【摘要】：近幾十年來，隨著電子技術、信息處理技術的迅速發(fā)展，有關雷達和通信技術的研究也取得了巨大的進步，并廣泛應用于國防和民用領域。在現代電子對抗戰(zhàn)中，作戰(zhàn)平臺對電子設備不斷提出多功能、高穩(wěn)定性要求，傳統(tǒng)單一功能的電子設備面對艱巨的作戰(zhàn)任務和復雜的電磁環(huán)境，已經難以勝任戰(zhàn)時的需求。單靠增加電子設備的種類和數量，不僅帶來巨大的空間和能源的成本損耗，而且加劇電磁環(huán)境的復雜，因此，對于作戰(zhàn)平臺上眾多電子設備綜合一體化的研究應運而生，并成為現代信息技術研究的熱點之一。探索如何在作戰(zhàn)平臺中把功能殊途的電子設備進行整合，以單一電子平臺實現多種功能需求，這不僅提高了設備的靈活性和通用性，而且節(jié)省了空間需求，對于空中作戰(zhàn)平臺，其意義更為重大。 著眼于研究空中作戰(zhàn)平臺背景，在雷達系統(tǒng)中植入通信功能，針對機載脈沖多普勒雷達的工作特點，利用軟件無線電技術實現以雷達系統(tǒng)工作方式的通信，并在USRP(Universal Software Radio Peripheral, USRP)通用的軟件無線電硬件設備上進行實現。此外，由于戰(zhàn)機平臺高速移動的特性，應解決好快速時變的多普勒頻移帶來的影響。 在以雷達方式通信的設計中，首先闡釋國內外在此方面的研究經驗和現狀，結合雷達和通信系統(tǒng)各自結構特點，闡釋利用脈沖多普勒雷達進行數據傳輸的可行性。其次，分析了脈沖多普勒雷達工作方式，設計出適合的一體化信號源，利用雷達脈沖高電平期間加載觸發(fā)脈沖的形式觸發(fā)數據輸出，，保證了數據的正常觸發(fā)并不丟失。研究雷達方式通信鏈路的調制解調方法，并考慮空中運動平臺所造成的多普勒頻移，采用二階差分編碼結合正交頻分復用調制解調技術來抵抗多普勒頻移，通過仿真分析證明了此方法是很好的抗多普勒頻移手段。研究開源軟件無線電技術和通用軟件無線電外設的架構及原理，詳細論述如何利用GNU Radio結合USRP硬件實現以雷達方式的通信，包括脈沖觸發(fā)信源的設計，抗多普勒頻移的通信鏈路設計等。 最終的綜合測試結果表明，設計的系統(tǒng)具有以脈沖多普勒雷達工作方式的通信能力，在人為加入載波頻偏后，依然能夠接收數據，證明系統(tǒng)具有抗多普勒頻移的性能，但二階差分的引入提高了系統(tǒng)對信噪比的需求。
[Abstract]:In recent decades, with the rapid development of electronic technology and information processing technology, the research on radar and communication technology has made great progress, and has been widely used in national defense and civil fields. In the modern electronic anti-Japanese war, the battle platform has put forward the requirement of multi-function and high stability to the electronic equipment constantly. The traditional single-function electronic equipment is facing the arduous combat task and the complex electromagnetic environment, and has already been unable to meet the wartime demand. Simply by increasing the variety and quantity of electronic equipment, it not only brings huge cost loss of space and energy, but also exacerbates the complexity of electromagnetic environment. Therefore, the research on the integrated integration of many electronic devices on combat platforms emerges as the times require. And become one of the hotspots of modern information technology research. This paper explores how to integrate the electronic equipment with different functions in the combat platform and realize various functional requirements with a single electronic platform. This not only improves the flexibility and versatility of the equipment, but also saves the space requirements. For the air combat platform, It is even more significant. Focusing on the background of the air combat platform, the communication function is embedded in the radar system. According to the working characteristics of airborne pulse Doppler radar, the software radio technology is used to realize the communication in the working mode of the radar system. It is implemented on the hardware of USRP (Universal Software Radio Peripheral, USRP) software radio. In addition, due to the high speed movement of fighter platform, the influence of fast time-varying Doppler frequency shift should be solved. In the design of radar communication, the research experience and present situation at home and abroad are explained at first, and the feasibility of using pulse Doppler radar to transmit data is explained according to the structural characteristics of radar and communication system. Secondly, the working mode of pulse Doppler radar is analyzed, and a suitable integrated signal source is designed. The data output is triggered by loading trigger pulse during the period of high level of radar pulse, which ensures that the normal trigger of data is not lost. The modulation and demodulation method of radar mode communication link is studied. Considering the Doppler frequency shift caused by the aerial motion platform, the second order differential coding combined with orthogonal frequency division multiplexing modulation and demodulation technique is adopted to resist the Doppler shift. The simulation results show that this method is a good anti-Doppler frequency shift method. This paper studies the architecture and principle of open source software radio technology and general software radio peripherals, and discusses in detail how to use GNU Radio and USRP hardware to realize radar communication, including the design of pulse trigger source. Design of communication link against Doppler shift, etc. The final comprehensive test results show that the designed system has the ability to work in the mode of pulse Doppler radar, and it can receive the data after adding carrier frequency offset artificially, which proves that the system has the capability of resisting Doppler shift. However, the introduction of second-order difference increases the demand for signal-to-noise ratio (SNR) of the system.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN958.95

【參考文獻】

相關期刊論文 前8條

1 ;交通資訊[J];城市交通;2009年01期

2 李朝偉;周希元;劉福來;;雷達/通信信號偵察一體化技術[J];艦船電子對抗;2008年02期

3 袁興生;段紅;姚新宇;馮曉梅;;脈沖多普勒雷達信號處理仿真系統(tǒng)研究[J];計算機應用;2009年S2期

4 楊小牛;;從軟件無線電到認知無線電,走向終極無線電——無線通信發(fā)展展望[J];中國電子科學研究院學報;2008年01期

5 李璐;李廣軍;李超強;;基于有源相控陣雷達的通信系統(tǒng)[J];中國電子科學研究院學報;2008年02期

6 陶玉柱;胡建旺;崔佩璋;;軟件無線電技術綜述[J];通信技術;2011年01期

7 李廷軍,任建存,趙元立,張金華;雷達—通信一體化研究[J];現代雷達;2001年02期

8 呂建民;;F-22戰(zhàn)斗機數據鏈現狀及發(fā)展[J];指揮信息系統(tǒng)與技術;2010年03期

本文編號：2187605