MIMO OTA Testing Based on Transmit Signal Processing

TitleMIMO OTA Testing Based on Transmit Signal Processing
Publication TypeJournal Article
Year of Publication2013
AuthorsJ. Gutiérrez, J. Ibáñez, and J. Pérez
JournalHindawi International Journal of Antennas and Propagation
Month PublishedMay
AbstractUsually,multiple-input-multiple-output (MIMO) testbeds are combined with channel emulators for testing devices and algorithms under controlled channel conditions. In this work, we propose a simple methodology that allows over-the-air (OTA) MIMOtesting using a MIMO testbed solely, avoiding the use of channel emulators. The MIMO channel is emulated by linearly combining the signals at the testbed transmitter.The method is fully flexible, so it is able to emulate any equivalent baseband narrowband MIMO channel by adequately selecting the weights of the linear combination. We derive closed-form expressions for the computation of such weights. To prove its feasibility, the method has been implemented and tested over a commercial MIMO testbed.
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