卫星通信物理层非直扩链路的单音干扰影响解析  

Analysis of Effect of Single-tone Jamming on Non-DS Physical Layer Link of Satellite Communication

作　　者：马立波[1] 王赛宇[2] 刘建成 MA Libo;WANG Saiyu;LIU Jiancheng(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2021年第1期8-12,共5页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：针对卫星通信传输链路中常见的单音干扰,以典型的卫星通信物理层非扩频传输波形为对象,建立单音干扰下的链路传输模型,分析单音干扰频率、相位和功率等参数对链路传输性能恶化程度的影响,理论推导链路传输误码率与频率差、信干比之间的闭合数学关系式。通过不同单音干扰条件下的卫星通信物理层链路传输性能仿真,得到误码率随频率差和信干比的变化曲线。理论分析和仿真结果表明,当频率差趋近于0时单音干扰对链路性能恶化最为严重,为后续规避和抑制单音干扰奠定了坚实基础。Considering the common single-tone interference in satellite communication link,the study focuses on the typical physical layer transmission waveform of satellite communications.Firstly,the model of transmission link with single-tone interference is established,and then the effect of single-tone parameters,including frequency,phase and power,on the transmission performance of the link is analyzed.Furthermore,the closed mathematic expression of relationship between bit error rate and single-tone frequency offset as well as the signal-to-interference ratio(SIR)is derived in theory.Finally,the bit error rate curves corresponding to different single-tone frequency values and SIR values are achieved by simulation in various interference conditions.The theoretical analysis and simulation results indicate that the performance of communication link would deteriorate seriously when the frequency offset is approaching 0,which can support suppression of single-tone interference for satellite communication.

关 键 词：卫星通信 单音干扰 信干比 频率差 误码率 

分 类 号：TN911[电子电信—通信与信息系统]