Abstract
During the March 2011 meeting of the CTIA MIMO OTA Subgroup (MOSG), the members agreed that the subgroup should first determine “what” aspects of a MIMO-capable device require evaluation; then the group should determine “how” to go about making these measurements. In subsequent meetings of MOSG, new yet-unnamed figures of merit were asked for in order to provide a solution to the carriers' requirements for LTE MIMO OTA evaluation. Furthermore, the December 2011 3GPP RAN4 status report on LTE MIMO OTA listed the evaluation of the use of statistical performance analysis in order to minimize test time and help ensure accurate performance assessment as an open issue. This contribution addresses these petitions by providing four new figures of merit, which could serve the purpose of evaluating the operators' top priorities for MIMO OTA compliance testing. The new figures of merit are MIMO Throughput Effectiveness (MTE), MIMO Device Throughput Effectiveness (MDTE), MIMO Throughput Gain (MTG), and MIMO Device Throughput Gain (MDTG). In this paper, MTE is evaluated using the recently available LTE MIMO OTA RR data from 3GPP.
Highlights
Two levels of Multiple Input Multiple Output (MIMO) testing have been established: Basic and Advanced (Evaluation of MIMO OTA performance in a spatial test environment)
The December 2011 3GPP Radio Access Network 4 (RAN4) status report on Long-Term Evolution (LTE) MIMO OTA listed the evaluation of the use International Journal of Antennas and Propagation of statistical performance analysis in order to minimize test time and help ensure accurate performance assessment as an open issue
Since test time has been proposed to be added as a metric for LTE MIMO OTA compliance testing [2], RC-based methods represent a promising test methodology for LTE MIMO OTA compliance testing
Summary
Two levels of Multiple Input Multiple Output (MIMO) testing have been established: Basic (verification of MIMO OverThe-Air [OTA] performance in an isotropic environment) and Advanced (Evaluation of MIMO OTA performance in a spatial test environment). The December 2011 3GPP RAN4 status report on Long-Term Evolution (LTE) MIMO OTA listed the evaluation of the use International Journal of Antennas and Propagation of statistical performance analysis in order to minimize test time and help ensure accurate performance assessment as an open issue. In this contribution, the authors introduce novel figures of merit with potential for determining these aspects above in a simple and cost-effective way within the Basic MIMO Testing level using the commonly agreed throughput figure of merit and some statistical analyses. Since test time has been proposed to be added as a metric for LTE MIMO OTA compliance testing [2], RC-based methods represent a promising test methodology for LTE MIMO OTA compliance testing
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