On the Model of DME Spectrum Idle Time and Analysis of Throughput in LDACS-CR System
WANG Lei
YE Qiuxuan
ZHANG Jin
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.
Keywords：L-banddigital aeronautical communicationcognitive radioidle spectrumthroughput
Publication Date：2025-10-25
Online Publishing Date：2025-10-17(First online date of this platform, not the publication date of the document)
Pages：8( 62-69 )