基于OFDM的通信与雷达共享信号设计

发布时间：2018-05-08 11:44

本文选题：多载波 + 正交频分复用信号　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：随着信息技术的飞速发展,信息传输速率的提升使得通信信号的带宽不断拓宽数字化程度逐渐提升,系统功能大幅度扩展,利用在通信系统的密集布站实现对通信基站覆盖范围内目标探测的需求应运而生,通信雷达一体化成为信息领域新的研究热点,而通信雷达共享信号设计是其关键技术之一。基于此,本课题主要基于通信系统中常用的OFDM形式研究适用于通信雷达一体化的信号,并研究从多载波信号中估计目标参数的问题。本文具体的研究工作如下:首先,研究OFDM信号的基本理论。主要是针对移动通信系统,分析OFDM信号产生方法以及信号形式,然后分析OFDM信号数据帧的结构特点,并指出对动目标探测可能会带来的影响,并给出相应解决方法。其次,基于OFDM的信号分析。主要分析发射OFDM信号的探测范围,通过计算确定探测范围满足研究的问题背景;然后进一步分析各种编码调制的OFDM信号的目标探测性能和通信性能。最后,研究了基于OFDM信号探测动目标的算法。基于OFDM信号的动目标回波模型,从理论上推导出要进行参数估计函数形式,给出参数估计的算法,然后通过仿真验证算法的可行性,指出算法的优势和局限,尝试通过常见的方法改进算法的局限,用各编码调制的OFDM信号分析信号和算法的综合探测性能,并给出用实测数据处理的得到的结果,进一步证实算法的有效性。
[Abstract]:With the rapid development of information technology and the improvement of information transmission rate, the bandwidth of communication signal has been widened and digitized, and the system function has been greatly expanded. The requirement of target detection within the coverage of communication base station is realized by means of dense distribution station of communication system. The integration of communication radar has become a new research hotspot in the field of information, and the design of shared signal of communication radar is one of its key technologies. Based on this, this paper mainly studies the signal which is suitable for the communication radar integration based on the commonly used OFDM form in the communication system, and studies the problem of estimating the target parameters from the multi-carrier signal. The research work of this paper is as follows: firstly, the basic theory of OFDM signal is studied. Aiming at mobile communication system, this paper analyzes the OFDM signal generation method and signal form, then analyzes the structural characteristics of OFDM signal data frame, points out the possible influence on moving target detection, and gives the corresponding solution. Secondly, the signal analysis based on OFDM. This paper mainly analyzes the detection range of transmitted OFDM signal, determines the detection range to meet the background of the research by calculation, and further analyzes the target detection performance and communication performance of various coded and modulated OFDM signals. Finally, the algorithm of detecting moving target based on OFDM signal is studied. Based on the moving target echo model of OFDM signal, the function form of parameter estimation is derived theoretically, and the algorithm of parameter estimation is given. Then, the feasibility of the algorithm is verified by simulation, and the advantages and limitations of the algorithm are pointed out. This paper attempts to improve the limitation of the algorithm by using common methods to analyze the comprehensive detection performance of the signal and the algorithm by using the coded modulated OFDM signals. The results obtained from the processing of the measured data are given to further verify the effectiveness of the algorithm.
【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】：2017
【分类号】：TN929.53;TN957.51

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