Evaluation and optimization of LTE MIMO antenna configurations in automotive environment

Abstract

The focus of this paper is the performance evaluation and optimization of LTE MIMO antennas for automotive applications by using field trials in live networks. Being the more challenging frequency range- due to confined space for antenna systems in cars, investigations are carried out in the LTE Band 20 (800 MHz). Key parameters for the evaluation of radio channel quality are presented. Different antenna configurations and designs are qualified in terms of correlation factor (based on complex far-field pattern) and evaluated in test drives with respect to MIMO performance and achievable downlink throughput values. Recommendations for antenna optimization are defined based on the results.