# The impact of adaptive guards for 5G and beyond

## TL;DR

This paper explores adaptive guard mechanisms in windowed-OFDM systems for 5G and beyond, optimizing spectral efficiency and interference management through tailored guard design and scheduling algorithms.

## Contribution

It introduces an interference-based scheduling algorithm and optimized guard design to enhance flexibility and spectral efficiency in next-generation communication systems.

## Key findings

- Adaptive guards significantly reduce guard durations.
- Optimized guard design improves spectral efficiency.
- Scheduling algorithm effectively manages interference.

## Abstract

The next generation communication systems are evolving towards an increased flexibility in different aspects. Enhanced flexibility is the key in order to address diverse requirements. This paper presents the significance of adaptive guards considering a windowed-OFDM system which supports a variety of services operating asynchronously under the same network. The windowing approach requires a guard duration to suppress the out-of-band emissions (OOBE), and the guard band is required to handle the adjacent channel interference (ACI) along with the windowing. The guards in both time and frequency domains are optimized with respect to the use case and power offset between the users. To fully exploit and further increase the potential of adaptive guards, an interference-based scheduling algorithm is proposed as well. The results show that the precise design that facilitates such flexibility reduce the guards significantly and boost the spectral efficiency.