發(fā)布時間：2018-11-15 20:22

【摘要】：面對不斷惡化的電磁環(huán)境,多輸入多輸出(MIMO)雷達的觀念應運而生。MIMO雷達因其采用多發(fā)多收的工作模式,具有抗截獲能力強、布陣方式靈活、抗干擾能力強等諸多優(yōu)點,受到了更多地關注。由于MIMO雷達的諸多優(yōu)點,導致其可能成為未來戰(zhàn)爭的主流,因此國內(nèi)外已開始研究針對這種新體制雷達的對抗方法。首先根據(jù)MIMO體制雷達的結構特點,研究其可能存在的易受干擾薄弱環(huán)節(jié),之后針對這些薄弱環(huán)節(jié),采取相應的干擾策略以在偵察條件不完備的情況下實現(xiàn)對MIMO雷達的高效干擾。本文主要工作是在偵察信息非完備的情況下實現(xiàn)MIMO雷達的干擾。首先介紹了該新體制雷達的結構特點,之后從MIMO雷達信號處理流程出發(fā),分析了分布式MIMO雷達存在的易受干擾薄弱環(huán)節(jié)及非完備信息的特點。在此基礎上,研究了針對分布式MIMO雷達非完備信息的干擾方法,通過理論推導和仿真結果證明了各干擾方法的有效性。本文的主要研究內(nèi)容如下:1.研究分布式MIMO雷達的結構特點和信號處理流程,比較分布式MIMO雷達與集中式MIMO雷達的區(qū)別,為分析其易受干擾薄弱環(huán)節(jié)奠定理論基礎。2.分析分布式MIMO雷達存在的弱點,如長時間非相參積累,發(fā)射信號功率低,分辨能力依賴發(fā)射波形正交性,接收端需要進行數(shù)據(jù)融合等,為進一步研究分布式MIMO雷達干擾方法提供思路。3.分析分布式MIMO雷達在信號調(diào)制類型信息不完備的情況下,如何制定有效的干擾策略及具體干擾方法的實施。研究了多信號干擾和壓制性干擾方法,并仿真驗證其干擾效果。4.分析分布式MIMO雷達在信號載波數(shù)信息不完備的情況下,如何制定有效的干擾策略及具體干擾方法的實施。研究了部分載波的壓制干擾和欺騙干擾對分布式MIMO雷達的影響,并提出了分布式干擾和距離欺騙組合干擾,并對其進行仿真驗證。5.分析分布式MIMO雷達在信號載頻、帶寬等信息不完備的情況下,如何制定有效的干擾策略及具體干擾方法的實施。主要研究了分階段組合干擾,并對其進行仿真驗證。
[Abstract]:In the face of the deteriorating electromagnetic environment, the concept of multi-input and multi-output (MIMO) radar emerges as the times require. MIMO radar has many advantages, such as strong anti-interception ability, flexible array arrangement, strong anti-jamming ability and so on. Got more attention. Due to many advantages of MIMO radar, it may become the mainstream of future war. Therefore, the countermeasures against this new radar system have been studied at home and abroad. According to the structural characteristics of MIMO radar, the possible weak links of MIMO radar are studied, and then the corresponding jamming strategy is adopted to realize the efficient jamming of MIMO radar under the condition of incomplete reconnaissance conditions. The main work of this paper is to realize the jamming of MIMO radar with incomplete reconnaissance information. This paper first introduces the structural characteristics of the new radar system, and then analyzes the weak links of the distributed MIMO radar and the characteristics of incomplete information based on the signal processing flow of the MIMO radar. On this basis, the jamming methods for incomplete information of distributed MIMO radar are studied, and the effectiveness of each jamming method is proved by theoretical derivation and simulation results. The main contents of this paper are as follows: 1. This paper studies the structural characteristics and signal processing flow of distributed MIMO radar, compares the difference between distributed MIMO radar and centralized MIMO radar, and lays a theoretical foundation for analyzing the weak links of distributed MIMO radar vulnerable to jamming. 2. The weakness of distributed MIMO radar is analyzed, such as long time non-coherent accumulation, low power of transmitting signal, dependence of resolution on orthogonality of transmitting waveform, data fusion at receiving end, etc. For further study of distributed MIMO radar jamming methods. 3. This paper analyzes how to make effective jamming strategy and how to implement the jamming method of distributed MIMO radar under the condition of incomplete signal modulation type information. The methods of multi-signal jamming and suppressing jamming are studied, and the jamming effect is verified by simulation. 4. This paper analyzes how to make effective jamming strategy and how to implement the concrete jamming method of distributed MIMO radar under the condition of incomplete signal carrier number information. The influence of partial carrier suppression jamming and deceptive jamming on distributed MIMO radar is studied, and the combined jamming of distributed jamming and range deception is proposed. This paper analyzes how to formulate an effective jamming strategy and how to implement the jamming method of distributed MIMO radar under the condition of incomplete signal carrier frequency, bandwidth and other information. This paper mainly studies the phased combined interference, and carries on the simulation verification to it.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN974

【引證文獻】

相關碩士學位論文 前1條

1 姚君宇;MIMO雷達干擾策略與方法研究[D];電子科技大學;2018年

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本文編號：2334349