Investigation of Wireless Channel Asymmetry in Indoor Environments

TL;DR

This paper investigates the causes of wireless channel asymmetry in indoor environments, demonstrating through measurements that real-world channels are often asymmetric, which impacts modeling for communication and localization.

Contribution

It provides empirical evidence of wireless channel asymmetry in indoor settings and discusses potential causes, aiding more accurate modeling for wireless systems.

Findings

Wireless channels are asymmetric in realistic indoor scenarios

Measurement data supports the presence of asymmetry

Recommendations for modeling and system design

Abstract

Asymmetry is unquestionably an important characteristic of the wireless propagation channel, which needs to be accurately modeled for wireless and mobile communications, 5G networks, and associated applications such as indoor/outdoor localization. This paper reports on the potential causes of propagation asymmetry. Practical channel measurements at Khalifa University premises proved that wireless channels are asymmetric in realistic scenarios. Some important conclusions and recommendation are also summarized.