无线电工程2025，Vol.55Issue(12)：2409-2417,9.DOI:10.3969/j.issn.1003-3106.2025.12.009
存量手机直连卫星系统与IMT系统的同频兼容分析
Analysis of Co-channel Compatibility Between Legacy Direct-to-Cell Satellite Systems and IMT Systems
摘要
Abstract
This study addresses the co-channel coexistence between existing direct-to-cell satellite systems-requiring no hardware modifications at the user terminal and enabled solely through network-side adaptation-and International Mobile Telecommunications(IMT)systems.A modeling and simulation framework is constructed for three typical interference scenarios:terrestrial-to-terrestrial,space-to-terrestrial,and terrestrial-to-space.Based on S-band system parameters and combining a hole-punch topology with Monte Carlo simulation,the interference levels and required isolation conditions are evaluated for different scenarios.The results show that,in the terrestrial-to-terrestrial scenario,interference from satellite terminals to IMT base stations requires about 5 km of geographic separation,while interference from IMT base stations to satellite terminals requires alout 15 km;in the space-to-terrestrial scenario,under a beam spot diameter of 30 km,an isolation distance of about 120 km is needed;in the terrestrial-to-space scenario,if IMT users transmit at a maximum power of 23 dBm,the exceedance ratio is about 65％,which can be reduced to within the threshold by using average power together with beam isolation.The proposed modeling and simulation method provides a reference for interference analysis and frequency coordination between space and terrestrial systems.关键词
手机直连卫星/频率兼容共存/干扰分析/国际移动通信系统/存量终端Key words
direct-to-cell satellite/frequency compatibility and coexistence/interference analysis/IMT system/legacy terminals分类
信息技术与安全科学引用本文复制引用
李伟,张锦峰,吕俊璋,李勇,韦升坤..存量手机直连卫星系统与IMT系统的同频兼容分析[J].无线电工程,2025,55(12):2409-2417,9.基金项目
北京市自然科学基金(L222003) （L222003）
国家重点研发汁划青年科学家项目(2024YFB2907600)Beijing Municipal Natural Science Foundation of China(L222003) （2024YFB2907600）
Young Scientists Project of National Key R&D Program of China(2024YFB2907600) （2024YFB2907600）
