【摘要】：隨著現(xiàn)代戰(zhàn)爭(zhēng)的日益信息化發(fā)展,現(xiàn)代電子信息戰(zhàn)成為戰(zhàn)爭(zhēng)中的重要組成部分。IFF(敵我識(shí)別)系統(tǒng)已經(jīng)成為了現(xiàn)代電子戰(zhàn)爭(zhēng)中的不可缺少的部分。從二十世紀(jì)開始,隨著遠(yuǎn)程武器在戰(zhàn)場(chǎng)中使用,對(duì)己方人員的誤傷就不斷的出現(xiàn),各個(gè)國家開始注意到敵我識(shí)別的重要性。西方國家最開始對(duì)敵我識(shí)別進(jìn)行研究,從最開始的M1、M2、M3、MC模式發(fā)展到如今的M4、M5模式。而其中M5模式是目前北約使用的最新的敵我識(shí)別系統(tǒng),與前幾代敵我識(shí)別系統(tǒng)相比,它具有更好的保密性好、作用的距離更遠(yuǎn)以及更高的識(shí)別概率等優(yōu)點(diǎn)。本文針對(duì)西方的M5模式,對(duì)M5模式中應(yīng)答接收機(jī)進(jìn)行研究與設(shè)計(jì),分別在MATLAB平臺(tái)以及ISE平臺(tái)進(jìn)行仿真并實(shí)現(xiàn),本文的研究工作主要有以下幾個(gè)部分:首先,本文研究了M5模式的工作原理以及相關(guān)的工作模式,分析了M5模式下的詢問信號(hào)格式以及應(yīng)答信號(hào)格式,同時(shí)對(duì)詢問信號(hào)以及應(yīng)答信號(hào)的產(chǎn)生流程進(jìn)行了研究。對(duì)M5模式中涉及到的基帶信號(hào)算法進(jìn)行研究,從RS編碼到Walsh擴(kuò)頻,再到MSK調(diào)制解調(diào)等相關(guān)算法。RS編碼以及Walsh擴(kuò)頻的使用,使得M5模式具有更強(qiáng)的容錯(cuò)能力以及更遠(yuǎn)的識(shí)別距離,與前一代敵我識(shí)別M4模式中PSK調(diào)制方式相比,MSK調(diào)制的方式能在相同符號(hào)率的情況下占據(jù)更小的頻帶,提高了頻譜利用率。然后,對(duì)IFF接收機(jī)進(jìn)行設(shè)計(jì)仿真。針對(duì)M5模式工作方式中MSK信號(hào)是窄脈沖的情況,根據(jù)過零檢測(cè)法,提出了一種基于CORDIC算法的鑒相求頻解調(diào)方法,并在matlab平臺(tái)與ISE平臺(tái)上仿真驗(yàn)證;而當(dāng)敵我識(shí)別器工作在數(shù)據(jù)傳輸模式下,利用相干解調(diào)的方法往往能夠得到更好的效果,在matlab平臺(tái)上對(duì)幾種相干解調(diào)的方法進(jìn)行仿真和性能對(duì)比,然后在ISE平臺(tái)上對(duì)平方環(huán)解調(diào)方法進(jìn)行了仿真與驗(yàn)證。最后,在對(duì)應(yīng)答接收機(jī)進(jìn)行大量仿真的基礎(chǔ)上,對(duì)電路進(jìn)行設(shè)計(jì)。電路中ADC芯片采用AD9265,提供80MHz的采樣率。對(duì)模擬中頻信號(hào)為70MHz的MSK信號(hào)進(jìn)行采樣得到數(shù)字信號(hào),再經(jīng)過數(shù)字下變頻之后,基于CORDIC算法的鑒相求頻方法,基于FPGA的平臺(tái)對(duì)基帶信號(hào)處理,利用非相干解調(diào)的方法對(duì)MSK信號(hào)進(jìn)行解調(diào),在信噪比為15dB的條件下,誤碼率接近理論值。
[Abstract]:With the development of modern war information, modern electronic information warfare has become an important part of the war,. IFF (identification) system has become an indispensable part of modern electronic warfare. Since the beginning of the twentieth century, with the use of long-range weapons in the battlefield, the accidental injury to their own personnel has been emerging, and each country has begun to pay attention to the importance of the identification of the enemy and the self. The western countries began to study the identification of foe and foe, from the initial M1M2M3M3 MC model to the present M4 / M5 model. The M5 pattern is the newest identification system used by NATO at present. Compared with the previous generation of identification system, M5 pattern has the advantages of better confidentiality, longer distance and higher recognition probability. Aiming at the western M5 mode, this paper studies and designs the answering receiver in M5 mode, and simulates and implements it on MATLAB platform and ISE platform respectively. The research work of this paper mainly includes the following parts: first, In this paper, the working principle of M5 mode and its related working modes are studied, and the format of interrogation signal and response signal in M5 mode are analyzed. At the same time, the generating process of challenge signal and response signal is studied. The base-band signal algorithms involved in M5 mode are studied, from RS coding to Walsh spread spectrum, and then to MSK modulation and demodulation algorithms. RS coding and the use of Walsh spread spectrum, The M5 mode has stronger fault-tolerant ability and longer recognition distance. Compared with the PSK modulation in the previous generation of M4 mode, the MSK modulation can occupy a smaller frequency band at the same symbol rate. The spectrum efficiency is improved. Then, the IFF receiver is designed and simulated. In view of the situation that the MSK signal is a narrow pulse in M5 mode, a phase demodulation method based on CORDIC algorithm is proposed according to the zero-crossing detection method, and simulated on matlab platform and ISE platform. When the foe / I recognizer works in the data transmission mode, the method of coherent demodulation can get better results. The simulation and performance comparison of several coherent demodulation methods are carried out on the matlab platform. Then the square loop demodulation method is simulated and verified on ISE platform. Finally, the circuit is designed based on the simulation of the transponder. In the circuit, ADC chip uses AD9265, to provide the sampling rate of 80MHz. The digital signal is obtained by sampling the MSK signal whose analog intermediate frequency signal is 70MHz. After digital downconversion, the method of phase identification and frequency finding based on CORDIC algorithm is used to process the baseband signal based on the platform of FPGA. The non-coherent demodulation method is used to demodulate the MSK signal. When the SNR is 15dB, the bit error rate is close to the theoretical value.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TJ5;TN97

