一种基于环的串行级联CPM方法  

Serial concatenated CPM method over rings

作　　者：马子骥[1] 卢浩 董艳茹 MA Ziji;LU Hao;DONG Yanru(School of Electrical and Information Engineering,Hunan University,Changsha 410082,P.R.China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《重庆邮电大学学报（自然科学版）》2018年第5期655-660,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：中央国有资本经营预算项目(财企[2013]470);中央高校基本科研项目(1053214004);国家自然科学基金(61771191);湖南省科技计划重点项目(2015JC3053);湖南省自然科学基金(2017JJ2052);教育部产学合作协同育人项目(201601004010;201701056026)~~

摘　　要：随着通信技术与航空事业的快速发展,实现旅客空中接入的诉求要求未来航空通信系统具备宽带传输能力和更广泛的互联互通能力,然而随着航班航线的增加,航空通信系统间互干扰日益严重,针对此问题,在串行级联连续性相位调制(serially concatenated continuous phase modulation,SCCPM)的基础上设计了一种基于环的串行级联CPM系统方案,此方案通过有效降低同距离通信所需的发射功率来降低航空通信系统间的干扰。分析了模p整数环的多进制卷积编码原理,将无反馈连续相位编码器(continuous phase encoder,CPE)与基于环的卷积码相结合,提出一种内外编码都采用基于环的卷积码的串行级联CPM方法。仿真结果表明,与二进制卷积编码SCCPM相比,该方案有1.25~1.75 d B的信噪比增益,在到达相同通信距离的情况下,系统的发射功率降低了约1/5。In recent years,with the rapid development of communication technology and aviation industry,the demand for passenger air access requires that the future aviation communication system has broadband transmission capacity and more extensive interoperability capabilities.However,due to the skyrocket of airline routes and flights,the mutual interference between aeronautical communication systems has become increasingly serious.Aiming at this problem,we designed a serial concatenated CPM system over rings which was based on serially concatenated continuous phase modulation(SCCPM)to reduce the interference between the communication systems by effectively reducing the transmit power required for communication at the same distance.Firstly,we analyze the p-ary convolutional coding over rings.Then we combine the feedback-free continuous phase encoder(CPE)with the convolutional code.Finally,we propose a serial concatenated CPM method over rings for both internal and external coding.Simulation results show that compared with the performance of the SCCPM with binary convolutional code,the proposed scheme has a signal to noise ratio gain of 1.25~1.75 dB.That means under the same communication distance,the transmission power of the system has reduced by 1/5.

关 键 词：航空通信 基于环的卷积码 串行级联连续性相位调制(SCCPM) 信噪比增益 

分 类 号：TN911.3[电子电信—通信与信息系统]