tdoa 中文意思是什麼
tdoa
解釋
到達時間差-
Simulation of hypsometry accuracy using 4 - station tdoa
四站時差定位測高精度的模擬研究 -
Then we present a toa / tdoa data fusion model based on mathematical statistics for radiolocation in cellular network, and fuse toa / tdoa measurements through a best linear fusion method and a mobile position based dynamic location algorithm, which shows good performance of robustness and accuracy
然後，從數理統計的角度出發，構造了一個toa和tdoa進行位置估計的數據融合模型。主要利用一種最佳線性融合策略和基於移動臺位置的動態定位演算法對toa和tdoa測量數據進行融合，有效的提高了演算法可靠性和準確度。 -
In order to improve adaptability and robustness of algorithms, we present another toa / tdoa data fusion algorithm based on support vector machine regression for radiolocation. then we test the capability of location estimation algorithm in distinct channel environments, the results suggest that the location precision within 100m is accessed with 67 % probability by this method
為了提高定位演算法的健壯性和自適應能力，論文提出了一種基於支持向量回歸（ svr ）對toa / tdoa進行數據融合的方法，並對演算法在不同的通道環境下的定位性能進行了模擬。 -
Meanwhile, under the condition of continuous wave radiant, how to get the time difference precisely in the low signal noise ratio become another problem. the paper firstly introduce basic principle of the tdoa location technology while the merits and demerits is also given
同時，電子戰中不僅有大量脈沖輻射源，而且還有連續波輻射源的現狀使得怎樣在信噪比較低的條件下準確無誤得到輻射源的時差也是該領域一個難點。 -
Finally the localization performance of the new estimator and the ls estimator when one station is raised and the traditional four station three tdoa localization estimator were compared
比較了採用單站升高條件下新定位演算法與最小二乘定位演算法以及傳統四站三時差定位演算法的定位性能。 -
First the traditional four stations three tdoa localization estimator and the five stations four tdoa localization estimator in the condition of one station is raised were analyzed, and then the simulation result was given
對傳統的四站三時差定位演算法與單站升高體制下五站四時差定位演算法進行了理論分析，並給出了模擬結果。 -
The key problem to be solved in multi stations tdoa system is spatial and time synchronism between stations, weak signal detection and solution for high precision location equation
多站時差定位系統也有其自身要解決的關鍵技術和難點:多接收站之間的時間、空間的同步問題，目標回波的弱信號檢測問題，高精度的定位方程組求解方法。 -
Referring to the classical location method attributed to geiger, this paper brings up a scheme according to energy tracking and time difference of arrival ( tdoa ) theory to the position location of the survivor. and proves the feasibility of this scheme through a series of experiments
參照經典的地震定位方法（ geiger法） ，提出了一種基於能量追蹤和時差定位的生命搜索定位技術方案，並且通過模擬實驗和計算，論證了該方案的可行性。 -
In chapter there in the paper, the author analyzed the tdoa extraction technologies can be used in the pulse radar target detection and location technology
其中對于基波信號時差提取技術的研究，在「地震救助生命搜索與定位技術研究」課題中有關定位技術的應用中取得較好效果。 -
The study in this paper based on the national fifteen tackling key problem - " life detection and orientation of earthquake emergency response system " and project of no. 10 research institute of china electronics technology group corporation - " pulse radar target detection and location technology ", has completed the study and simulation of the relative technology of tdoa, which was a theoretical and technological supporting to the two projects
本論文在國家十五重點科技攻關課題「地震救助生命搜索與定位技術研究」和中國電子科技集團第十研究所「脈沖輻射源監測和定位技術」國際合作項目中，完成了對其中時差定位相關技術的研究和模擬，為工程項目的實施提供理論和技術支持。 -
The analysis is also given on the sphere of application, the complexity of computation. after the extraction of the precise tdoa signal, it is the major problem
在提取到準確的時差信號后，論文第四部分就如何獲取精確的目標輻射源位置，即定位演算法進行了研究，主要分析了非線性定位方程組的求解技術 -
Based on the analysis of the isoline of the doppler - range algorithm and tdoa - tdof algorithm, the rule to select positioning satellites is proposed
分析了doppler - range聯合定位及tdoa - tdof聯合定位的測量等值曲線特徵，並據此提出了定位衛星的選取策略。 -
