本文關(guān)鍵詞： 綜合電子系統(tǒng) 一體化 線性調(diào)頻干擾 多音干擾 數(shù)字射頻存儲(chǔ)器 快速獨(dú)立分量分析　出處：《哈爾濱工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在信息化戰(zhàn)爭(zhēng)中，通信、雷達(dá)偵察一體化和干擾一體化屬于綜合電子系統(tǒng)范疇，通過一體化可以提高裝備的效能。在一定的物理載荷限制條件下，一體化裝備可以根據(jù)作戰(zhàn)任務(wù)的改變，靈活地重配置和自適應(yīng)，這具有很重要的實(shí)際意義。本文設(shè)計(jì)了一個(gè)綜合電子系統(tǒng)，并對(duì)其一體化過程中的關(guān)鍵技術(shù)展開了研究，在此基礎(chǔ)上完成該綜合電子系統(tǒng)的一體化仿真。 首先，結(jié)合本課題所針對(duì)的目標(biāo)對(duì)象的特性，分析了通信系統(tǒng)、雷達(dá)系統(tǒng)及各自的干擾系統(tǒng)之間的異同，在硬件系統(tǒng)寬帶設(shè)計(jì)的基礎(chǔ)上，通過軟件無線電和系統(tǒng)軟硬件重構(gòu)技術(shù)，論述了上述電子系統(tǒng)綜合一體化的可能性。在此基礎(chǔ)上，完成了綜合電子系統(tǒng)的設(shè)計(jì)，為后文的研究奠定了基礎(chǔ)。 其次，選取了某通信數(shù)據(jù)鏈作為研究對(duì)象，搭建該通信系統(tǒng)，搭建后的系統(tǒng)可稱為軟擴(kuò)頻跳頻系統(tǒng)。該通信系統(tǒng)在誤比特率指標(biāo)0.1的情況下，系統(tǒng)所能忍受的信噪比SNR在-20dB以下。針對(duì)該軟擴(kuò)頻跳頻通信系統(tǒng)，采用了基于線性調(diào)頻干擾樣式和多音干擾樣式的寬帶阻塞式干擾技術(shù)。實(shí)驗(yàn)結(jié)果表明，分頻段瞄準(zhǔn)線性調(diào)頻干擾樣式達(dá)到0.1的誤比特率指標(biāo)所需信干比SJR約-8dB；多音干擾樣式達(dá)到0.1的誤比特率指標(biāo)所需信干比SJR約-10dB，并且干擾信道數(shù)為10左右的干擾性能最佳，干擾頻偏應(yīng)選為0.25MHz或1.25MHz�；谠撥洈U(kuò)頻跳頻通信系統(tǒng)的寬帶阻塞式干擾技術(shù)，綜合電子系統(tǒng)可以實(shí)現(xiàn)對(duì)類似通信系統(tǒng)的有效對(duì)抗。 然后，選取某線性調(diào)頻脈沖壓縮體制雷達(dá)作為研究對(duì)象，結(jié)合該雷達(dá)工作方式的特點(diǎn)，采用了基于數(shù)字射頻存儲(chǔ)器的移頻轉(zhuǎn)發(fā)干擾樣式和間歇采樣轉(zhuǎn)發(fā)干擾樣式。實(shí)驗(yàn)結(jié)果表明，經(jīng)過幅度加權(quán)的移頻轉(zhuǎn)發(fā)干擾樣式的幅度可識(shí)別特征得到了弱化，并可產(chǎn)生空間位置超前和滯后假目標(biāo)；間歇采樣轉(zhuǎn)發(fā)干擾在不移頻的情況下可在一定距離范圍內(nèi)產(chǎn)生空間位置超前和滯后假目標(biāo)；兩者結(jié)合，可產(chǎn)生大量逼真的空間位置超前和滯后假目標(biāo)。該基于數(shù)字射頻存儲(chǔ)器的線性調(diào)頻脈沖壓縮體制雷達(dá)的干擾技術(shù)，作為綜合電子系統(tǒng)關(guān)鍵技術(shù)之一，并為后續(xù)的一體化仿真提供了基礎(chǔ)。 最后，針對(duì)同頻段信號(hào)分離問題，本文引入了基于快速獨(dú)立分量分析算法的盲源分離技術(shù)。實(shí)驗(yàn)結(jié)果表明，該技術(shù)能很好地將硬件濾波器無法分離的同頻段通信、雷達(dá)混合信號(hào)進(jìn)行分離，算法收斂概率為92.3%；通過頻譜偏斜度可以正確識(shí)別信號(hào)分離結(jié)果，解決了獨(dú)立分量分析算法信號(hào)分離次序不唯一而帶來的信號(hào)識(shí)別問題。在此基礎(chǔ)上，進(jìn)行了綜合電子系統(tǒng)一體化綜合仿真，，驗(yàn)證了本文所設(shè)計(jì)的綜合電子系統(tǒng)的合理性和可行性。
[Abstract]:In the information war, the integration of communication, radar reconnaissance and jamming belongs to the category of integrated electronic system, through which the efficiency of equipment can be improved. Integrated equipment can be reconfigured and adapted flexibly according to the change of operational tasks, which is of great practical significance. In this paper, an integrated electronic system is designed, and the key technologies in the process of integration are studied. On this basis, the integrated simulation of the integrated electronic system is completed. Firstly, according to the characteristics of the target object, the similarities and differences among communication system, radar system and their jamming system are analyzed, and on the basis of the broadband design of hardware system, the paper analyzes the differences and similarities between the communication system, the radar system and their respective jamming systems. Through the software radio and software / hardware reconfiguration technology, the possibility of the integration of the electronic system mentioned above is discussed, and the design of the integrated electronic system is completed, which lays a foundation for the later research. Secondly, a communication data link is selected as the research object, and the communication system can be called soft spread spectrum frequency hopping system. The signal-to-noise ratio (SNR) of the system is below -20dB. For the soft spread spectrum hopping communication system, a wideband blocking jamming technique based on LFM jamming and multi-tone jamming is adopted. The experimental results show that, The signal-to-interference ratio (SJR) is about -8dB for aiming at the error bit rate (BER) of 0.1 and SJR is about -10dB for multi-tone jamming, and the interference performance is the best when the number of interference channels is about 10. The interference frequency offset should be chosen as 0.25 MHz or 1.25 MHz. Based on the wideband blocking jamming technology of the soft spread spectrum hopping communication system, the integrated electronic system can effectively resist the similar communication system. Then, a linear frequency modulation pulse compression radar is selected as the research object. The frequency shift and forward jamming mode based on digital RF memory and the intermittent sampling forward jamming mode are adopted. The experimental results show that the amplitude recognizable feature of the amplitude weighted frequency shift forward interference pattern is weakened. In addition, spatial position lead and lag false target can be produced, intermittent sampling and forwarding interference can produce space position lead and lag false target in a certain range of distance without frequency shift. The jamming technology of LFM pulse compression radar based on digital RF memory is one of the key technologies of integrated electronic system. And provides the foundation for the subsequent integrated simulation. Finally, a blind source separation technique based on fast independent component analysis (FICA) algorithm is introduced to solve the problem of signal separation in the same frequency band. The experimental results show that this technique can communicate well with the same frequency band where the hardware filter can not be separated. The convergence probability of radar mixed signal is 92.3. The result of signal separation can be correctly identified by spectrum deflection, which solves the problem of signal recognition caused by the non-unique signal separation order of independent component analysis (ICA) algorithm. The rationality and feasibility of the integrated electronic system designed in this paper are verified.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN972

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