Link16数据链信号的识别算法研究

发布时间：2018-07-11 13:13

本文选题：数据链 + Link16　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：数据链是信息战的重要部分,而Link16数据链已经成为各国研究的热点,并且得到了广泛的应用。目前,信号的截获技术已经比较成熟,但问题在于如何识别已截获信号的类型,然后有针对性的做出干扰等对抗措施。基于此,本文对Link16数据链信号的识别算法进行了研究。本文首先分析研究了Link16数据链信号的通信协议和信号特征,在此基础上提取出可以用于识别Link16数据链信号的三个特征,其分别是:脉冲调制特征、MSK调制特征和跳频调制特征,并针对这三个特征进行了识别算法的研究和相应的参数估计。1、对脉冲调制特征进行识别算法研究。本文改进了基于四阶循环累积量进行脉冲调制检测的方法,并对Link16数据链信号的脉冲周期和占空比进行了精确的估计。2、对MSK调制特征进行识别算法研究。Link16数据链信号的特点是在MSK调制的基础上进行跳频调制。本文通过分析研究Link16数据链信号跳频MSK调制的特点,提出了一种跳频MSK调制信号的识别算法,并对Link16数据链信号的MSK调制特征进行了参数估计。3、对跳频调制特征进行识别算法研究。本文提出了针对于Link16数据链信号跳频特性的预处理算法和分段识别算法,并在此基础上进行了跳频参数估计。其中基于Link16数据链信号的预处理算法降低了时频分析算法分析Link16信号跳频特性的复杂度,并且提高了跳频参数估计的精度。
[Abstract]:Data link is an important part of information warfare, and Link16 data link has become a hot spot in many countries and has been widely used. At present, the technology of signal interception is mature, but the problem is how to identify the type of the intercepted signal, and then make countermeasures such as jamming. Based on this, the recognition algorithm of Link16 data link signal is studied in this paper. Firstly, the communication protocol and signal characteristics of Link16 data link signal are analyzed and studied in this paper. On this basis, three features that can be used to identify Link16 data link signal are extracted, which are: pulse modulation feature, MSK modulation feature and frequency hopping modulation feature. The recognition algorithm of the three features and the corresponding parameter estimation. 1. The recognition algorithm of the pulse modulation feature is studied. In this paper, the method of pulse modulation detection based on fourth-order cyclic cumulants is improved. The pulse period and duty cycle of Link16 data link signal are estimated exactly. 2. The recognition algorithm of MSK modulation feature is studied. The characteristic of. Link16 data link signal is frequency hopping modulation based on MSK modulation. By analyzing the characteristics of frequency hopping MSK modulation of Link16 data link signal, a recognition algorithm of frequency hopping MSK modulation signal is proposed in this paper. The MSK modulation feature of Link16 data link signal is estimated by parameter estimation. 3, and the algorithm of frequency hopping modulation feature recognition is studied. In this paper, a preprocessing algorithm and a piecewise recognition algorithm for the frequency hopping characteristics of Link16 data link signal are proposed, and the frequency hopping parameters are estimated on the basis of this algorithm. The preprocessing algorithm based on Link16 data link signal reduces the complexity of time-frequency analysis algorithm to analyze the frequency hopping characteristic of Link16 signal and improves the precision of frequency hopping parameter estimation.
【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】：2014
【分类号】：TN919.2

【参考文献】