| 摘要: |
| 在论述L阵干涉仪和圆阵相关法测向体制误差形成的基础上，基于电磁波传播的多
径效应，建立了地空无线链路四径传输模型，并将单个多径分量用时延相同的多径簇来描述
，分析了多径分量和多径簇对单个天线接收信号相位和不同天线接收信号互相关系数造成的
影响。仿真结果表明，多径条件下接收信号的波形、频谱和相位谱较直射信号都将发生显
著的变化，多径效应对俯仰角造成的测量误差要大于对方位角造成的测量误差。 |
| 关键词: 测向 多径效应 天线相关性 相位误差 |
| DOI： |
|
| 基金项目: |
|
| Influence of Multipath Effect on Signal Receiving and Direction Finding |
| MAO Hu,YANG Jian-bo,QIU Hong-kun |
| (Aviation University of Air Force，Changchun 130022，China) |
| Abstract: |
| Through analysing the direction finding(DF) error of phase interferometer by
L array and correlation method by circular array, the airg
round channel multipath transmission fourray model is established, and single
multipath ray
i
s described by the same timedelay multipath clusters.The influence of multipat
h ray and multip
a
th clusters on the phase of singleantenna receiving signal and c
r
osscorrelation coefficient of multiantennas receiving signal is analysed. Th
e
simulation results show that waveform, frequency spectrum and phase of receiving
si
gnal change remarkably compared with direct transmission signal in the multipath
condition, and the measurement error of pitch angle caused by multipath effect i
s larger than that of azimuth. |
| Key words: direction finding multipath effect antenna correlation characteristic phase
error |
《电讯技术》编辑部 