Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

Doyoung Jang,Chun Won Kim,Sungsik Wang,Hosung Choo,Yong Bae Park

doi:10.3390/app10176089

Doyoung Jang, Chun Won Kim + Show 3 more

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https://doi.org/10.3390/app10176089

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Abstract

This article investigates a novel estimation method to optimize the position of a relay station of the S-band telemetry system in outdoor environments. To determine an optimal relay station position, complex terrain surface and buildings near the Naro Space Center are included in the EM (Electromagnetic) simulation. The optimal relay station position is then determined using the estimation method by comparing the path losses from the rocket to the main station and some candidate positions of the relay station. To better understand the path loss, the ray analysis is also conducted, and the result demonstrates that once the rocket altitude to be covered by the relay station is determined, it is possible to find the optimum position of the relay station.

Highlights

Along with the recent widespread expansion of aerospace applications, the demand for a variety of wireless communication technologies is gradually increasing in rocket launch events [1,2,3]
Considering these issues, we investigated the optimal location of the relay station at the Naro station
We have investigated a novel estimation method to optimize the position of a relay station of the S-band telemetry systema in outdoor environments

Summary

Introduction

Along with the recent widespread expansion of aerospace applications, the demand for a variety of wireless communication technologies is gradually increasing in rocket launch events [1,2,3]. To determine an optimal relay station position, a ray tracing-based EM simulation software (Wireless InSite) is utilized [20], complex terrain surfaces and buildings near the. Since the shorter distance between the transmitting and receiving antennas has a lower path loss, the relay station near the rocket is more advantageous for maintaining a better communication link. We found that slow envelope variations and fast fluctuations in the received power are due to the transmitting antenna pattern and the phase difference between the direct and indirect reflected rays, respectively Based on this path loss analysis, according to the rocket’s altitude, it is possible to determine the optimal relay position considering the outdoor environment near the rocket launch site

Path Loss Simulation for Optimal Relay Position

Verification Using Ray Analysis

Relation between angle andthe the rocket’s altitude in LoS the

Drawbacks

Conclusions