Abstract
Analysis and design of multielement antenna systems in mobile fading channels require a model for the space-time cross correlation among the links of the underlying multiple-input multiple-output (MIMO) channel. In this paper, we propose a general space-time cross-correlation function for mobile frequency nonselective Rice fading MIMO channels, in which various parameters of interest such as the angle spreads at the base station and the user, the distance between the base station and the user, mean directions of the signal arrivals, array configurations, and Doppler spread are all taken into account. The new space-time cross-correlation function includes all the relevant parameters of the MIMO fading channel in a clean compact form, suitable for both mathematical analysis and numerical calculations/simulations. It also covers many known correlation models as special cases. We demonstrate the utility of the new space-time correlation model by clarifying the limitations of a widely accepted correlation model for MIMO fading channels. As another application, we quantify the impact of nonisotropic scattering around the user, on the capacity of a MIMO fading channel.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 550-560 |
| Number of pages | 11 |
| Journal | IEEE Journal on Selected Areas in Communications |
| Volume | 20 |
| Issue number | 3 |
| DOIs | |
| State | Published - Apr 2002 |
Bibliographical note
Funding Information:Manuscript received February 1, 2001; revised September 29, 2001. This work was supported in part by the National Science Foundation under the Wireless Initiative Program, Grant 9979443. This paper was presented at IEEE International Conference Acoustics, Speech, and Signal Processing, Salt Lake City, Utah, 2001.
Keywords
- Fading channels
- MIMO systems
- Multielement antenna systems
- Multipath channels
- Nonisotropic scattering
- Rice fading
- Shannon capacity
- Space-time correlation