Acta Metallurgica Sinica(English letters) ›› 2010, Vol. 17 ›› Issue (3): 38-44.doi: 10.1016/S1005-8885(09)60466-0

• Wireless • 上一篇    下一篇

Spatial characteristics and capacity investigation of indoor hotspot channel based on wideband MIMO measurement at 4.9 GHz

聂欣1,张建华2,黄晨4,刘泽民3,张平4   

  1. 1. 北京邮电大学信息与通信学院;北京邮电大学无线新技术研究所;教育部泛网重点实验室
    2. 北京邮电大学
    3. 北京邮电大学电信工程学院
    4. 北京邮电大学无线新技术研究所
  • 收稿日期:2009-06-01 修回日期:2010-01-22 出版日期:2010-06-30 发布日期:2010-06-29
  • 通讯作者: 聂欣 E-mail:niexin1983@gmail.com
  • 基金资助:

    国家级.国家“863计划”项目;其他

Spatial characteristics and capacity investigation of indoor hotspot channel based on wideband MIMO measurement at 4.9 GHz

  • Received:2009-06-01 Revised:2010-01-22 Online:2010-06-30 Published:2010-06-29

摘要:

In this article, results obtained from wideband multiple-input multiple-output channel measurements at 4.9 GHz are presented. Measurements were performed in an indoor hotspot scenario with both line-of-sight and non-line-of-sight propagation conditions. Vertical polarized uniform linear arrays (ULAs) with different antenna spacing and orientation were utilized for investigating the impact of antenna configurations on the system performance. Based on measured channel impulse responses, the spatial correlation of ULA is analyzed and compared with the theoretical values calculated from the power azimuth spectrum. Following that, the eigenvalue statistics and capacity with respect to antenna spacing and orientation are given and compared. The diversity-multiplexing tradeoff (DMT) of measured channels at operational signal-to-noise ratio (SNR) is also presented. The reason why the DMT of measured channels is much lower than that of i.i.d. Rayleigh channels is specified.

关键词:

wideband multiple-input multiple-output (MIMO) measurement, indoor hotspot scenario, spatial characteristics, capacity

Abstract:

In this article, results obtained from wideband multiple-input multiple-output channel measurements at 4.9 GHz are presented. Measurements were performed in an indoor hotspot scenario with both line-of-sight and non-line-of-sight propagation conditions. Vertical polarized uniform linear arrays (ULAs) with different antenna spacing and orientation were utilized for investigating the impact of antenna configurations on the system performance. Based on measured channel impulse responses, the spatial correlation of ULA is analyzed and compared with the theoretical values calculated from the power azimuth spectrum. Following that, the eigenvalue statistics and capacity with respect to antenna spacing and orientation are given and compared. The diversity-multiplexing tradeoff (DMT) of measured channels at operational signal-to-noise ratio (SNR) is also presented. The reason why the DMT of measured channels is much lower than that of i.i.d. Rayleigh channels is specified.

Key words:

wideband multiple-input multiple-output (MIMO) measurement, indoor hotspot scenario, spatial characteristics, capacity