with zero - forcing beamforming in this paper. The ZFBF for multiuser MIMO makes multiple spatial channels by re - moving multiuser interference and the subcarrier allocation can be performed over spatial and frequency domain. Since the optimal method has very high computational complexity, a low -complexity algorithm is proposed. Using a greedy algorithm to select the users set in each subcarrier, our objective is to minimize the total transmit power while satisfying the target data rates of all users. The numerical results show that theing the rate demand of users.
作者 舒锦 卫国
机构地区 中国科学技术大学无线网络通信安徽省重点实验室
出处 《无线通信技术》 2009年第4期5-9,共5页 Wireless Communication Technology
基金 国家重点基础研究发展计划(973计划)资助课题(2007CB310602)资助
关键词 多天线正交频分复用 用户选择算法 发送功率 MIMO- OFDM adaptive resource allocation transmit power
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献8

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同被引文献13

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  • 6SERBETLI S, YENER A. Transceiver optimization for muhiuser MIMO systems [ J ]. IEEE Trans Sig Process- ing, 2004, 52(2) : 214-226.
  • 7Nojima D, Lanante L, Nagao Y, Kurosaki M and Ochi H. Performance Evaluation for Multi-User MIMO IEEE 802.11 ac Wireless LAN System [ J ]. IEEE CONFER- ENCE PUBLICATIONS, 2012, 804-808.
  • 8Yoo T, Goldsmith A. On the optimality of multi-antenna broadcast scheduling using zero-forcing beamforming [ J]. IEEE Journal on Selected Area in Communications, 2006,24(3 ) :528-541.
  • 9The 802. 11n Working Group of the 802 Committee. Wire- less LAN Medium Access Control (MAC) and Physical Layer Specifications(PHY) [ S]. Amendment 5 : Enhance- ments for Higher Throughput, IEEE Std. 802.11 n, 2009: 308-310.
  • 10The 802. 1 l ac Working Group of the 802 Committee. WLAN 802.11 ac Standard-IEEE P802.11 ac/D1.4 [ S ] , 2011:40-56.

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无线通信技术
2009年 第4期

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