【摘要】：現(xiàn)代電子戰(zhàn)的電磁環(huán)境日益復(fù)雜,為保證己方安全,干擾機(jī)需要同時(shí)對(duì)多個(gè)威脅源實(shí)施干擾措施。由于對(duì)不同的威脅源需要釋放不同的干擾信號(hào),因此干擾機(jī)必須可以同時(shí)釋放多種干擾信號(hào)。為了不暴露己方信息,在實(shí)施干擾措施時(shí),一般希望只向威脅源發(fā)射與之相應(yīng)的干擾信號(hào)。為滿足以上要求,干擾機(jī)必須具備干擾信號(hào)合成的能力,且具備定向發(fā)射信號(hào)的能力。因此本文主要討論干擾信號(hào)合成和數(shù)字波束形成。本文首先討論了陣列天線形成波束的原理,研究了各種陣列天線模型的特點(diǎn),分析了陣列天線形成波束的特性。然后在陣列天線原理的基礎(chǔ)上,進(jìn)一步討論了數(shù)字波束形成。并且探討了如何通過數(shù)字信號(hào)處理優(yōu)化波束性能,控制波束形狀。結(jié)合數(shù)字信號(hào)處理和陣列天線實(shí)現(xiàn)了定向發(fā)射波束的要求。之后論述了數(shù)字干擾信號(hào)合成的基本過程,并著重討論了合成干擾信號(hào)的峰均比分布,并提出了分別針對(duì)壓制干擾信號(hào)和欺騙干擾信號(hào)的降低峰均比的技術(shù)。由于發(fā)射數(shù)字波束信號(hào)需要將信號(hào)功率放大再發(fā)射,因此接下來研究了功率放大器的非線性特性對(duì)波束性能的影響以及對(duì)干擾信號(hào)的影響。最后討論了幅相誤差對(duì)數(shù)字波束形成的影響,提出了校正幅相誤差的方案。
[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.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN972

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 惲建波;朱云鵬;靳學(xué)明;;密集假目標(biāo)干擾的峰均比改善方法[J];艦船電子對(duì)抗;2012年02期

，

本文編號(hào)：2158735