frequency domain estimation 中文意思是什麼

frequency domain estimation 解釋
頻數估計
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • domain : n 1 領土，版圖；領地。2 管區，勢力圈；（特定動物等的）生長圈；（學問、活動等的）領域，范圍；【物...
  • estimation : n. 1. 估計，評價。2. 預算，預算額；概算。3. 尊重，尊敬。4. 意見，判斷。5. 【化學】估定；測定。
  1. At first some modification is made in conventional beam forming of frequency domain, namely to estimate doa by arrays outputs on compensated spacial frequency points of echoes. then the cwt is utilized to signal processing in space - frequency domain for estimation of doa, and the corresponding modification is also made. in the dissertation, the computer simulations of doa estimation for both narrow - band and wide - band echoes are given, so do the necessary comparison among several methods and crb

    首先在傳統的頻域波束形成演算法的基礎上，提出對寬帶信號的頻率補償，也即對寬帶回波信號的各空間頻率根據時間頻率的差異進行相應補償，然後對各陣元輸出求和來得到方位估計；其次將連續小波變換引入到空間?頻率處理中，從而完成對目標方位的估計，並進行了相應地補償。
  2. This thesis mainly discusses the techniques of channel estimation in frequency domain, which utilizes the optimized leading sequence. an enhanced method for searching optimized leading sequences is introduced based on existing documents. this method can decrease the errors and make the searching and caculating easier

    本論文主要討論用最佳前導序列在頻域中進行通道估計的問題，在前人的基礎上提出一種改進型的搜索最佳前導序列的方法，可使得估計誤差減小且便於搜索計算，模擬驗證了演算法的有效性。
  3. As follow : 1. two solutions of estimating the doppler centroid are put forward. we processe the doppler centroid estimation in the frequency domain and time domain. also this chapter discusses principle of the doppler centroid estimation

    本文主要研究了多普勒參數估計及波數域演算法，主要有以下幾個方面: 1 .闡述了多普勒質心估計的兩種方法:頻域估計法和時域估計法。
  4. A time - frequency domain method for carrier frequency estimation 2

    提出了用時頻理論來估計載波頻率和位同步信息。
  5. Channel estimation in single - carrier frequency domain equalization system

    多載波通信系統中的應用
  6. ( 3 ) features of turbopump test data both in time domain and in frequency domain are analyzed using statistical estimation methods. the value of applying these features into nd is discussed

    （ 3 ）應用統計特徵估計方法，分別對渦輪泵試車數據的時域特徵和頻域特徵進行了統計分析，並討論了這些特徵在新異類檢測中的應用價值。
  7. Then analyze the motion and dynamics ; induce the dynamics equation ; use multiple - step gear estimation and correction to solve the time domain ; use equivalent method of statistical linearization to solve the frequency domain

    進行了運動學分析和動力學分析，推導了動力學方程，採用多步gear預估?校正法進行時域求解，採用等效的統計線性化方法進行頻域求解。
  8. Frequency - domain equalization. at the same time discusses some key problems in ofdm : high ratio of peak - to - average power of output signals, problem of synchronization, channel estimation, adaptive bit, power and subcarrier allocation. emphasize on channel estimation, and present a new algorithm which can filtering more interpolation errors and noise. for the sake of improve the performance of resist narrowband noise and make efficient use of the spectrum apply malvar wavelet division

    同時就ofdm系統中的一些關鍵問題如峰值平均功率比（ papr ）太高，同步問題，通道估計，通道、比特與功率必須動態分配進行了研究，著重研究了通道估計問題並提出一種改進的方法，能濾除更多的噪聲分量和插值誤差，提高系統的性能；為了提高抗窄帶噪聲的性能和提高通道利用率，用malvar小波變換實現了不等帶寬分配。
  9. Based on the analysis of echo signal and ambiguity function of lfmcw radar, this dissertation advances new theories of lfmcw radar signal detection and estimation and eliminates range - velocity coupling using mtd - frequency domain pairing

