Testing of the Carrier Aggregation Mode for a Live LTE Base Station in Reverberation Chamber

Abstract

For the first time, the carrier aggregation feature of a live 4G-LTE base station (BS) is checked adopting a reverberation chamber as a propagating environment. To that purpose, two non adjacent bands were chosen: 800 and 1800 MHz and alternatively set as primary and secondary cells. The multipath conditions were tuned by adding the absorbing material inside the chamber and ranging from an empty condition with a rich multipath to a real environment like an indoor scenario. The latter is a very interesting and popular situation as it represents one in which people use mobile phones. The multipath variation effect on the BS performance was accurately verified by introducing power compensation in order to account for the variation of the chamber quality factor Q due to the insertion of absorbers. A complete over-the-air test was carried out by checking typical transmission quality parameters, that are of interest to manufacturers and mobile network operators. Results highlight differences between the performance of the two bands as a function of multipath degree and signal strength

Advanced Radar Absorbing Ceramic-Based Materials for Multifunctional Applications in Space Environment

“…The use of the reverberation chamber set-up is well-known and mostly adopted in electromagnetic compatibility and electromagnetic interference analysis of electronic or wireless systems [ 48 , 49 , 50 , 51 , 52 , 53 ]. Due to the particular electromagnetic environment, RC systems are frequently adopted to evaluate the EM absorbing capability provided by materials and structures [ 54 , 55 ].…”

Measurement and Analysis of Channel Characteristics in Reflective Environments at 3.6 GHz and 14.6 GHz

“…We used the RC to verify this hypothesis. The RC provides a reliable, controllable, and repeatable multipath environment where reflection is the main mechanism [30][31][32][33].…”

Ultra-broadband mobile networks from LTE-Advanced to 5G: Evaluation of massive MIMO and multi-carrier aggregation effectiveness

“…The broadening of the usable spectrum should lead to significant improvement in terms of performance [6], but mobile network Operators must deal with a limited disposability of bandwidth. Therefore, they encourage to move towards the deployment of massive MIMO but this implies higher manufacturing and implementation costs.…”