【摘要】：近幾十年來，隨著電子技術(shù)、信息處理技術(shù)的迅速發(fā)展，有關(guān)雷達(dá)和通信技術(shù)的研究也取得了巨大的進(jìn)步，并廣泛應(yīng)用于國防和民用領(lǐng)域。在現(xiàn)代電子對(duì)抗戰(zhàn)中，作戰(zhàn)平臺(tái)對(duì)電子設(shè)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(shè)備面對(duì)艱巨的作戰(zhàn)任務(wù)和復(fù)雜的電磁環(huán)境，已經(jīng)難以勝任戰(zhàn)時(shí)的需求。單靠增加電子設(shè)備的種類和數(shù)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(fù)雜，因此，對(duì)于作戰(zhàn)平臺(tái)上眾多電子設(shè)備綜合一體化的研究應(yīng)運(yùn)而生，并成為現(xiàn)代信息技術(shù)研究的熱點(diǎn)之一。探索如何在作戰(zhàn)平臺(tái)中把功能殊途的電子設(shè)備進(jìn)行整合，以單一電子平臺(tái)實(shí)現(xiàn)多種功能需求，這不僅提高了設(shè)備的靈活性和通用性，而且節(jié)省了空間需求，對(duì)于空中作戰(zhàn)平臺(tái)，其意義更為重大。 著眼于研究空中作戰(zhàn)平臺(tái)背景，在雷達(dá)系統(tǒng)中植入通信功能，針對(duì)機(jī)載脈沖多普勒雷達(dá)的工作特點(diǎn)，利用軟件無線電技術(shù)實(shí)現(xiàn)以雷達(dá)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(shè)備上進(jìn)行實(shí)現(xiàn)。此外，由于戰(zhàn)機(jī)平臺(tái)高速移動(dòng)的特性，應(yīng)解決好快速時(shí)變的多普勒頻移帶來的影響。 在以雷達(dá)方式通信的設(shè)計(jì)中，首先闡釋國內(nèi)外在此方面的研究經(jīng)驗(yàn)和現(xiàn)狀，結(jié)合雷達(dá)和通信系統(tǒng)各自結(jié)構(gòu)特點(diǎn)，闡釋利用脈沖多普勒雷達(dá)進(jìn)行數(shù)據(jù)傳輸?shù)目尚行浴Ｆ浯�，分析了脈沖多普勒雷達(dá)工作方式，設(shè)計(jì)出適合的一體化信號(hào)源，利用雷達(dá)脈沖高電平期間加載觸發(fā)脈沖的形式觸發(fā)數(shù)據(jù)輸出，，保證了數(shù)據(jù)的正常觸發(fā)并不丟失。研究雷達(dá)方式通信鏈路的調(diào)制解調(diào)方法，并考慮空中運(yùn)動(dòng)平臺(tái)所造成的多普勒頻移，采用二階差分編碼結(jié)合正交頻分復(fù)用調(diào)制解調(diào)技術(shù)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(shù)和通用軟件無線電外設(shè)的架構(gòu)及原理，詳細(xì)論述如何利用GNU Radio結(jié)合USRP硬件實(shí)現(xiàn)以雷達(dá)方式的通信，包括脈沖觸發(fā)信源的設(shè)計(jì)，抗多普勒頻移的通信鏈路設(shè)計(jì)等。 最終的綜合測(cè)試結(jié)果表明，設(shè)計(jì)的系統(tǒng)具有以脈沖多普勒雷達(dá)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(shù)據(jù)，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(duì)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(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)】：TN958.95

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