多目标的DBF干扰发射技术研究
发布时间：2018-08-02 08:00
【摘要】：现代电子战的电磁环境日益复杂,为保证己方安全,干扰机需要同时对多个威胁源实施干扰措施。由于对不同的威胁源需要释放不同的干扰信号,因此干扰机必须可以同时释放多种干扰信号。为了不暴露己方信息,在实施干扰措施时,一般希望只向威胁源发射与之相应的干扰信号。为满足以上要求,干扰机必须具备干扰信号合成的能力,且具备定向发射信号的能力。因此本文主要讨论干扰信号合成和数字波束形成。本文首先讨论了阵列天线形成波束的原理,研究了各种阵列天线模型的特点,分析了阵列天线形成波束的特性。然后在阵列天线原理的基础上,进一步讨论了数字波束形成。并且探讨了如何通过数字信号处理优化波束性能,控制波束形状。结合数字信号处理和阵列天线实现了定向发射波束的要求。之后论述了数字干扰信号合成的基本过程,并着重讨论了合成干扰信号的峰均比分布,并提出了分别针对压制干扰信号和欺骗干扰信号的降低峰均比的技术。由于发射数字波束信号需要将信号功率放大再发射,因此接下来研究了功率放大器的非线性特性对波束性能的影响以及对干扰信号的影响。最后讨论了幅相误差对数字波束形成的影响,提出了校正幅相误差的方案。
[Abstract]:The electromagnetic environment of modern electronic warfare (EW) is becoming more and more complex. In order to ensure the safety of its own, the jammer needs to carry out jamming measures to multiple threat sources simultaneously. Since different threat sources need to release different jamming signals, the jammer must be able to release multiple jamming signals at the same time. In order not to expose our own information, we usually hope to transmit only the corresponding jamming signal to the threat source when implementing the jamming measures. In order to meet the above requirements, the jammer must have the ability of jamming signal synthesis and directional transmission signal. Therefore, this paper mainly discusses interference signal synthesis and digital beamforming. This paper first discusses the principle of array antenna beamforming, studies the characteristics of various array antenna models, and analyzes the characteristics of array antenna beamforming. Then digital beamforming is discussed on the basis of array antenna principle. And how to optimize the beam performance and control the beam shape by digital signal processing is discussed. Combined with digital signal processing and array antenna, the requirements of directional transmitting beam are realized. After that, the basic process of digital jamming signal synthesis is discussed, and the PAPR distribution of synthesized jamming signal is emphatically discussed, and the technology of reducing PAPR for suppressing jamming signal and deceiving jamming signal is put forward respectively. Since it is necessary to amplify and retransmit the signal power when transmitting the digital beam signal, the influence of the nonlinear characteristics of the power amplifier on the beam performance and the interference signal is studied. Finally, the effect of amplitude-phase error on digital beamforming is discussed, and a scheme for correcting amplitude-phase error is proposed.
【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】：TN972
本文编号：2158735
[Abstract]:The electromagnetic environment of modern electronic warfare (EW) is becoming more and more complex. In order to ensure the safety of its own, the jammer needs to carry out jamming measures to multiple threat sources simultaneously. Since different threat sources need to release different jamming signals, the jammer must be able to release multiple jamming signals at the same time. In order not to expose our own information, we usually hope to transmit only the corresponding jamming signal to the threat source when implementing the jamming measures. In order to meet the above requirements, the jammer must have the ability of jamming signal synthesis and directional transmission signal. Therefore, this paper mainly discusses interference signal synthesis and digital beamforming. This paper first discusses the principle of array antenna beamforming, studies the characteristics of various array antenna models, and analyzes the characteristics of array antenna beamforming. Then digital beamforming is discussed on the basis of array antenna principle. And how to optimize the beam performance and control the beam shape by digital signal processing is discussed. Combined with digital signal processing and array antenna, the requirements of directional transmitting beam are realized. After that, the basic process of digital jamming signal synthesis is discussed, and the PAPR distribution of synthesized jamming signal is emphatically discussed, and the technology of reducing PAPR for suppressing jamming signal and deceiving jamming signal is put forward respectively. Since it is necessary to amplify and retransmit the signal power when transmitting the digital beam signal, the influence of the nonlinear characteristics of the power amplifier on the beam performance and the interference signal is studied. Finally, the effect of amplitude-phase error on digital beamforming is discussed, and a scheme for correcting amplitude-phase error is proposed.
【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】：TN972
【参考文献】
相关期刊论文 前1条
1 恽建波;朱云鹏;靳学明;;密集假目标干扰的峰均比改善方法[J];舰船电子对抗;2012年02期
，本文编号：2158735
本文链接：https://www.wllwen.com/kejilunwen/wltx/2158735.html
