本文選題：FPGA + 同步測頻法　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：近幾年來,電子技術(shù)發(fā)展十分迅速,尤其是在通信和航空領(lǐng)域。在這兩個(gè)領(lǐng)域中,頻率測量的精度直接保證了通信的可靠性,因此,對頻率測量技術(shù)的要求越來越高,如何快速、高精度的測量脈內(nèi)信號的頻率一直是研究人員關(guān)注的研究重點(diǎn)。本文首先介紹了幾種常用的測頻方法,包括直接計(jì)數(shù)法、模擬內(nèi)插法以及同步測頻法,研究分析這幾種方法的工作原理及誤差來源,在此基礎(chǔ)上,提出了基于回歸分析的測頻方法,接下來,較為詳細(xì)地闡述了該方法的具體工作原理,并根據(jù)原理提出了課題的設(shè)計(jì)方案。在文章中,詳細(xì)介紹了基于回歸分析的測頻方法的設(shè)計(jì)總體方案,包括硬件電路的設(shè)計(jì)以及邏輯功能的實(shí)現(xiàn)。測頻電路是以FPGA為基礎(chǔ),還包括一些相應(yīng)的外圍電路。邏輯設(shè)計(jì)是整個(gè)方案中的核心,它主要包括計(jì)數(shù)閘門的產(chǎn)生、時(shí)間點(diǎn)采樣、數(shù)據(jù)處理以及和上位機(jī)之間的通信。當(dāng)保證硬件設(shè)計(jì)無誤后,搭建測試平臺(tái),結(jié)合上位機(jī)測試軟件對本測頻方案進(jìn)行驗(yàn)證,最終根據(jù)得到的結(jié)果驗(yàn)證本方案的可行性,同時(shí)達(dá)到了設(shè)計(jì)的指標(biāo)要求。本方案的硬件電路結(jié)構(gòu)簡單、易實(shí)現(xiàn)、成本低廉、測頻精度高,在500 ns的測頻時(shí)間內(nèi),測頻誤差在200 kHz以內(nèi)。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM935.1

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬紅星;;雷達(dá)個(gè)體識別系統(tǒng)設(shè)計(jì)[J];兵工自動(dòng)化;2007年01期

2 胡翔;王t，

本文編號：1791500