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李維科;;基于時(shí)域和編碼特征的Mark XIIA IFF信號(hào)識(shí)別方法[J];兵器裝備工程學(xué)報(bào);2016年07期

2 朱棟;劉姝含;王壽峰;榮振宇;;窄脈沖MSK信號(hào)數(shù)字解調(diào)設(shè)計(jì)與實(shí)現(xiàn)[J];指揮信息系統(tǒng)與技術(shù);2016年02期

3 曾裕;;RS編碼在移動(dòng)通信中的應(yīng)用及性能分析[J];山東工業(yè)技術(shù);2015年16期

4 趙峙岳;蒲紅平;劉小鈴;;Mark XIIA IFF系統(tǒng)中頻數(shù)字接收機(jī)設(shè)計(jì)與仿真[J];火力與指揮控制;2015年02期

5 龍慧敏;;基于時(shí)域調(diào)制域特征的IFF模式5信號(hào)識(shí)別[J];電訊技術(shù);2014年07期

6 邴雨晨;楊建波;關(guān)春健;;Mark XIIA Mode 5 信號(hào)加密處理研究[J];航天電子對(duì)抗;2013年06期

7 鄒世源;劉久文;陽輝;;數(shù)字域校正零中頻發(fā)射機(jī)IQ不平衡的研究[J];電視技術(shù);2013年23期

8 吳靜;王洪;汪學(xué)剛;;機(jī)場(chǎng)跑道異物監(jiān)測(cè)雷達(dá)的雜波圖恒虛警率檢測(cè)[J];計(jì)算機(jī)應(yīng)用;2013年11期

9 關(guān)春健;楊建波;劉鵬;;Mark XIIA Mode 5系統(tǒng)中的MSK技術(shù)應(yīng)用[J];通信技術(shù);2012年08期

10 關(guān)春健;楊建波;劉鵬;;MARK XIIA Mode V詢問和應(yīng)答過程研究[J];數(shù)字通信;2012年02期

相關(guān)碩士學(xué)位論文 前5條

1 茍力;基于FPGA的高速DDS關(guān)鍵技術(shù)研究[D];電子科技大學(xué);2016年

2 歐陽超;西方體制敵我識(shí)別器基帶信號(hào)處理算法研究及實(shí)現(xiàn)[D];電子科技大學(xué);2015年

3 郭恒;多目標(biāo)模擬IFF信號(hào)源—基帶信號(hào)生成單元系統(tǒng)設(shè)計(jì)[D];電子科技大學(xué);2014年

4 趙雪;MSK信號(hào)的調(diào)制與解調(diào)[D];北京郵電大學(xué);2013年

5 唐良偉;MSK數(shù)字調(diào)制解調(diào)及其實(shí)現(xiàn)技術(shù)研究[D];電子科技大學(xué);2007年

，

本文編號(hào)：2306747