摘要
随着空中交通的信息传输与新应用拓展需求不断增加,1090ES信号容量有限问题日益显现,对1090ES信号进行容量扩充是一种有效解决途径。针对一种基于脉内调相的1090ES信号扩容技术,给出了叠加调制的信号模型,研究了1090ES信号的解调解码算法;在GNU Radio+USRP软件无线电平台上,实现了1090ES扩容信号的产生和接收处理,包括脉冲位置调制(Pulse Position Modulation,PPM)与8PSK叠加调制、低通滤波、报头检测、载波同步、PPM解码和相位解调等,并利用Matlab对实验的解码错误率和信号的频谱特性做了统计分析与仿真,结果表明了该扩容技术的可行性。
With the increasing demand of information transmission and new application expansion in air traffic,the problem of 1090 ES signal’s capacity will become increasingly apparent,and expanding the capacity of 1090 ES signal is an effective solution. For 1090 ES signal expansion technology based on in-pulse phase modulation,composite modulation model of 1090 ES signal based on in-pulse phasing technology is presented,and the demodulation and decoding algorithm of 1090 ES signal is studied. The generation and receiving processing of 1090 ES expansion signal is realized by using GNU Radio + USRP software radio platform,including pulse position modulation( PPM) and 8 PSK composite modulation,low-pass filtering,header detection,carrier synchronization,PPM decoding and phase demodulation. Matlab is used to make a statistical analysis and simulation of the experimental decoding error rate and the spectral characteristic of1090 ES expansion signal,and the results show the feasibility of the expansion technology.
作者
黄清
王洪
王飞
史志举
HUANG Qing;WANG Hong;WANG Fei;SHI Zhiju(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;AVIC Leihua Electronic Technology Research Institute,Wuxi 214100,China)
出处
《电讯技术》
北大核心
2020年第3期298-302,共5页
Telecommunication Engineering
基金
航空科学基金资助项目(ASFC-20172080005)。
