Distributed STBC-Based Downlink NOMA System for LEO Satellite Networks; [저궤도 위성 네트워크를 위한 분산형 STBC 기반 하향링크 NOMA 시스템]

초록

We propose a distributed space-time block code (STBC)-based downlink non-orthogonal multiple access (NOMA) system for low-Earth orbit (LEO) satellite networks. In the proposed framework, each satellite superposes multiple ground users’ signals and transmits them using distributed STBC. Each user then performs conventional STBC decoding followed by successive interference cancellation (SIC) to recover its signals. Simulation results demonstrate that the proposed system achieves significantly improved bit error rate (BER) performance compared with existing NOMA systems even without network information exchange among satellites. © 2026, Korean Institute of Communications and Information Sciences. All rights reserved.

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