differential detection 中文意思是什麼

differential detection 解釋
差動探測
  • differential : adj 1 差別的，區別的；特定的。2 【數學】微分的。3 【物、機】差動的，差速的，差示的。n 1 （鐵路不...
  • detection : n. 1. 探知；發現，發覺；敗露。2. 【化學】檢定，檢查；【電訊】檢波。
  1. Two fundamental approaches, differential optical absorption spectra ( doas ) and wavelength modulation harmonic measurement, for gas light absorption detection are discussed

    分析了波長調制諧波檢測技術和差分吸收檢測技術兩種弱信號檢測方法。
  2. In this paper, research on the algorithm of complete digital if and baseband transmission system and the realization of transmitter and receiver. / 4 - dqpsk is chosen as digital modulation scheme. the scheme of demodulation is baseband differential detection. sliding correlator can realize the symbol synchronous acquisition ; early - late gate synchronizer is used to do symbol synchronous tracking

    系統的發射機選定/ 4 - dqpsk為調制方式，接收機採用基帶差分解調的非相干解調方式，滑動相關器捕獲發送的pn序列，早遲門同步器跟蹤符號同步，使用相關器對同步后的符號進行最佳判決，並在這些演算法實現的基礎上，實現了直接序列擴頻和解擴技術。
  3. There are many methods of edge detection. according to practical task, we choose some classical methods of edge detection including first differential ( roberts operator, sobel operator and prewitt operator ), second differential ( laplacian operator and kirsch operator ), log filter and canny operator. they are studied in theory and practice applying

    邊緣檢測有很多方法，根據課題實際背景，選擇了幾種比較經典的邊緣檢測方法，即一階運算元（ roberts運算元、 sobel運算元、 prewitt運算元） 、二階運算元（ laplacian運算元和kirsch運算元） 、 log運算元和canny運算元，對他們進行理論和實際應用研究。
  4. However, on the other hand, compared with coherent detection, differential detection comes with an evident loss of performance

    但相比于相干檢測，差分檢測在性能上也會有相當的損失。
  5. Because of the simplicity of differential detection system, we could consider to apply it to the selective fading channels instead of coherent detection

    由於差分檢測的簡單易實現性，當通道衰落比較嚴重時，可以考慮採用該方法替代相干檢測。
  6. In this thesis, we focused our attention on demodulation and digital signal processing ( dsp ) technique in the dpsk differential detection system used in pico - satellite test and control instructions, mainly from the point of view of software

    論文圍繞皮衛星通信中測控指令的dpsk差分解調系統，重點從軟體角度對通信解調技術和數字信號處理的一系列問題進行了實踐和研究。
  7. This thesis researched the time synchronization method for 2d - ss system, and deeply discussed the bit error rate ( ber ) performance of multicarrier domain spread spectrum chip - level differential detection ( mc - ss - cldd ) in the presence of multi - user interference

    本論文從多載波擴頻通信系統出發，提出了廣義二維擴頻系統的同步演算法，並對多載波頻域擴頻碼片級差分檢測技術在多用戶情況下的系統性能進行了深入的研究。
  8. The method and performance according to the requirements are resolved mostly. main contents as follows : ( 1 ) according to the demodulation guideline, a differential detection system is applied to the dpsk signal demodulator, which is based on the analysis and comparison using the principle of optimal binary signal detection

    著重解決在皮衛星體積結構，重量和功耗限制條件下的方案選擇和性能問題，具體內容包括： （ 1 ）對一般二進制信號的最佳檢測原理進行分析比較，針對本系統要求選擇了dpsk信號差分檢測系統的方案。
  9. ( c ) propose the scheme to implementing the coder and deoder of optical time - spreading / frequency - hopping, by assigning two orthogonal codes for one user and using these two codes to encoding 1 and 0 respectively, differential detection can be adopted. not only improves system performances in ber, but also resists the interference such as mai, and does n ' t need any control devices to evaluate the optimum decisive threshold

    通過給每個用戶指定互相關為0的兩個地址碼分別發送1和0信號以及在接收端採用差分檢測技術，避免了ook （開關鍵控）光通信系統中0不發送光脈沖和ook常規檢測方式下最佳判決門限必須根椐用戶數等外界環境而改變，從而提高了系統性能和降低了系統的復雜度。
  10. The main characteristics and advantages are : on one hand, we adopted the low - complexity bussgang algorithm, and did blind estimation to ofdm sub - channel according to the mean square error criterion ( mse ) and peak distortion criterion ; on the other hand, we used the differential detection, which accelerates the convergence speed and avoid the error transmission problem resulted from the bussgang algorithm

