A geometry-based stochastic MIMO model for vehicle-to-vehicle communications
IEEE Transactions on Wireless Communications
Mutual coupling in MIMO wireless systems: a rigorous network theory analysis
IEEE Transactions on Wireless Communications
MIMO transmission over a time-varying channel using SVD
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Cluster Characteristics in a MIMO Indoor Propagation Environment
IEEE Transactions on Wireless Communications
A stochastic MIMO radio channel model with experimental validation
IEEE Journal on Selected Areas in Communications
From theory to practice: an overview of MIMO space-time coded wireless systems
IEEE Journal on Selected Areas in Communications
Comparison of MIMO antenna configurations in picocell and microcell environments
IEEE Journal on Selected Areas in Communications
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Multiple-input multiple-output (MIMO) systems employ advanced signal processing techniques. However, the performance is affected by propagation environments and antenna characteristics. The main contributions of the paper are to investigate Doppler spectrum based on measured data in a typical meeting room and to evaluate the performance of MIMO systems based on an eigenbeam-space division multiplexing (E-SDM) technique in an indoor time-varying fading environment, which has various distributions of scatterers, line-of-sight wave existence, and mutual coupling effect among antennas. We confirm that due to the mutual coupling among antennas, patterns of antenna elements are changed and different from an omnidirectional one of a single antenna. Results based on the measured channel data in our measurement campaigns show that received power, channel autocorrelation, and Doppler spectrum are dependent not only on the direction of terminal motion but also on the antenna configuration. Even in the obstructed-line-of-sight environment, observed Doppler spectrum is quite different fromthe theoretical U-shaped Jakes one. In addition, it has been also shown that a channel change during the time interval between the transmit weight matrix determination and the actual data transmission can degrade the performance of MIMO E-SDM systems.