论文标题
基于单 - 安德滕纳的GPS抗炎方法利用了极化多样性
Single-Antenna-Based GPS Antijamming Method Exploiting Polarization Diversity
论文作者
论文摘要
全球定位系统（GPS）接收器对干扰者的脆弱性是由于GPS的信号功率极为弱的主要问题。已经对各种天线阵列技术进行了研究，以用作与GPS干扰器的对策，并且已知它们的抗炎性能大于单个天线方法。但是，由于天线阵列的大小，成本和计算复杂性，天线阵列的应用仍然有限。这项研究提出并在实验上验证了新型的时空偏振域自适应处理，以通过重点关注双极化天线的极化多样性，以实现单元素双极化天线（STPAP）。得出了双极天线接收到的任意极化信号的数学模型，并建议针对基于双偏置的基于 - 安滕纳的GPS antijam一个适当的约束矩阵。为了降低约束矩阵方法的计算复杂性，采用了特征向量约束设计方案。通过实验进行定量和定性评估STPAP的性能，如下所示。 1）在合成干扰下，STPAP的载体密度比（C/N0）高于先前的最小平均误差（MMSE）或最小无变形响应（MVDR）基于双偏置的天线方法的载体。 2）与以前的单元素双极化天线方法相比，STPAP的优点和劣势是与MMSE或MVDR算法的前一个单元素双极化天线方法相比。 3）将STPAP的特征（就GPS和Camping信号的方向和极化而言）与常规的两元素单极化天线阵列方法进行了比较，该方法具有与STPAP的自由度相同的自由度。
The vulnerability of Global Positioning System (GPS) receivers to jammers is a major concern owing to the extremely weak received signal power of GPS. Researches have been conducted on a variety of antenna array techniques to be used as countermeasures to GPS jammers, and their antijamming performance is known to be greater than that of single antenna methods. However, the application of antenna arrays remains limited because of their size, cost, and computational complexity. This study proposes and experimentally validates a novel space-time-polarization domain adaptive processing for a single-element dual-polarized antenna (STPAPS) by focusing on the polarization diversity of a dual-polarized antenna. The mathematical models of arbitrarily polarized signals received by dual-polarized antenna are derived, and an appropriate constraint matrix for dual-polarized-antenna-based GPS antijam is suggested. To reduce the computational complexity of the constraint matrix approach, the eigenvector constraint design scheme is adopted. The performance of STPAPS is quantitively and qualitatively evaluated through experiments as follows. 1) The carrier-to-noise-density ratio (C/N0) of STPAPS under synthetic jamming is demonstrated to be higher than that of the previous minimum mean squared error (MMSE) or minimum variance distortionless response (MVDR) based dual-polarized antenna methods. 2) The strengths and weaknesses of STPAPS are qualitatively compared with those of the previous single-element dual-polarized antenna methods that are not based on the MMSE or MVDR algorithms. 3) The characteristics of STPAPS (in terms of the directions and polarizations of the GPS and jamming signals) are compared with those of the conventional two-element single-polarized antenna array method, which has the same degree of freedom as that of STPAPS.
