coherent signal 中文意思是什麼

coherent signal 解釋
相干信號
  • coherent : adj. 1. 緊密地結合著的；凝聚性的。2. （話等）有條理的，首尾一貫的；一致的。3. 【光學】相干的，相參的。
  • signal : n 1 信號，暗號；信號器。2 動機，導火線 （for）。3 預兆，徵象。adj 1 暗號的，作信號用的。2 顯著的...
  1. Non - coherent demodulation of bpsk signal based on time measuring

    信號非相干解調方法
  2. The signal we named it fundamental wave ; according to the fundamental wave, coefficients of the fundamental wave can be lined in a sequence. when the unique of the dissolve of the fundamental wave can be confirmed, the sequence of the coefficients can be regarded as one of representation forms of the signal itself ; theory of dissolvable signal shows that when order of the matrix of fundamental wave sampling equals to number of fundamental waves, the sequence of the sampling values from sampling points must be matched one by one with the sequence of the coefficients of fundamental waves. the sampling composed by sequences of the sampling values must be full sampling ; the relevant deductions of the theory of dissolvable signal shows that when sampling the signal, sampling frequency must be lager than the ratio of the number of fundamental waves to the occupation time of the fundamental waves ; to band - limited signals, when the fundamental wave is a sine signal, the results from the relevant deductions of theory of dissolvable signal is coherent to the classic sampling theory

    本文通過分析認為，當信號集中的任一信號可表示為一系列已知信號的線性代數和時，信號集便構成可分解信號集，已知信號稱為基波信號；對可分解信號而言，基波系數構成一序列，當對指定的基波信號集分解唯一確定時，系數序列本身便是信號的一個表示；可分解信號采樣定理指出當基波樣值矩陣的秩等於基波數時，則由采樣點處的采樣樣構成的樣值序列必與基波系數序列一一對應，從而由該樣值序列構成的采樣必為完全采樣；可分解信號采樣定理中的推論指出，對信號集進行采樣，采樣頻率必須大於其信號分解的基波數與其對應時長之比；對有限帶寬信號，若基波信號為正弦信號時，由可分解信號采樣定理推論給出的結論與經典采樣定理一致。
  3. Wideband ambiguity function ( waf ) is the powerful tool to analyze the wideband signal, and it is also coherent to cwt

    寬帶模糊度函數是寬帶信號分析的有力工具，它與連續小波變換也是內在一致的。
  4. A doa estimation algorithm for coherent signal based on the fourth - order cumulant

    時空欠采樣寬頻段信號頻率和二維角估計方法
  5. Advantages, disadvantages and limits of arm are thoroughly examined using signal processing methods. based on the above, incoherent and coherent two - point - source decoy methods and modified coherent two - point - source decoy methods to deflect arm are brought forward. arm ’ s homing heads are generally of mono - pulse structure, so coherent two - point - source ’ s interference resembles that to mono - pulse radar except that interference to radar belongs to far field scope, but interference to arm varies from far field to near field because relative distance drastically changes between the homing head and the two - point - source with missile ’ s homing head continually approaching the target

    Arm的導引頭一般為單脈沖體制，因此，相干兩點源對導引頭的干擾類同於對單脈沖雷達的干擾，不同的是:對雷達的干擾都是遠場，而導引頭隨著導彈不斷接近目標，兩點源與導引頭的相對位置發生劇烈變化，由遠場變化到近場;導引頭天線口面上的合成場也發生了大的變化，相位波前的畸變產生干擾，這就是相干兩點源誘偏的基本思想。
  6. Realization of quadrature coherent detection by direct sampling of if signal

    直接中頻采樣實現正交相干檢波的研究
  7. Derived from optical waveguide fundamentals, outstanding advantages of mfld in high s / n ratio and sensitivity were theoretically presented. to resolve inconsistent change tendencies of mode - filtered light obtained in bare core sensing system and in modified sensing system, that is, the mode - filtered light signal declines with the increase in analyte ris in bare core sensing system but increases with the increase in analyte ris in modified sensing system, we started with light energy radiation theory, and obtained the details of mfld mechanism by discussing in detail the radiant energy ' s reflection and refraction at the interface, thus establishing a mathematical model of mfld. we concluded that the inconsistent change tendencies of mode - filtered light were essentially coherent

    為了解決實驗中裸光纖體系與修飾光纖體系在獲取模式濾光信號上出現的不一致現象，即裸光纖體系中隨著分析對象的折射率增大，獲取的模式濾光信號呈下降趨勢，而在修飾光纖體系中分析對象的折射率增大，獲取的模式濾光信號卻是增大的，我們從光的能量輻射學入手，詳細地討論了光輻射能在傳輸路徑上的反射與透射，獲得了模式濾光信號產生的細節，以此建立了模式濾光檢測的新模式。
  8. Radar if signal sampling and engineering implementation of digital coherent detection

