A Reverberation Chamber to Realize Multipath-rich Environment [III] : Environment Control by Electromagnetic Wave Absorbing Sheet: Part 2
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Creation of multipath-rich propagation environment is needed to evaluate the performance of a MIMO communication terminal assuming the operation in a real environment. For this purpose, there are two types of schemes. One is a fading-emulator-based scheme which arranges a number of actual radiation antennas representing scattering objects. The other is a radio echoic chamber named "reverberation chamber" surrounded by 6-plate metallic walls. In this paper, we focus our analysis on our reverberation chamber OTA system which is considered to be inflexible for propagation parameter control such as delay spread. By extending the results given in Ref. [9], we pursue wider range control of delay spread using more radio absorbing sheets without changing other propagation parameter values. Moreover, the size of OTA testing area where the characteristics of multipath propagation environment must be uniform statistically is identified.
