本文選題：多普勒測速雷達　切入點：FPGA　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：新一代外貿(mào)155多普勒測速雷達是測量155mm自行火炮彈丸初速的重要儀器,數(shù)字信號處理系統(tǒng)是其重要組成部分。隨著對雷達測速精度要求的不斷提高,研發(fā)實時、高效、精度高的測速雷達數(shù)字信號處理系統(tǒng)具有十分重要的意義。本文就是研究并實現(xiàn)了基于FPGA的新一代外貿(mào)155多普勒測速雷達實時信號處理系統(tǒng)。本文依據(jù)新一代外貿(mào)155多普勒測速雷達的應(yīng)用場景,在分析其工作原理的基礎(chǔ)上,探討了傳統(tǒng)頻譜分析方法對測速精度的影響,通過分析比較Zoom-FFT、Rife和CZT三種高精度測頻算法,提出了一種基于FFT-CZT聯(lián)合算法的頻率估計方案。經(jīng)過對FFT-CZT聯(lián)合算法和傳統(tǒng)譜分析法的仿真比較,驗證了所提出方案可以有效地提高系統(tǒng)的頻率估計精度。在硬件實現(xiàn)上,根據(jù)新一代外貿(mào)155多普勒測速雷達系統(tǒng)的要求,本文提出一種基于FPGA的多普勒測速雷達實時信號處理系統(tǒng)的實現(xiàn)方案。采用Altera公司的Cyclone Ⅲ系列中的EP3C25F256I7芯片,完成系統(tǒng)中數(shù)據(jù)的高速緩存、FFT-CZT聯(lián)合算法的硬件實現(xiàn)以及FPGA與ARM處理器的數(shù)據(jù)接口設(shè)計。并對其系統(tǒng)性能進行測試和誤差分析,測試結(jié)果表明本系統(tǒng)可以實現(xiàn)測速雷達多普勒信號的實時、高速、高精度的處理。
[Abstract]:A new generation of foreign trade 155 Doppler velocimetry radar is an important instrument for measuring the initial velocity of 155mm self-propelled artillery projectile, and the digital signal processing system is an important part of it. The high precision digital signal processing system of speed measuring radar is very important. This paper studies and implements a new generation of foreign trade 155 Doppler velocity radar real time signal processing system based on FPGA. The application scene of ma-155 Doppler velocimetry radar, Based on the analysis of its working principle, the influence of the traditional spectrum analysis method on the accuracy of velocity measurement is discussed, and three kinds of high precision frequency measurement algorithms, Zoom-FFT FT-Rife and CZT, are analyzed and compared. A frequency estimation scheme based on FFT-CZT joint algorithm is proposed. The simulation results of FFT-CZT joint algorithm and traditional spectral analysis show that the proposed scheme can effectively improve the accuracy of frequency estimation of the system. According to the requirements of the new generation of foreign trade 155 Doppler velocimetry radar system, this paper presents a scheme of real-time signal processing system of Doppler velocimetry radar based on FPGA. The EP3C25F256I7 chip of Cyclone 鈪，

本文編號：1632906