# Research on Collision Access Method for Satellite Internet of Things Based on Bayliss Window Function

## TL;DR

This paper proposes a new method to improve satellite IoT performance by optimizing beam weights, reducing collisions and boosting throughput.

## Contribution

A novel auxiliary beam weight optimization method is introduced to enhance satellite IoT system throughput and robustness.

## Key findings

- The proposed method increases the success rate of collision signal separation by expanding main flap roll-off bands.
- Simulation results show significant improvement in system throughput performance.
- The method is robust against direction of arrival and amplitude-phase errors.

## Abstract

Satellite Internet of Things (IoT) terminals face design constraints regarding low power consumption and light control. These constraints pose a significant collision risk when utilizing traditional random-access protocols, making it challenging to meet the system throughput requirements. Auxiliary beam schemes based on conventional beam formation suffer from the problem of the auxiliary beam shape being limited by the fixed directional map. This leads to the problem of limited throughput enhancement. In this paper, an auxiliary beam weight optimization method for satellite IoT capacity enhancement is proposed. By increasing the number of main flap roll-off bands, the success rate of collision signal separation is increased. It is possible to improve the system access performance. The simulation results indicate that the proposed method can significantly improve the system throughput performance. Furthermore, it can withstand some direction of arrival (DOA) estimation errors and amplitude–phase errors. Robustness is possessed.