摘要
移动通信基站的下行信号会影响UHF波段雷达的目标探测和跟踪,开展基站干扰环境的极化特性测量与分析,是利用极化处理手段对抗此类干扰的基础和依据。该文首先建立了UHF波段双极化雷达对基站信号接收模型,推导了极化比和极化度估计量的概率密度函数用以表征干扰环境极化统计特性;而后分别开展了对单个基站和多个基站的雷达外场接收测量试验,实验结果说明了确定性描述方法仅适用于表征极化度较高的单个基站信号,对多基站或极化度较低的情形则不再适用。通过实测数据与理论模型的拟合验证了该文给出的统计模型在描述两种场景下干扰信号统计特性上的正确性和适用性。
Radar detection and tracking performance in the UHF-band can be influenced by the downlink signals of communication base stations. The polarimetric properties of interference from base stations are measured and analyzed as a basis for suppressing this type of interference by a polarization processing method. In this study, we establish signal models from the base station for dual-polarization UHF-band radar. We express the Probability Density Functions （PDF） of the estimated polarization ratio and degree of polarization in a closed form and use them to describe the statistical properties of the interference environment. We developed polarimetric radar reception experiments for the signals from both Single-Base Stations （SBS） and Multi-Base Stations （MBS）. Experimental results proved that deterministic polarized descriptions are appropriate only for signals from SBS but not from MBS or from stations with a low DoP （Degree of Polarization）. However, the proposed statistical method can be used to describe both SBS and MBS cases, which we demonstrated by comparing the theoretical models with real measurement data.
出处
《雷达学报（中英文）》
CSCD
2016年第2期164-173,共10页
Journal of Radars
基金
国家自然科学基金(61490692
61201336)~~
关键词
极化雷达
极化度
通信基站
电磁环境测量
Polarimetric radar
Degree of polarization
Communication base stations
Measurement of electromagnetic environment
