基于DSP的电子侦察信号处理技术研究

发布时间：2018-02-27 09:23

本文关键词： 电子侦察信号处理信号分选脉冲描述字 DSP 小波变换脉内调制特征分析　出处：《西安电子科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：电子侦察信号处理技术在现代电子战系统中的地位显得日益重要，包括信号参数的估计、信号调制样式的确定、辐射源识别等信号处理技术。本文主要研究了基于ADSP-TS101S的电子侦察信号处理技术。首先介绍了论文研究的背景以及数字信号处理芯片的发展动态，接着讨论了对雷达信号基本参数的处理技术，包括脉冲到达时间、脉冲宽度、载波频率、脉冲到达方向、脉冲幅度以及脉内调制特征参数；然后对单个辐射源和多个辐射源情形下脉冲描述字流的形成算法进行了研究。接下来重点分析了电子侦察脉冲信号分选中常用的三种算法：累计差值直方图(CDIF)算法、序列差值直方图(SDIF)算法和PRI变换法，通过仿真分析了三种算法的原理及其运算量，选择序列差值直方图(SDIF)算法作为电子侦察脉冲信号的分选算法；然后建立了单载频信号、线性调频信号和二相编码信号的数学模型，研究了三种信号的时域和频域特征，通过仿真讨论了常用脉内调制分析算法的原理和性能，，根据讨论的结果，采用小波变换法实现脉内调制特征参数的提取。最后，以ADSP-TS101S为核心设计了电子侦察信号处理模块，给出了系统的硬件设计方案，详细分析了基于ADSP-TS101S的硬件电路设计和信号处理板的数据传输流程。
[Abstract]:Electronic reconnaissance signal processing technology has become increasingly important in modern electronic warfare systems, including signal parameter estimation, signal modulation pattern determination, emitter identification and other signal processing techniques. This paper mainly studies the technology of electronic reconnaissance signal processing based on ADSP-TS101S. Firstly, the background of this paper and the development trend of digital signal processing chip are introduced, and then the processing technology of the basic parameters of radar signal is discussed. It includes pulse arrival time, pulse width, carrier frequency, pulse arrival direction, pulse amplitude and characteristic parameters of pulse modulation. Then, the algorithm of pulse description word flow is studied in the case of single emitter and multiple emitter sources. Then, three common algorithms in pulse signal sorting for electronic reconnaissance are analyzed: cumulative difference histogram (CIF) algorithm, sequence difference histogram (SDIFF) algorithm and PRI transform method. The principle of the three algorithms and their operation amount are analyzed by simulation. The sequence difference histogram (SDIF) algorithm is selected as the sorting algorithm for the electronic reconnaissance pulse signal, and the mathematical models of single carrier frequency signal, linear frequency modulation signal and two phase coded signal are established, and the time domain and frequency domain characteristics of the three signals are studied. The principle and performance of the common intrapulse modulation analysis algorithms are discussed by simulation. According to the results, wavelet transform is used to extract the characteristic parameters of intra-pulse modulation. Finally, the electronic reconnaissance signal processing module is designed with ADSP-TS101S as the core, and the hardware design scheme of the system is given. The hardware circuit design based on ADSP-TS101S and the data transmission flow of the signal processing board are analyzed in detail.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN971.1

【参考文献】