fft algorithm 中文意思是什麼
-
The key to the fft algorithm is the design of butterfly computation and that of the address logic. the whole schema is designed in the top - down design flow and described in the vhsic hardware description language ( vhdl ), basing on these, we do our research on reconfigurable technology. the result indicates that the data processing ability of reconfigurable system improved greatly
結果表明，可重構系統在數據處理能力方面比以往的系統有了很大的提高，本設計實現的fft重構處理器可工作於60mhz下，完成一個16點fft需要132個主時鐘周期，完成32點fft需要324個主時鐘周期，而且具有一定可重構性，可以方便地將其運算點數進行擴展，或將其他的圖像處理演算法在實時處理系統中實現。 -
It is discussed that the present harmonic analyzers do n ' t satisfy the requirements of china standard for harmonic measure of quick disturbance harmonic load. the measurement error brought about by the harmonic analyzers adopting ft or fft algorithm is analyzed. a cycle discrete fourier algorithm that should n ' t be effected by aperiodic component is presented, and the results of simulation show that it has higher accureacy
本文對電力系統諧波的測量方法，數據處理及電力牽引負荷對電力系統的影響進行了研究，論述了目前國內外生產的諧波分析儀用於快速波動諧波負荷的測量不滿足國標的要求，分析了諧波分析儀普遍採用的ft或fft演算法所產生的測量誤差，提出了一種不受非周期分量影響的全周波離散傅里葉演算法，模擬結果表明精度好。 -
In chapter 4 we discuss the design of the high speed and high performance vlsi and its imp1ementation, firstly we ana1yze and compare the features and ru1es of al1 kinds of fft algorithm, adopt complex radix 4 butterfly calcu1ation as basic alu, then discuss all kinds of process architectures, the design thoughts, rule, method, technique way, the characteristics of the design are r4 dit algorithm, pingpong ram design method and pipeline structure between stages. we also analyze the limited word length effect and the method to avoid overflow of the fixed points fft process, bring out the expandable platform mode
第四章主要討論了高速高性能的快速傅立葉變換處理器的設計和實現，首先分析和比較了各種快速傅立葉變換演算法的特性和規律，提出基4蝶算的演算法具有最好的性價比，討論了順序、級聯、并行和陣列的處理結構，闡述了設計高速高性能快速傅立葉變換處理器時的設計原則、設計思路、所採用的技術路線，驗證並測試fft處理器，分析了定點fft處理過程由於有限字長效應所產生的量化誤差的范圍及防溢出控制辦法，提出了可擴展平臺模式。 -
In the third part, gives a new fft algorithm for realization ofdm modulation in fpga
第三部分為在的現場可編程邏輯門陣列（ fpga ）上實現ofdm調制模塊。 -
Among the different imaging algorithms, the range - doppler fft ( r - d fft ) algorithm, based on range - doppler theory, in which the fast fourier transform ( fft ) is employed to reduce compute burden, is widely used in various imaging radar because it can be easily realized in real - time application
陸基成像雷達（ gbr ）作為isar成像技術的重要應用，其觀測目標具有速度快，慣性大，運動相對平穩等特點，針對這些特點，本文對isar成像運動補償方面作了較為深入的研究。 -
The concept, advantages and history of bistatic isar are introduced first in this paper, then 2 - d turntable imaging of monostatic isar the special example of bistatic isar is studied. on the basis of monostatic isar four imaging algorithms are analyzed, including fft algorithm, filtered backprojection algorithm, spectrum extrapolation algorithm and esprit algorithm, and compared in the small and big angel of imaging. on the basis of monostatic imaging the 2 - d turntable imaging principle of bistatic isar is studied,
本文首先闡述了雙站逆合成孔徑雷達的概念、優點和發展歷程，然後研究了雙站逆合成孔徑雷達的特例? ?單站逆合成孔徑雷達對轉臺目標的二維成像演算法，並在此基礎上分析了四種主要的轉臺成像演算法， fft演算法、濾波逆投影演算法、譜外推演算法和esprit演算法，並對以上各種演算法分別在小角度和大角度下的成像性能進行了比較。 -
Furthermore, sampling and processing of ac, including some ac sampling algorithms, are reached. mainly, fft algorithm and full - wave fourier algorithm are discussed. calculation of active power and imaginary power is researched
同時對模擬量的採集與處理以及一些交流采樣的演算法進行了研究；主要就快速傅里葉變換演算法、全波傅氏演算法以及有功功率、無功功率的計算、濾波的參數選取、諧波的計算進行了討論。 -
Employing the dsp technology, we can carry out the real - time fft algorithm, which is the kernel in ofdm technology. with the developing of dsp and vlsi technology, ofdm develops rapidly and becomes a promising high - speed signal transmission technology in practical applications
隨著dsp和超大規模集成電路（ vlsi ）技術的發展， ofdm的應用有了長足的進步，成為極有發展前途和應用前景的高速數據傳輸技術。 -