In order to reduce measure error causing by nlos, it adopt and regard intensity of the signal as right value, construct some tdoa measurement value again with the priori information
為了減少非視距傳播nlos引起定位參數測量誤差，採用以信號強度為權值，用先驗信息重構部分tdoa測量值。 -
In order to reduce the adverse influence of nlos error to location performance, this algorithm firstly makes initial mobile position estimation by mean tdoa / toa measurements, then estimates nlos error within tdoa / toa measurements by parameters of tip 1 channel model, smoothes and reconstructs tdoa / toa measurements, and finally utilizes two step wls computation. the application of this algorithm under different cellular environments is also discussed and its effectiveness is demonstrated by simulation results. finally, the basic location method, location method implementation, network architecture, signaling protocol and interface, and location procedures of wcdma network mobile location are analyzed
百臼主回大學槽士扭允生攀幢伍丈第v頁接著，通過對tdo咖a測量值誤差的分析，本文提出了一種首先利用tdo咖a平均測量值對移動臺位置進行初始估計，並利用tipi通道模型參數估計出thoafl 』 oa測量值中nlos誤差的大小，然後對tdo … a測量值進行平滑與重構，再採用兩次wls計算，以降低nlos誤差對定位性能不利影響的的定位精度提高演算法，討論了這種演算法在蜂窩網路不同環境條件下的具體實施方法，通過詳細模擬驗證了這種演算法的有效性。 -
A new passive localization estimate algorithm of time difference of arrival ( tdoa ) to improve the accuracy of target localization was proposed, and the ambiguity and unsolvable problem were solved
摘要給出了新的定位演算法以提高對目標的定位精度，解決了模糊和無解的問題。 -
Tdoa system is also featured in the capacities, such as inherent anti - interference, anti antiradiation missile, anti low - level defence and anti invisible weapons and it does not exist location hole for it does not have power overlay and clutter
具備先天性抗干擾、抗反輻射導彈、抗低空突防和反隱身的綜合「四抗」能力。由於沒有能量覆蓋和雜波問題，理論上不存在探測盲區。 -
Secondly, based on the limitations of single location technique and the characteristics of chan and aoa algorithins, a hybrid tdoa / aoa and a toa / aoa location algorithin are proposed, and the corresponding carb theoretical bounds of these algorithms are derived
其次，通過分析單一定位技術的局限性，基於chan演算法和aoa演算法特點，提出了一種tdoa aoa混合定位演算法和一種toa / aoa混合定位演算法，給出了這兩種演算法定位性能的crlb理論界。 -
In 3g communication system, the most promising location method was the locating arithmetic based on the time of arrival and the time difference of arrival ( toa / tdoa ) of signal, or the angle of arrival of signal ( aoa ). however, either the arithmetic based on toa or that based on aoa was badly affected by the none line of sight ( nlos ) phenomenon
在第三代移動通信系統中，最有前景的定位方式是基於信號到來時間/時間差（ toa / tdoa ）或信號到來角（ aoa ）的定位演算法。但不管是基於信號到來時間的演算法還是基於信號到來角度的演算法，定位信號的非視距傳播效應（ nlos ）都會對其造成嚴重的影響，在影響移動定位精度的諸多因素中nlos效應被公認為是最主要的因素。 -
It is widely adopted in a lot of applications, such as multimedia conference, intelligent robot, speech enhancement, etc. adaptive eigenvalue deposition algorithm aeda is one of the effective methods for its robustness performance of noise and reverberation. however, aeda is suffered from its slowness in tracking variation of time delay of arrival tdoa as well as its sensitivity to initial value
針對傳統的自適應特徵值分解時延估計演算法收斂時間慢對初值敏感以及不能有效跟蹤時延變化等問題，提出了一種改進的自適應特徵值分解時延估計演算法，該方法通過改進初值設定方法，有效改善了對時延變化的估計。 -
Based on the features of modulate - wave and unmodulate - wave, different methods being suitable for these two kinds signals is respectively discussed by theory and simulation. the result of simulation can be used in the practice. in this chapter, the research about the tdoa extraction method of the unmodulate - wave is also the relevant technologies needed to be study in the " life detection and orientation of earthquake emergency response system "
論文第二部分重點對連續波信號的時差提取技術進行了系統的分析研究，從連續波信號時差提取的各種方法的信號模型與原理出發，利用調制波和基波信號的特點，通過理論分析和模擬比較，分別分析了適用於這兩種信號的時差提取方法及其相關技術，為工程實現提供參考。
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