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An Inter-Lab/Inter-Technique OTA Performance Comparison Testing by CTIA MOSG and supported by 3GPP RAN4 has recently taken place. In this contribution, test results obtained by different Reverberation Chamber vendors with the NIST, Isotropic UMI (IS UMi) and Isotropic UMa (IS UMa) channel models are presented. Standard deviations between different candidate methodologies show that reverberation chambers...
A final call for text proposals regarding the TR 25.9xx document for MIMO OTA testing have recently been placed. Previous documents include the methodologies for several anechoic chamber candidates and one mode-stirred reverberation chamber candidate. The objective of this contribution is to present the recent advances in mode-stirred reverberation chamber use for wireless MIMO Over-The-Air testing...
Mode stirred reverberation chambers (MSC) are used for measuring different antenna parameters, including some related to MIMO. In a single-cavity MSC, conventionally known as reverberation chamber, the environment is isotropic and the amplitude of the signal is Rayleigh distributed. This contribution presents novel methods to accurately emulate a more realistic distribution from a Rayleigh-fading...
The rationale for deriving basic restrictions to electromagnetic field (EMF) exposure and their associated safety margins is not fully standardized and diverse values are employed depending upon the thermal effect being considered. With the recent capabilities of modern computers, hybrid Maxwell's and heat-transfer equations have been solved for the human exposure to EMF problem. In this contribution,...
Hybrid MIMO systems are defined as a combination of architectures designed to achieve both multiplexing gain (such as VBLAST), and diversity gain, (such as STBC). In these systems the detection can be performed with an ordered successive interference cancellation (OSIC) based on SQRD algorithm, in which the layers with diversity are decoded first. In this paper we introduce a new way to represent...
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