CAJ | 학술논문

自适应编码调制( ACM)技术根据信噪比自适应改变编码和调制方式,可将链路余量自动转换为链路传输能力,从而提高无线信道的频谱利用率。为解决卫星通信中IP化传输对电路带宽需求增加的问题,提出了应用自适应编码调制技术进行IP网互联的方案,通过对DVB-S2_ACM与VersaFEC_ACM两种不同技术的性能比较,分析了VersaFEC_ACM技术在岸船卫星通信IP网互联中应用的可行性及工作过程。链路计算与性能比较结果表明,该技术的应用可使岸船间原有的1024 kb/s电路带宽利用率提高95%,同时抗信道衰落的余量提高6 dB,能够提高卫星通信资源利用率和系统可用度。研究结果可为后续工程应用提供参考。
자괄응편마조제( ACM)기술근거신조비자괄응개변편마화조제방식,가장련로여량자동전환위련로전수능력,종이제고무선신도적빈보이용솔。위해결위성통신중IP화전수대전로대관수구증가적문제,제출료응용자괄응편마조제기술진행IP망호련적방안,통과대DVB-S2_ACM여VersaFEC_ACM량충불동기술적성능비교,분석료VersaFEC_ACM기술재안선위성통신IP망호련중응용적가행성급공작과정。련로계산여성능비교결과표명,해기술적응용가사안선간원유적1024 kb/s전로대관이용솔제고95%,동시항신도쇠락적여량제고6 dB,능구제고위성통신자원이용솔화계통가용도。연구결과가위후속공정응용제공삼고。
The signal-to-noise ratio ( SNR) metric is used to determine the mode of coding and modulation in adaptive coding and modulation( ACM) technique. ACM turns fade margin into increased link capacity and promises to improve the spectral efficiency in wireless channel. In order to solve the problem of the in-creased requirements for transmission bandwidth in IP-based satellite communication, scheme of applying adaptive coding and modulation technique to IP networks interconnection is proposed. By comparison of the performances between two different techniques, DVB-S2_ACM and VersaFEC_ACM, the feasibility and working process of applying VersaFEC_ACM technique to IP networks interconnection over satellite com-munication between the ship and land are analyzed. Link budget calculation and performance comparison results show that bandwidth utilization is improved by 95% while the anti-fading margin increased by 6 dB for the channel of 1 024 kb/s between the ship and land. The resource utilization and system availability in satellite communications can be improved with the technique. This research provides a reference for subse-quent engineering applications.