It summarizes the basic conceptions of image compress processing, parallel processing technique and parallel algorithm briefly. then it emphasizes on the network parallel computing environment and logp model of parallel computation. this paper describes the methods of developing parallel algorithm and applications through the designing, analyzing, optimizing, and implementing of digital image processing parallel algorithm, include fft algorithm, wavelet transform, medium filtering, binary image algorithm etc
本文概述了并行處理技術和圖像壓縮技術;並詳細闡述了并行演算法及圖像處理演算法的基本概念和模型;詳細討論了網路并行logp模型及并行演算法的開發環境;並進行了fft并行編碼演算法、小波并行編碼演算法，中值濾波，圖像二值化等圖像處理的并行演算法的設計與分析。 -
In this paper, the design and implementation of real - time image capture board based on tms320c6205 dsp ( digital signal processor ) for plate recognition and fft algorithm is studied. also, the methodology for hand - coding algorithms and software pipelines for tms320c6205 vliw - type processors are proposed for improving the code efficiency. last, the optimized methods for realizing plate recognition system and fft are applied
本文用基於tms320c6205數字信號處理器的實時圖像處理板來實現牌照識別系統以及fft演算法，主要包括： 1 ）自行設計和製作了實時圖像處理板2 ）提出了針對tms320c6205vliw結構的手動編碼方法以及流水線實現方法，用以提高代碼的效率3 ）提出了針對牌照識別系統和fft演算法的優化方法。 -
The concepts of filtering and sampling power system voltage and current signals for harmonic analysis using the fast fourier transform ( fft ) algorithm by a digital signal processor are introduced
軟體演算法方面，系統採用傳統的快速付立葉變換（ fft ） ，對採集的電壓和電流信號進行頻譜分析。 -
Experiment result shows that the board has realtime performance for plate recognition and fft algorithm and is good for application
最後給出的實驗結果是滿意的，能夠達到實時的性能，顯示出其應用的價值。 -
Longing to solving some of those problems, we took some new ideas. we reduce the error of fft algorithm by using the proper floating format chip
論文圍繞如何提高fft運算的實時性和準確性兩大問題，探討了在測量硬體和軟體方面的改進方法。 -
After coming into 70 ' s, microcomputers have been used more and more popular, especially fft algorithm introduced, which made vibration testing and analysis technique enter a new stage
進入70年代以後，微型計算機的普遍推廣應用，特別是fft演算法的引入，使得振動測試分析技術進入了新時期。 -
Dft method can be fast implemented on dsp platform by the use of fft algorithm, while the method of cyclic correlation has better noise immunity performance and high estimation accuracy
離散傅立葉變換方法能夠在dsp平臺上通過fft快速實現，而循環相關方法則具有很高的頻率估計精度和很好的抗噪性能。 -
Scheme iii. a system combining fft algorithm with chirp - z transform to detect feedback rapidly and accurately. then, adopting a filter bank composed of 12 iir narrow - band notch filters to eliminate feedback
採用chirp - z變換（ czt ）演算法與fft演算法相結合對聲反饋進行檢測，使用由12個iir窄帶陷波器構成的濾波器組對聲反饋進行抑制。 -
Ar model algorithm and fft algorithm for resolving power spectrum is compared as well. it shows that ar model algorithm is better than fft method. analyzing 15 minute hrv ( sit ) of 23 healthy persons by using ar and fft method
對23例正常人（坐姿） 15分鐘hrv信號分別採用fft和現代譜估計得到的功率譜進行統計，發現兩種方法所得vlf 、 lf 、 hf基本吻合（相同性別相應年齡段） 。 -
After consulting many literature and papers, the system adopts fft algorithm to do harmonic analysis with the thought of vlsi design technique. besides, the module can communicate with dsp by two modes : parallel and serial
本設計方案中，對匯流條進行電能質量監測，是在參閱國內外大量文獻資料的基礎上，學習並採用vlsi的設計和管理思想，提出應用fpga技術使用fft運算進行諧波分析的方案。 -
Thereinto, this paper analyzes and deduces the interpolating windowed fft algorithm in detail, then systematically analyzes the error features and bounds of the algorithm by computer simulation. at the same time, we can obtain some important conclusions of the harmonic analysis applications
其中，對加窗插值的快速傅立葉演算法進行了較為深入的分析與推導，採用計算機模擬全面、系統地分析了該演算法的誤差變化規律以及誤差限，並在此基礎上得出了諧波分析應用中的若干重要結論。 -
This paper proposes a design of automatic feedback suppressor based on dsp : firstly, combining fft algorithm with chirp - z transform to detect feedback rapidly and set up the judging conditions based on the feedback characteristics to locate feedback accurately
本方案具有如下技術特點:第一，採用chirp - z變換（ czt ）演算法與fft演算法相結合對聲反饋進行檢測，並利用聲反饋信號建立前期的時頻特徵，設立判定條件。
分享友人