空时极化抗干扰算法研究
发布时间：2018-08-24 11:37
【摘要】：干扰抑制一直是导航接收机尤为重要的环节,已经有了较长时间的研究历史,有一些比较经典的方法,比如频域、空域、空时域抗干扰的处理方法,这些抗干扰技术都是以标量传感器为接收阵元实现的。而电磁波的完备信息需要由电场和磁场来共同描述,电磁矢量传感器能够完成电磁波完备信息的接收,它能够获取电磁波极化域信息,由二分量电磁矢量传感器构成的极化敏感阵列,使信号处理过程能够利用极化域信息进行抗干扰处理,提高了抗干扰性能。本文针对基于电磁矢量传感器的导航抗干扰算法主要做了以下几个方面的研究:1.对基于单电磁矢量传感器的抗干扰算法进行了性能分析,并与环状拉伸式单电磁矢量传感器的抗干扰性能进行对比。环状拉伸式单电磁矢量传感器是为了减小极子间的耦合效应而研究的特殊阵型,它保证了六分量的完备性,同时又符合导航接收机中对接收天线尺寸的限制,空间上的分离使天线孔径增加,因此抗干扰性能也提高了。2.在极化敏感阵列基础上,论文开展了极化空域的抗干扰算法研究与性能分析。相对于空域抗干扰,极化空域抗干扰在干扰与信号的空间位置接近时仍能保持很好的抗干扰性能,扩展了阵列抗干扰的应用场景。3.基于极化敏感阵列的空时极化联合抗干扰,充分利用了信号的时域、空域、极化域信息,属于空时抗干扰与极化空域抗干扰的延伸,实现了多维域抗干扰,在极化空域抗干扰基础上有了进一步性能提升。为了详尽的描述每个电磁矢量传感器的二分量之间的正交关系,本论文用四元数来构建每个阵元接收到的信号模型,实现四元数域内空时极化联合抗干扰算法,与复数域内的空时联合极化抗干扰算法相比,该方法保证抗干扰性能的同时,降低了空时极化联合抗干扰的运算量。
[Abstract]:Interference suppression has been a very important part of the navigation receiver. It has been studied for a long time. There are some classical methods, such as frequency domain, space-time domain anti-jamming method. These anti-jamming techniques are realized by using scalar sensor as the receiving array element. The complete information of electromagnetic wave needs to be described by electric field and magnetic field. The electromagnetic vector sensor can receive the complete information of electromagnetic wave, and it can obtain the information of polarization domain of electromagnetic wave. The polarization sensitive array composed of two-component electromagnetic vector sensor makes the signal processing process use polarization domain information for anti-interference processing and improves the anti-jamming performance. In this paper, the navigation anti-jamming algorithm based on electromagnetic vector sensor is studied in the following aspects: 1. The performance of anti-jamming algorithm based on single electromagnetic vector sensor is analyzed and compared with that of circular stretch single electromagnetic vector sensor. The circular stretch single electromagnetic vector sensor is a special array which is studied to reduce the coupling effect between the poles. It ensures the completeness of the six components and meets the limits of the size of the receiving antenna in the navigation receiver at the same time. The separation in space increases the aperture of the antenna, so the anti-jamming performance is improved by. 2. 2. On the basis of polarization-sensitive array, the anti-jamming algorithm and performance analysis in polarimetric spatial domain are carried out in this paper. Compared with spatial anti-jamming, polarimetric spatial anti-jamming can maintain good anti-jamming performance when the interference is close to the spatial position of the signal, which extends the application scenario of array anti-jamming. Space-time polarization combined anti-jamming based on polarization-sensitive array makes full use of signal information in time domain, spatial domain and polarization domain. It belongs to the extension of space-time anti-jamming and polarization space-domain anti-jamming, and realizes multi-dimensional anti-jamming. On the basis of polarimetric spatial anti-jamming, the performance is further improved. In order to describe the orthogonal relation between the two components of each electromagnetic vector sensor in detail, this paper uses quaternion to construct the signal model received by each array element, and realizes the combined anti-jamming algorithm of space-time polarization in quaternion domain. Compared with the space-time joint polarization anti-jamming algorithm in complex domain, this method guarantees the anti-jamming performance and reduces the computation cost of the space-time polarization joint anti-jamming algorithm.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN965.5;TN973
本文编号：2200707
[Abstract]:Interference suppression has been a very important part of the navigation receiver. It has been studied for a long time. There are some classical methods, such as frequency domain, space-time domain anti-jamming method. These anti-jamming techniques are realized by using scalar sensor as the receiving array element. The complete information of electromagnetic wave needs to be described by electric field and magnetic field. The electromagnetic vector sensor can receive the complete information of electromagnetic wave, and it can obtain the information of polarization domain of electromagnetic wave. The polarization sensitive array composed of two-component electromagnetic vector sensor makes the signal processing process use polarization domain information for anti-interference processing and improves the anti-jamming performance. In this paper, the navigation anti-jamming algorithm based on electromagnetic vector sensor is studied in the following aspects: 1. The performance of anti-jamming algorithm based on single electromagnetic vector sensor is analyzed and compared with that of circular stretch single electromagnetic vector sensor. The circular stretch single electromagnetic vector sensor is a special array which is studied to reduce the coupling effect between the poles. It ensures the completeness of the six components and meets the limits of the size of the receiving antenna in the navigation receiver at the same time. The separation in space increases the aperture of the antenna, so the anti-jamming performance is improved by. 2. 2. On the basis of polarization-sensitive array, the anti-jamming algorithm and performance analysis in polarimetric spatial domain are carried out in this paper. Compared with spatial anti-jamming, polarimetric spatial anti-jamming can maintain good anti-jamming performance when the interference is close to the spatial position of the signal, which extends the application scenario of array anti-jamming. Space-time polarization combined anti-jamming based on polarization-sensitive array makes full use of signal information in time domain, spatial domain and polarization domain. It belongs to the extension of space-time anti-jamming and polarization space-domain anti-jamming, and realizes multi-dimensional anti-jamming. On the basis of polarimetric spatial anti-jamming, the performance is further improved. In order to describe the orthogonal relation between the two components of each electromagnetic vector sensor in detail, this paper uses quaternion to construct the signal model received by each array element, and realizes the combined anti-jamming algorithm of space-time polarization in quaternion domain. Compared with the space-time joint polarization anti-jamming algorithm in complex domain, this method guarantees the anti-jamming performance and reduces the computation cost of the space-time polarization joint anti-jamming algorithm.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN965.5;TN973
【参考文献】
相关期刊论文 前1条
1 刘勇;徐振海;肖顺平;;阵列互耦对极化敏感阵列滤波性能的影响[J];电子学报;2006年12期
，本文编号：2200707
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