    這兩種演算法一方面採用了低復雜度的bussgang自適應演算法，分別依據均方誤差準則和峰值失真準則對ofdm系統子通道進行盲估計；另一方面通過引入差分檢測技術，加快了演算法收斂速度，克服了bussgang演算法帶來的誤差傳播問題。
  11. In order to make up this gap, this paper presents a differential detection scheme that serial concatenate a ldpc code to form a iterative detection cycle. moreover, under different channel conditions, simulations show that this scheme can improve the differential system performance considerably, of which may be meritorious to the applications

    所以針對這種情況，本文在第四章提出了一種級聯ldpc碼的turbo差分檢測方案，並通過模擬說明，在級聯不同碼率的ldpc碼下，該方案都可以使差分系統獲得明顯的性能增益，具有一定的應用價值。
  12. A / d samples the intermediate frequency signal. the digital signal proceeding part based on tigersharc dsp can process the baseband digital signal including the algorithm of baseband modulation, baseband differential detection and symbol synchronization, etc. digital up converter supports interpolation filter and complex mixer

    A / d對中頻信號進行采樣，數字信號處理部分以tigersharcdsp為核心，負責基帶采樣數字信號的處理，實現基帶信號調制，基帶差分解調，符號同步的捕獲和跟蹤等演算法。
  13. This dissertation focuses on the application of data fusion in two - phase flow regime identification. following is the main contribution of the dissertation. 1 ) based on quartile and first order differential, a new outlier detection algorithm is presented, experiments show that the method combining with low pass filter can remove gross error and unwanted frequency components

    本文的主要工作與創新點在於： 1 ）將分位數方法與一階差分法相結合，提出了一種基於一階差分的粗差剔除方法，該方法與低通濾波器的結合可以有效去除兩相流壓力波動信號中的粗大誤差以及信號頻帶以外的頻率成分。
  14. The investigators attribute the risk increase to increased detection of latent cap due to differential diagnostics of bph

    研究者將風險的增加歸因於由於對前列腺增生進行鑒別診斷時潛伏癌的檢出增加。
  15. Some critical coding and modulation techniques in uav communication have been discussed in this thesis, including differential phase keying ( dpsk ), modulation multiple symbol detection ( msd ), adaptive trellis coded modulation ( atcm ), and space - time coding. this work was supported by the national defense 973 project. uav communication has many sophisticated technologies

    本論文在國防973項目「無人機信息傳輸理論與方法研究」的資助下，結合現代數字通信領域的新技術，根據無人機通信的特點和需求，對其中的幾項關鍵技術做了深入研究。
  16. Firstly, the classic methods of image edge detection are introduced, including differential coefficient which are roberts image edge detection, sobel edge detection, and prewitt, robinson, kirsch image edge detection, and second - order differential coefficient which are laplacian edge detection and log edge detection. finally analyzed the experiment results of these methods application on a picture

    介紹了經典的圖像邊緣檢測方法，包括一階微分邊緣檢測的roberts邊緣檢測， sobel邊緣檢測和prewitt ， robinson ， kirsch邊緣檢測，以及二階微分邊緣檢測的laplacian邊緣檢測和log邊緣檢測，並通過實驗的方式比較了這些圖像邊緣檢測運算元的實際效果。
  17. Alongside conventional test procedures like water bubble test and the differential pressure test, our particular speciality is the leak detection by means of carrier gas, where our principle focus is on helium leak detection

    在傳統的諸如水泡測試法和壓差測試法之外，我們的特殊專長是用氣體載體- -氦氣- -來發現泄漏。
  18. In the second part, the necessity of employing differential demodulation in rapid changing channel was explained, performance of multiple symbol detection of mdpsk and decision feed back multiple symbol detection were analyzed. then we present a new differential demodulation algorithm. the decision data is used to recover the carry phase. given the same observation intervals, this demodulation algorithm has almost the same performance, but the receiver is much more simplified

    第二章首先指出了通道參數變化劇烈的情況下，採用差分解調的必要性；分析了多碼元差分解調和數據判決反饋解調演算法的性能和抑制噪聲的能力；在此基礎上提出了一種新的差分解調方案：利用判決數據輔助進行載波恢復，即在判決數據的輔助下，採用fir （ finantimpounsrespouns ）結構對載波相位進行預測的一種演算法，精心設計了該演算法的實現結構。
  19. Robust joint channel estimation multiuser detection with differential modulation in ds cd - ma systems

    系統的通道估計與檢測方案
  20. In this paper, the differential astigmatic detection method for defocus measurement with one - way defocused detector is developed from the conventional differential astigmatic detection

    本文在傳統差動像散檢測方法基礎上，給出一種基於單向離焦的差動像散檢測方法。
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