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Inter-Beam Co-Channel Downlink and Uplink Interference for 5G New Radio in mm-Wave Bands
Kamil Bechta1, Jan M Kelner2, Cezary Ziółkowski2
1Nokia Solutions and Networks, 54-130 Wrocław, Poland.
Sensors (Basel, Switzerland)
|January 28, 2021
Summary
This study introduces a method to assess co-channel interference in fifth-generation (5G) systems, crucial for efficient spectrum use. The findings help determine optimal antenna beam separation for reliable 5G micro-cell base stations.
Area of Science:
- Wireless communication systems
- Electromagnetics and antenna theory
- Signal processing
Background:
- Fifth-generation (5G) systems utilize multi-beam antennas to enhance spectral efficiency by reusing frequency bands across angularly separated beams.
- Co-channel interference is a significant challenge in 5G systems, impacting signal quality and necessitating careful management of antenna beam configurations.
- Efficient spectrum utilization is paramount for the scalability and performance of 5G networks, especially in micro-cell deployments.
Purpose of the Study:
- To develop and present a methodology for assessing co-channel interference in multi-beam 5G antenna systems.
- To establish a basis for determining the minimum required separation angle between antenna beams to ensure acceptable interference levels.
- To analyze interference in the lower millimeter-wave band for 5G micro-cell base stations.
Main Methods:
- A multi-ellipsoidal propagation model (MPM) was developed to map multipath propagation phenomena, incorporating antenna beam directivity.
- Simulation tests were conducted to demonstrate the interference level designation procedure.
- Signal-to-interference ratio (SIR) was analyzed against varying separation angles and distances between the base station (gNodeB) and user equipment (UE) for both downlink and uplink scenarios.
Main Results:
- The study demonstrated how signal-to-interference ratio (SIR) changes with the angular separation between serving and interfering beams and the distance to user equipment.
- Simulation results provide a clear relationship between beam separation, distance, and interference levels in 5G micro-cell environments.
- The methodology effectively quantifies interference, enabling informed decisions on antenna beam placement and operational parameters.
Conclusions:
- The developed methodology provides a robust framework for evaluating co-channel interference in 5G multi-beam systems.
- The findings are essential for optimizing spectral resource utilization and ensuring reliable communication performance in 5G networks.
- This research supports the deployment of efficient 5G micro-cell base stations by defining critical antenna beam separation parameters.
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