基于软件无线电的数据链信号检测技术研究

发布时间：2018-03-14 11:35

本文选题：数据链　切入点：软件无线电　出处：《沈阳理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：数据链作为“现代信息化作战的神经网络”,通过在多种平台间构建“交叉”式传输网络,使诸兵种间可在第一时间共享各种战术信息,实现信息实时性传输,是实施快速打击和取得战场主动权的有力保障。在无线通信过程中,如何在外界干扰及内部噪声环境下检测出有用信号,尤其对数据链信号的有效检测,不但可以为后期数据分析提供参数,还可为设计具有保密和抗截获特性的数据链信号提供指导。将数据链信号检测方法进行工程实现,可采用软件无线电技术,以硬件平台为依托,采用模块化、结构化的设计方法,具有很高的灵活性和可重构性。为此,本文开展基于软件无线电的数据链信号检测技术研究,并基于FPGA+Power PC软件无线电平台进行检测单元设计和关键模块实现,为关键算法的实际应用提供基础,具有重要的实际意义。本文在对软件无线电基本理论研究基础上,对信号采样理论和多率信号处理技术进行了深入分析,研究了基于FPGA+Power PC架构的软件无线电平台。进一步通过对直扩数据链信号产生机理及信号特性的深入分析,对直扩数据链信号检测技术进行深入研究,重点对直扩数据链信号的STFT法、正交分路检测法进行研究,并对传统延时相乘法和平方倍频法加以改进,提出基于延时相乘自相关的伪码速率估计方法和基于集平均-平方倍频法的载波频率估计方法,有效地降低了信号中噪声成分影响,实现了低信噪比下信号参数的有效估计。同时在分析跳频数据链信号关键技术基础上,对多跳自相关检测方法进行深入研究,基于集平均-平方倍频法和SPWVD法实现跳频数据链信号载波频率、跳速及跳驻留时间的有效估计。进一步,基于FPGA+Power PC架构的软件无线电平台,利用ISE 13.2和Work Bench 3.1开发环境,对直扩/跳频数据链信号检测单元进行设计与实现,利用ModelsimSE 6.5b、Matlab7.1和Secure CRT仿真工具,对设计的关键单元进行了仿真验证与结果分析,验证了直扩/跳频数据链信号检测单元的正确性和有效性。
[Abstract]:The data link as "neural network" of modern information war, through the construction of "cross" type transmission network in a variety of platforms, which can be shared between the various arms of various tactical information in the first time, realize the real-time transmission of information, is a powerful guarantee for the rapid implementation of combat and get the initiative on the battlefield. During the course of wireless communication, how to to detect the useful signal in the external interference and internal noise environment, especially the effective detection of the signal, not only can provide parameters for later data analysis, but also for the design of a secure and anti interception characteristics according to the number of signal chain to provide guidance. The detection method of signal for the realization of the project, using software radio technology in hardware, platform, modular, structured design method, has high flexibility and reconfigurability. Therefore, this paper carried out based on the software radio number According to the detection signal and the FPGA+Power chain, PC software radio platform based on detection unit design and Realization of key modules, provides the foundation for the practical application of the key algorithm, has important practical significance. Based on the basic theory of software radio based on the signal sampling theory and multi rate signal processing technology in-depth study. Study on the FPGA+Power software radio platform based on PC architecture. Through further analyzing the generation mechanism and signal characteristics of DSSS signal data link, data link for the DS signal detection technology are studied in this paper, the key method of STFT DS data link signal, of orthogonal shunt detection method, and the traditional phase delay multiplication and square frequency modified method is proposed based on delay multiplication autocorrelation of PN code rate estimation method based on carrier and set - average square frequency method The frequency estimation method can effectively reduce the influence of noise components in the signal, realizes the effective estimation of signal parameters than under low SNR. At the same time in the analysis of frequency hopping data link signal key technology on the basis of in-depth study on the autocorrelation detection method in multi hop, mean square frequency method and SPWVD method to realize frequency hopping signal based on the estimation of carrier frequency, jump jump speed and dwell time. Further, FPGA+Power software radio platform based on PC architecture, using ISE 13.2 and Work Bench 3.1 development environment, the DS / FH data link signal detection unit is designed and implemented using ModelsimSE, 6.5B, Matlab7.1 and Secure CRT simulation tool, the key element of the design is verified by simulation and analysis, verify the correctness and validity of DS / FH data link signal detection unit.

【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN911.23;TN92

【相似文献】