基于软件无线电平台雷达方式通信研究与实现
发布时间：2018-08-17 12:17
【摘要】：近几十年来，随着电子技术、信息处理技术的迅速发展，有关雷达和通信技术的研究也取得了巨大的进步，并广泛应用于国防和民用领域。在现代电子对抗战中，作战平台对电子设备不断提出多功能、高稳定性要求，传统单一功能的电子设备面对艰巨的作战任务和复杂的电磁环境，已经难以胜任战时的需求。单靠增加电子设备的种类和数量，不仅带来巨大的空间和能源的成本损耗，而且加剧电磁环境的复杂，因此，对于作战平台上众多电子设备综合一体化的研究应运而生，并成为现代信息技术研究的热点之一。探索如何在作战平台中把功能殊途的电子设备进行整合，以单一电子平台实现多种功能需求，这不仅提高了设备的灵活性和通用性，而且节省了空间需求，对于空中作战平台，其意义更为重大。 着眼于研究空中作战平台背景，在雷达系统中植入通信功能，针对机载脉冲多普勒雷达的工作特点，利用软件无线电技术实现以雷达系统工作方式的通信，并在USRP(Universal Software Radio Peripheral, USRP)通用的软件无线电硬件设备上进行实现。此外，由于战机平台高速移动的特性，应解决好快速时变的多普勒频移带来的影响。 在以雷达方式通信的设计中，首先阐释国内外在此方面的研究经验和现状，结合雷达和通信系统各自结构特点，阐释利用脉冲多普勒雷达进行数据传输的可行性。其次，分析了脉冲多普勒雷达工作方式，设计出适合的一体化信号源，利用雷达脉冲高电平期间加载触发脉冲的形式触发数据输出，，保证了数据的正常触发并不丢失。研究雷达方式通信链路的调制解调方法，并考虑空中运动平台所造成的多普勒频移，采用二阶差分编码结合正交频分复用调制解调技术来抵抗多普勒频移，通过仿真分析证明了此方法是很好的抗多普勒频移手段。研究开源软件无线电技术和通用软件无线电外设的架构及原理，详细论述如何利用GNU Radio结合USRP硬件实现以雷达方式的通信，包括脉冲触发信源的设计，抗多普勒频移的通信链路设计等。 最终的综合测试结果表明，设计的系统具有以脉冲多普勒雷达工作方式的通信能力，在人为加入载波频偏后，依然能够接收数据，证明系统具有抗多普勒频移的性能，但二阶差分的引入提高了系统对信噪比的需求。
[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.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN958.95
本文编号：2187605
[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.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN958.95
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