Real-time 5G Radio Wave Visualizer

5G Cell Design

BS

MS

BS MS

Macro cell < 6GHz

Small cell > 6GHz

Frequency Higher

Small cells of high frequency added on macro cell in high traffic areas

Must clarify propagation characteristics in high frequency bands

■Deployment scenarios ・Environments: Urban high-

traffic areas, etc. ・Base station antenna heights:

under 10 meters ・Base station antennas: Massive

MIMO type

Wall reflection ⇒Rough surface scattering

Human body shadowing

Rain attenuation

Vegetation loss

Factors affecting high frequency radio propagation

Scattering by moving objects

Penetration loss

2

20 GHz Channel Sounder & Massive Array Antenna

12.3cm

12.3

cm

Antenna Element

7mm

Center frequency 19.85 GHz

Bandwidth 50 MHz Transmission

power 1W

Tx antenna Sleeve

Rx antenna 256 elements (16 by 16)

Transmission signal ＯＦＤＭ

256 elements (16 by 16)

Antenna Pole (Max 10m)

BS Antenna

High-resolution propagation measurements using a massive array antenna in 20 GHz band

3

Real-time 5G Radio Wave Visualizer

Transmission antenna

Received power

Location: Nihonbashi, Tokyo

Scattering waves

Road

Building

Direct wave Low

High

Visualizer Monitor (ex.)

Fisheye camera

Channel sounder

4

Massive Array Antenna Massive

Array Antenna

●受信電力のピーク

TX Tx

5

Received power

These slides include a part of the results from "The research and development project for realization of the fifth-generation mobile communications system" commissioned by The Ministry of Internal Affairs and Communications, Japan.