    雷達中頻信號采樣及數字相干檢波的工程實現
  9. Presents the development of modern signal processing techniques, a new implementation method which realizes quadrature coherent detection by direct sampling of if signal generated during the implementation of traditional quadrature coherent detection with analog elements in the form of two parallel baseband channels where in phase ( i ) and quadrature ( q ) components of ceived if singnal where, the imperfect matching of the separate channels due to the analog elements results in high phase and amplitude which meets the needs for high performance radar signal processing, the elementary principles and the implementation process for each method and concludes from simulation results to compare their features and application conditions that the new approach can satisfy of the requirements of high performance sp

    針對近年來提出的通過直接中頻采樣來實現正交相干檢波的方法，分析了其基本實現原理，並用統一的觀點解釋了迄今為止國內外基於此提出的各種實現方法；對每一實現方法的基本原理和實現過程都作了分析，並給出了計算機模擬結果；在此基礎上比較了各方法的性能指標及適應條件.理論分析和模擬結果證明，這一方法完全可以滿足高性能信號處理的要求
  10. Direction of arrival estimation of wide band sources with small array based on beam - space coherent signal - subspace method

    基於波束域相干信號子空間法的寬帶源小尺度基陣定向
  11. 3. the typical wideband high - resolution method - the coherent signal subspace method ( cssm ) is studied

    研究了寬帶高分辨陣列信號處理的典型演算法? ?相干信號子空間演算法（ cssm ： coherentsignalsubspacemethod ） 。
  12. However, as to correlated especially coherent signals and adjacent signals with small signal to noise ratio ( snr ), music algorithm cannot estimate their doa

    然而，對于相關信號（特別是相干信號）以及相隔比較近的小信噪比信號， music演算法卻分辨不了它們的doa 。
  13. Once stored, the signals can be transcribed back into an exact replication of the original signal whenever desired. ultra high speed data acquisition is the main technique in drfm. the most common use of the drfm is for replication of complex, coherent signals usually representing radar return signals

    數字射頻存儲器是現代電子對抗系統中有源雷達干擾機的主要組成部分，用於將接收到的雷達信號的精確的復制信號返回該雷達系統，以此來混淆該系統。
  14. Information of system auto and cross spectrum, auto and cross correlation. coherent function, signal to noise ratio, frequency response and impulse response was established to help the study and arrangement of the module components

    由力規及加速規兩量測之時域訊號，經快速富利葉轉換，計算其自頻譜及互頻譜，再經反富氏轉換回時域之自相關及互相關函數、相通函數、訊噪比、頻率響應函數、脈沖響應函數。
  15. Time domain synchronous averaging can reduce the signal not coherent to rotation frequency effectively, and extract the repetitive signals directly related to machine operation condition

    而時域同步平均可以有效衰減與回轉頻率無關的干擾，提取與工作狀態直接相關的周期信號。
  16. In the subsystem of signal processing, digital sidelobe cancell block, digital pulse compress block, adaptive clutter canceller block, doppler filter and constant false alarm rate block are respectively discussed and set up. in signal processing, data in the same coherent processing interval form a matrix, and the data processing was completed based on the matrix. data are processed with the row vector or column vector respectively when needed

    在信號處理分系統中，將脈沖壓縮得到的數據在各個相干處理區間進行處理，將一個相干處理區間的數據按照不同的脈沖重復周期和不同的距離單元排列成一個矩陣，當需要實現數字脈沖壓縮時對矩陣的各行（同一個脈沖重復周期的數據）進行處理，當需要實現多普勒濾波時，就對矩陣的各列（同一個距離單元的數據）進行處理。
  17. In the paper, a coherent video signal simulation is applied to model and simulate a pulse doppler radar seeker

    本文採用相干視頻信號模擬方法對脈沖多普勒雷達導引頭進行了建模和模擬研究。
  18. The theoretical analysis show that the nonlinear absorption for the probe light in the coherent atoms increases rapidly from zero to the steady state through a transient process when signal light is switched on

    計算表明在信號光開啟后的瞬間，介質對探針光的非線性吸收從接近於零的狀態迅速增加，經過一個短暫的瞬態過程到達穩態。
  19. At the same time the case of coherent signal sources is also discussed and an algorithm for estimating 1 - d angle - of - arrival from under - sampled data is proposed in the thesis. moreover, a system of digital signal processing receiver using spatio - temporal undersampling technique is described and some practical problems are also discussed

    在理論分析的基礎上，結合某實際研究項目，論文給出了基於空時欠采樣條件下一種偵察測向數字信號處理機的硬體實現，並就工程實現中的一些問題進行了討論。
  20. So far, there is not much research on the signal detection of da - mimo system, and the general frequency selective channel is not taken into consideration. in chapter 3 of this dissertation, the coherent signal detection algorithms for da - mimo system under both flat fading and frequency selective fading channels are derived. and the analysis of the factors which affect the performance of the detection algorithms is also illustrated through computer simulations

    針對分佈mimo信號檢測目前研究較少，並且沒有考慮一般意義下的頻率選擇性通道的情況，本文在第三章分別推導了基於平坦衰落和頻率選擇性衰落通道環境的分佈mimo信號相干檢測演算法，並通過計算機模擬，對影響演算法檢測性能的因素進行了分析討論。
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