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

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.

Antenna Design for Microwave and Millimeter Wave Applications: Latest Advances and Prospects

“…Jang et al [3] investigated 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 were included in the electromagnetic (EM) simulation.…”

Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

“…한 편, 국내 발사체 주변에서 시험 측정을 통해 전파 특성을 확인하려는 연구 [18], [19] 가 수행되었으나 정밀한 M&S(modeling and simulation)가 동시에 수행되지 않아 측정결과의 검증 이 어려울 뿐더러, 측정이 용이하지 않은 상황에서는 결과 를 예측하기 어려운 한계가 있다. 최근에는, 국내 발사체 주변환경을 모델링하고, 발사체 고도에 따른 텔레메트리 시스템의 수신전력을 연구한 사례도 보고되었으나 [20] .…”

“…실제 환경에서 수신되 는 신호는 발사체와 제어동 사이에 가시선(line-of-sight: LoS)을 따라 전달되는 직접 경로(direct path)와 지형이나 건물들에 의해서 한 번 이상 굴절이나 회절이 발생한 뒤 전달되는 간접경로(indirect path)로 구분된다. 여기서, 총 수신전력은 식 (1)과 같이 직접경로로 전달되는 신호와 간접경로로 전달되는 신호의 합으로서 나타낼 수 있다[20],[21]…”