    在對lfmcw雷達回波信號和lfmcw雷達模糊函數進行分析的基礎上，提出了lfmcw雷達目標檢測與參數估計方法，並利用mtd -頻域配對法消除lfmcw雷達距離-速度耦合。
  10. Topics covered include : frequency domain and state space techniques ; control law design using nyquist diagrams and bode plots ; state feedback, state estimation, and the design of dynamic control laws ; and elementary analysis of nonlinearities and their impact on control design

    所涵蓋的項目有:頻域與狀態空間之技巧;用奈奎士圖與波德圖來設計控製法;狀態回授，狀態估測與動態控製法之設計;與非線性的基本分析和它在控制設計上的影響。
  11. Based on the coherent reception theory of radio signals and the theory of digital signal processing, the effects of carrier frequency offset, sampling clock offset, and symbol timing offset on ofdm signals are exploited. a series of amendments and new algorithms is derived from the in being algorithms of guard interval based symbol timing and frequency offset estimation, frequency - domain frequency offset, sampling offset, and symbol timing offset estimation

    以無線信號的相干接收和數字信號處理理論為基礎，就載波頻偏、采樣鐘偏差和符號定時偏差對ofdm信號的影響進行了分析，對基於保護間隔的符號定時與載波頻偏估計演算法和多種現有頻偏、采樣鐘與符號定時偏差的頻域估計演算法進行了研究，提出了一系列改進措施與新演算法。
  12. The maximum likelihood estimator ( mle ) approach is an important one in frequency estimation domain. this approach has the merit such as exhibiting best performance and requiring minimum threshold of signal noise ratio in calculation

    最大似然頻率估計法是該領域中的一種重要的研究方法；該方法具有估計結果準確，計算所要求的信噪比門限值低等特點。
  13. Furthermore, this paper exploringly studies an 802. 1 la high - speed wlan with the 54mbps data rate, and presents a sort of time synchronization and frequency offset estimation method based on the frequency domain auto - correlation of the unique preamble training sequence of 802. 11 plcp frame ; the method have the high time precision, the wide frequency estimat ion range and short convergence process ; and moreover, it can applied to other frame communication system

    另外本文還對最高傳輸速率為54mbps的802 . 11a高速無線局域網系統進行了探索性研究，討論了ofdm調制技術在無線局域網中的應用；結合802 . 11a物理層數據幀結構特點，提出了一種基於前導訓練符號序列的頻域自相關時間和頻率同步方法，此方法具有定時精度高、頻偏估計范圍寬和同步建立迅速等特點，也適合於其它幀通信應用場合。
  14. Two - dimensional frequency estimation based on nonlinear prefiltering in frequency domain

    二維諧波頻率的頻域非線性預濾波估計方法
  15. The principle and characteristics of ofdm system are introduced first. then several key technologies of channel estimation and equalization for ofdm are discussed in detail, including pilot signal based channel estimation methods, cyclic prefix based channel estimation method, frequency domain adaptive filtering method and time domain equalization method for long channel impulse. the corresponding comparison and simulations are also provided

    文中討論了利用導頻信號的通道估計方法，利用循環前綴進行通道估計的方法， ofdm信號均衡中自適應濾波技術，及通道沖擊響應長于循環前綴時利用時域均衡減少解調器輸入信號拖尾長度的方法，分析了這些方法的原理，並通過計算機模擬驗證了這些方法的性能。
  16. In this paper, fsk signal of power remote is analyzed in time - domain and frequency - domain. based on the analysis, a new method to detect carrier frequency of fsk signal named time - domain joint and modern power spectrum estimation is put forward

    對電力遠動通道fsk信號進行了時域和頻域分析，在此基礎上提出了一種新的fsk信號載波頻率測量方法?時域拼接結合現代功率譜估計的方法。
  17. And according to the characteristics of the noise, we provided some algorithms : wiener filter based on noise characteristic, multi - threshold wavelet filter, temporal - spatial - frequency domain combined filter based on the motion estimation

    並根據噪聲的特點，提出了基於噪聲特徵的wiener濾波方法、多閾值小波濾波器、基於運動估計的時空頻域相結合的濾波方法。
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