Performance Evaluation of a Multi-User MIMO System With Prediction of Time-Varying Indoor Channels

• Bui, Huu Phu

• Ogawa, Yasutaka

• Nishimura, Toshihiko

• Ohgane, Takeo

抄録

In this paper, the performance of a multi-user multiple-input multiple-output (MIMO) system in time-varying channels is evaluated using measurement data. We consider the multi-user MIMO system using a block diagonalization (BD) scheme and an eigenbeam-space division multiplexing (E-SDM) technique. In an ideal case, the BD scheme eliminates inter-user interference, and the E-SDM technique suppresses inter-stream interference. In actual radio environments, however, channels change over time. This causes interference in the multi-user MIMO system even though the BD scheme and the E-SDM technique are used. To overcome this problem, the authors have developed a simple channel prediction scheme on the basis of a linear extrapolation and have demonstrated its effectiveness by computer simulations assuming the Jakes' model. To verify the performance of the channel prediction scheme in actual environments, we conducted a measurement campaign in indoor environments and measured a large amount of channel data. Using these data, we examined the channel transition and channel tracking with the prediction method. Then we obtained the bit-error rate (BER) performance. The prediction technique was shown to track the channel and improve the BER performance almost to that in the ideal time invariant case.

収録刊行物

• IEEE Transactions on Antennas and Propagation

  IEEE Transactions on Antennas and Propagation 61 (1), 371-379, 2013-01

  IEEE

キーワード

• Block diagonalization
• channel prediction
• Doppler frequency
• eigenbeam-space division multiplexing
• multi-user MIMO system
• time-varying environment

詳細情報

• CRID: 1050282813989889920
• NII論文ID: 120005158959
• HANDLE: 2115/51707
• ISSN: 0018926X
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles