Analysis of Near-Field Effects, Spatial Non-Stationary Characteristics Based on 11-15 GHz Channel Measurement in Indoor Scenario

TL;DR

This paper investigates near-field effects and spatial non-stationary characteristics of 6G channels in indoor scenarios using measurements at 11-15 GHz, providing models and analysis relevant for future wireless systems.

Contribution

It derives a detailed near-field spherical-wave signal model and discusses stationary interval division, analyzing the impact of LOS and OLOS environments on near-field effects.

Findings

Near-field effects are significantly influenced by LOS and OLOS conditions.

A new stationary interval division method based on statistical properties is proposed.

Channel characteristics at 11-15 GHz are characterized for 6G indoor scenarios.

Abstract

In the sixth-generation (6G), with the further expansion of array element number and frequency bands, the wireless communications are expected to operate in the near-field region. The near-field radio communications (NFRC) will become crucial in 6G communication systems. The new mid-band (6-24 GHz) is the 6G potential candidate spectrum. In this paper, we will investigate the channel measurements and characteristics for the emerging NFRC. First, the near-field spherical-wave signal model is derived in detail, and the stationary interval (SI) division method is discussed based on the channel statistical properties. Then, the influence of line-of-sight (LOS) and obstructed-LOS (OLOS) environments on the near-field effects and spatial non-stationary (SnS) characteristic are explored based on the near-field channel measurements at 11-15 GHz band. We hope that this work will give some reference to the NFRC research.