空军工程大学学报2025，Vol.26Issue(5)：62-69,8.DOI:10.3969/j.issn.2097-1915.2025.05.007
LDACS-CR系统中DME频谱空闲时间建模与吞吐量分析
On the Model of DME Spectrum Idle Time and Analysis of Throughput in LDACS-CR System
摘要
Abstract
Spectrum resources being short at L-band in digital aeronautical communication system(LDACS),this paper introduces a cognitive radio(CR)technology to improve communication efficiency by reasonably utilizing its idle spectrum on the premises of normal operation of distance measuring equip-ment(DME)being not affected.Firstly,the system framework of LDACS-CR is designed and DME spec-trum occupancy is modeled by utilizing a two-state Markov chain,and then cyclo-stationary feature detec-tion is utilized for perceiving DME signals in combination with estimating channel average periods to ana-lyze their spectral idle time by existing methods.Finally,the throughput of LDACS-CR system is analyzed under conditions of different scenarios.The research results indicate that by introducing cognitive radio technology,LDACS systems can achieve higher data transmission rates,providing new ideas for spectrum planning and deployment.关键词
L波段/数字航空通信/认知无线电/空闲频谱/吞吐量Key words
L-band/digital aeronautical communication/cognitive radio/idle spectrum/throughput分类
信息技术与安全科学引用本文复制引用
王磊,叶秋炫,张劲..LDACS-CR系统中DME频谱空闲时间建模与吞吐量分析[J].空军工程大学学报,2025,26(5):62-69,8.基金项目
国家重点研发计划(2022YFB3904503) （2022YFB3904503）
中国民航大学研究生科研创新项目(2023YJSKC02005) （2023YJSKC02005）
