Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 57, Issue 8, Pages 2429-2438Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2009.2024491
Keywords
Kirchhoff theory; multiuser MIMO; random rough surface; spatially correlated channel
Funding
- NSF [ECS-0627430, EEC-0415962]
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A novel approach for modeling multiuser multiple-input and multiple-output (MIMO) channels is proposed. Here, the scatterers are modeled as random rough surfaces: Any point on rough surfaces scatters the incident wave into any given direction with certain probability. This leads to correlation across different spatially distributed users. The paper derives closed form expressions for the intra-user (point-to-point) and inter-user (multiuser) correlation of pair-wise channel coefficients. It is observed that the distance of users relative to the scatterer surfaces as well as the degree of roughness impact the correlation region. The technique is applied to both non-line-of-sight (NLOS) and line-of-sight (LOS) scenarios. It is observed that LOS signals drastically boost the correlation of the channel coefficients.
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