Outdoor to Indoor Penetration Loss at 28 GHz for Fixed Wireless Access

TL;DR

This study investigates outdoor to indoor signal penetration at 28 GHz in urban microcells, using advanced channel sounding techniques to analyze path loss, delay, and angular spreads for different building types.

Contribution

It provides detailed measurements of 28 GHz propagation characteristics for outdoor-to-indoor scenarios, utilizing a real-time phased array channel sounder with high phase stability.

Findings

Quantifies path loss differences between outdoor and indoor environments.

Analyzes delay and angular spreads for various building types.

Demonstrates the effectiveness of phased array antennas in dynamic measurements.

Abstract

This paper present the results from a 28 GHz channel sounding campaign performed to investigate the effects of outdoor to indoor penetration on the wireless propagation channel characteristics for an urban microcell in a fixed wireless access scenario. The measurements are performed with a real-time channel sounder, which can measure path loss up to 169 dB, and equipped with phased array antennas that allows electrical beam steering for directionally resolved measurements in dynamic environments. Thanks to the short measurement time and the excellent phase stability of the system, we obtain both directional and omnidirectional channel power delay profiles without any delay uncertainty. For outdoor and indoor receiver locations, we compare path loss, delay spreads and angular spreads obtained for two different types of buildings.