Compact Spatial Correlation Formula for MIMO in Factory Environment
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Abstract
Multiple-Input Multiple-Output (MIMO) transmission scheme is considered as a promised technology for future wireless communication since it offers significant increases in data throughput and link range without additional bandwidth or transmitted power. However, the MIMO channel capacity is severely degraded by the correlation between individual sub channels of its channel matrix. Hence, in system simulations, the correlation should be taken into account. Since the conventional method such as the extended one ring and double ring scatterers model require the knowledge of each multipath components, it is obvious that a simpler model, but accurate enough, should be proposed to reduce the complexity and the calculation time of the model. In this paper, we propose a compact spatial correlation formula that can be used to calculate the channel capacity of MIMO system in 950 MHz band at factory environment. The validity of the proposed model also holds for other environments and frequency bands. With the proposed model, we need to know only three important parameters, such as antenna size, antenna separation, and Rician K factor to generate the spatial correlation of the channel.
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