基于MIMO的雷达通信一体化技术研究

发布时间：2018-05-07 01:28

本文选题：MIMO + 雷达通信一体化　；参考：《电子科技大学》2014年硕士论文

【摘要】：将雷达、通信设备有机地结合起来,构成综合性雷达通信一体化体系是现代技术发展的必然趋势,它能够解决作战平台实时协调工作与系统资源合理分配的问题,从而实现装备的小型化、通用化和多功能化。信号共享是更高程度地实现多功能综合射频一体化的有效途径,其研究重点在于一体化共享信号的设计方法,以及信号的调制解调技术。MIMO(多输入多输出)通信能够在不改变带宽的情况下成倍提高系统的信息容量,而MIMO雷达采用宽波束发射宽波束接收的工作模式,其低增益的宽波束能够覆盖很大的空域范围,并且具有很好的抗截获性能,以及很好的速度分辨力。MIMO通信和MIMO雷达的很多关键性系统参数非常相似,在MIMO背景下实现基于信号共享的雷达通信一体化,能够很好的将二者优点结合在一起,提高系统资源的使用效率。本文在MIMO背景下开展雷达通信一体化技术的研究,具体工作内容如下:(1)分析了雷达通信一体化的工作模式,以及MIMO背景下实现雷达通信一体化的可行性,给出了MIMO背景下基于信号共享的雷达通信一体化系统方案。(2)结合信息量、同步和解码的需求将软扩频双正交的编码思想运用到雷达通信一体化信号设计中,提出了两种可行的信号设计思路,并利用遗传算法加Walsh函数的方法来生成一体化编码时需要的扩频码;针对两种不同的设计思路,分别给出了相应的编码方法。(3)针对本文提出的一体化共享信号设计方法,利用非相干解调方法解决了一体化信号时间同步、相偏提取和通信解码的问题,并运用MIMO雷达提取多普勒频率的方法实现了一体化信号载波频偏的提取。(4)利用一套双基MIMO雷达硬件实验系统,开展了雷达通信一体化实验。根据实验需求,完成了上位机操作界面的设计;通过实验,验证了本文一体化信号设计及处理方法的有效性;同时,提出了利用一体化共享信号来实现双基MIMO雷达主、副站之间协调工作的新思路。
[Abstract]:It is an inevitable trend of modern technology to combine radar and communication equipment organically to form an integrated radar communication system, which can solve the problem of real-time coordination of combat platform and rational allocation of system resources. Thus, the miniaturization, generalization and multifunction of the equipment are realized. Signal sharing is an effective way to realize the integration of multi-function integrated radio frequency to a higher degree. The emphasis of its research is the design method of integrated shared signal. The signal modulation and demodulation technology .MIMO.MIMO. can multiply the information capacity of the system without changing the bandwidth, while the MIMO radar adopts the operation mode of wide-beam transmitting wide-beam reception. Its wide beam with low gain can cover a wide range of airspace, and it has good anti-interception performance, and good velocity resolution. MIMO communication and many key system parameters of MIMO radar are very similar. To realize the integration of radar communication based on signal sharing under the background of MIMO can combine the advantages of the two well and improve the efficiency of using system resources. In this paper, the research of radar communication integration technology is carried out under the background of MIMO. The specific work contents are as follows: 1) the working mode of radar communication integration is analyzed, and the feasibility of realizing radar communication integration under the background of MIMO is analyzed. In this paper, the scheme of radar communication integration system based on signal sharing in MIMO is presented. Combining with the requirement of information quantity, synchronization and decoding, the idea of soft spread spectrum biorthogonal coding is applied to the design of radar communication integrated signal. In this paper, two feasible signal design ideas are put forward, and genetic algorithm and Walsh function are used to generate the spread spectrum code needed in the integrated coding. According to the design method of integrated shared signal proposed in this paper, the incoherent demodulation method is used to solve the problems of time synchronization, phase offset extraction and communication decoding of integrated signal. Using the method of MIMO radar to extract Doppler frequency, the integrated signal carrier frequency offset is extracted. 4) A set of hardware experiment system of bistatic MIMO radar is used to carry out the integrated radar communication experiment. According to the requirements of the experiment, the design of the upper computer operation interface is completed, and the effectiveness of the integrated signal design and processing method is verified through the experiment. At the same time, the realization of the bistatic MIMO radar master by using the integrated shared signal is put forward. A new idea of coordinating work between secondary stations.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN958

【共引文献】