基于回归分析的测频方法研究与实现

发布时间：2018-04-23 10:07

本文选题：FPGA + 同步测频法　；参考：《电子科技大学》2014年硕士论文

【摘要】：近几年来,电子技术发展十分迅速,尤其是在通信和航空领域。在这两个领域中,频率测量的精度直接保证了通信的可靠性,因此,对频率测量技术的要求越来越高,如何快速、高精度的测量脉内信号的频率一直是研究人员关注的研究重点。本文首先介绍了几种常用的测频方法,包括直接计数法、模拟内插法以及同步测频法,研究分析这几种方法的工作原理及误差来源,在此基础上,提出了基于回归分析的测频方法,接下来,较为详细地阐述了该方法的具体工作原理,并根据原理提出了课题的设计方案。在文章中,详细介绍了基于回归分析的测频方法的设计总体方案,包括硬件电路的设计以及逻辑功能的实现。测频电路是以FPGA为基础,还包括一些相应的外围电路。逻辑设计是整个方案中的核心,它主要包括计数闸门的产生、时间点采样、数据处理以及和上位机之间的通信。当保证硬件设计无误后,搭建测试平台,结合上位机测试软件对本测频方案进行验证,最终根据得到的结果验证本方案的可行性,同时达到了设计的指标要求。本方案的硬件电路结构简单、易实现、成本低廉、测频精度高,在500 ns的测频时间内,测频误差在200 kHz以内。
[Abstract]:In recent years, electronic technology has developed very rapidly, especially in the field of communication and aviation. In these two fields, the accuracy of frequency measurement directly guarantees the reliability of communication. High-precision measurement of the frequency of intra-pulse signals has been the focus of researchers. This paper first introduces several common frequency measurement methods, including direct counting method, analog interpolation method and synchronous frequency measurement method, and analyzes the working principle and error source of these methods. A frequency measurement method based on regression analysis is proposed. Then, the working principle of the method is described in detail, and the design scheme of the subject is put forward according to the principle. In this paper, the overall scheme of frequency measurement based on regression analysis is introduced in detail, including the design of hardware circuit and the realization of logic function. The frequency measurement circuit is based on FPGA and includes some peripheral circuits. Logic design is the core of the whole scheme. It mainly includes the generation of counting gate, time sampling, data processing and communication with host computer. When the hardware design is guaranteed, the test platform is built, and the frequency measurement scheme is verified by the host computer test software. Finally, the feasibility of the scheme is verified according to the obtained results, and the design requirements are met. The hardware circuit of this scheme is simple, easy to realize, low cost and high precision of frequency measurement. The error of frequency measurement is less than 200 kHz in the time of 500ns.
【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】：TM935.1

【共引文献】