估算性能 的英文怎麼說

中文拼音 [gūsuànxìngnéng]
估算性能 英文
estimated performance
  • 估 : 估構詞成分。
  • 算 : Ⅰ動詞1 （計算數目） calculate; reckon; compute; figure 2 （計算進去） include; count 3 （謀劃;計...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 能 : 能名詞（姓氏） a surname
  • 估算 : estimate; reckon （up）
  1. A good algorithm is one that has a low computational complexity, provides a high quality of motion compensation and also ensures that the bitstream is as small as possible

    一個好的運動估計方法應當是：估計性能高、計算復雜度低、比特傳輸速率低。
  2. Methods of estimating baud rate, signal to noise ratio ( snr ) and reference phase are investigated. a modified euclidean algorithm is proposed to estimate baud rate of the burst packets. a cumulant based algorithm of estimating snr of star - qam is proposed which has better estimation performance in medium scope of snr

    研究了自適應調制中波特率，信噪比和載波相位等參數的估計演算法；提出一種基於修改的歐幾里得演算法的波特率估計演算法，這種演算法可以對突發分組的波特率做出準確估計；提出一種星型qam信號的信噪比估計演算法，在中等信噪比條件下，具有較好估計性能。
  3. The computer simulations indicated that the weighted subspace fitting technique in the beamspace possessed a significant advance of 2 - d estimation for coherent sources

    計算機模擬表明，在波束空間內的加權子空間擬合技術具有良好的相干信源二維波達方向估計性能。
  4. The problem of doa ' s estimation of multiple source signals incident on a arbitrary array in the presence of both unknown spatially correlated noise and sensor errors is firstly considered. a modified ml estimation of doa ' s and sensor gain errors is presented. unlike previous work, the proposed method does not impose any structure constraints or parameterization of the signal and noise covariances. the algorithm can be carried out via the alternating projection approach. finally, the performance of the proposed method is shown with computer simulations as well as real array data

    在空間相關色噪聲環境及存在陣列模型誤差情況下，首先給出了基於最大似然的doa及陣列幅相誤差聯合估計演算法，該演算法對信號和噪聲無任何約束，且適用於任意陣列結構。演算法可以利用交替投影迭代搜索實現，計算機模擬實驗和外場實測數據表明，本章演算法能給出比傳統的最大似然方法更高的估計性能。
  5. Aiming at the lower performance and floor effect of the traditional orthogonal frequency division multiplexing channel estimation, the ofdm channel estimation algorithm based on wavelet recursive least square support vector machine ( wrls - svm ) is proposed

    摘要針對傳統多徑衰落下的ofdm導頻通道估計性能低下，地板效應的缺陷，提出了基於導頻的小波遞歸最小二乘支持向量機（ wrls - svm ）時變通道頻率估計演算法。
  6. It significantly outperforms an array of spatially displaced pressure hydrophones of comparable array - manifold size and computational load but may involve more complex hardware

    與聲壓傳感器組成的陣列相比，相當的陣列尺寸和計算負載的條件下，大大提高了估計性能。
  7. Based on theoretical studies on these algorithms, by means of computer simulation and the water tank experiment, we analyzed the performance of these algorithms in uniform linear array, which included the separation and reconstruction of source signals and doa estimation performance

    在詳細分析各種演算法內在機理的基礎上，針對均勻線列陣，通過大量的計算機模擬實驗與水池實驗數據處理結果，分析、討論了幾種演算法對目標源信號的分離、捕獲能力以及方位估計性能。
  8. In the end, the wcdma downlink channel model simulated with simulink. the simulation results show that the new method has the better performance over other methods both in the low fading channels and in the high speed mobile environment

    模擬結果表明，改進的基於碼片級的自適應變步長lms通道估計演算法，在低速與高速移動環境下均有良好的通道估計性能。
  9. Comparing with si ( sin ( x ) / x ) interpolator, cubic interpolator with low pass filter, and winner interpolator in 16qam ofdm system both in mean square error and bit error rate without encoding, the results of the method proposed by this thesis show that the performance is better than si interpolator and cubic interpolator with low pass filter, and close to the winner interpolator but the complexity is much lower than the latter

    在16qamofdm系統中，將其與帶低通濾波器的si （ sin （ x ） / x ）插值法、 cubic插值法和winner插值法進行了通道估計的均方誤差和無編碼的誤比特率的模擬結果進行了比較。結果表明，本方法的估計性能優于si和cubic插值法，接近優化的winner插值法，但其計算復雜度與winner插值法相比卻大大降低。
  10. Finally, the location accuracy obtained from the improved ekf shows better performance than the fore one in simulations, even in the case of non light of sight ( nlos )

    模擬結果顯示，優化后定位估計性能比優化前的演算法性能有顯著改善。
  11. Based on robust filtering theory, this paper develops polytopic models of uncertain multisensor system and centralized robust fusion estimation by linear matrix inequality ( lmi ) method, and proves the exact transforming condition, by which robust centralized estimation can be transformed to the distributed fusion method with the same fusion estimation performance

    本文以魯棒濾波理論為基礎，給出了不確定多傳感器系統的多胞型描述模型，並利用lmi方法給出集中式魯棒狀態融合估計問題的解，證明了將集中式魯棒融合估計轉化為相同估計性能的分散式融合估計演算法的條件。
  12. A new method for doa estimation in certain nonstationary environments is presented in chapter 4. the maximum likelihood ( ml ) estimations of doa ' s of multiple rapidly moving sources is derived and the theoretical variance of angle estimation and the corresponding cramer - rao lower bound ( crlb ) are also given. its simulations show that this parametric technique is able to resolve closely spaced sources

    提出了一種非平穩環境下的最大似然doa估計方法，該演算法適合於時變doa的情形，並分析了其參數估計性能，給出了角度估計的漸進方差的解析表達式，表明了常規的最大似然doa估計是本文的一特殊情形。
  13. For symbol synchronization, a filtering and squaring algorithm of estimating the timing error has been introduced, and a method to improve the accuracy of estimated data has been presented, then two signal interpolation filter have been analyzed, one is fir interpolation filter, another is cubic interpolation filter

    對于全數字接收機中符號定時誤差的恢復，先介紹了一種濾波平方后求符號定時誤差估值的演算法以及一種提高該演算法估值性能的改進方法，接著介紹了糾正定時誤差的fir插值濾波器和立方插值濾波器。
  14. Meanwhile, high - resolution technique is an important aspect of array processing. aiming at application in engineering, the beamspace high - resolution direction - finding theory, methods, and important problems in realistic scenarios are studied in this paper. main research results and achievements are summarized as follows : 1

    概括起來，本文的主要研究工作及研究成果如下：一、論述了陣元域高分辨方位估計方法的理論，給出了5種典型高分辨方法music 、 mini - norm 、 root 、 music 、 esprit和mode的公式及演算法實現，並給出了完整的方位估計性能評估指標。
  15. Based on the normal equation algorithm to fir system identification and wavelet iteration, a method to estimate the wavelet from the third - order cumulant of field data is developed. due to the fact that higher order cumulant retains the phase information of the signal, and can suppress the gaussian noise ( color or white noise ) naturally, we can improve the time resolution via inverse filtering the wavelet estimated

    本文在基於高階累積量的fir系統辨識基礎上，利用觀測信號的三階累積量對探地雷達子波進行估計，提出一種簡單的迭代演算法改善了波估計性能，據此進行反褶積，改善反射信號的信雜比和時間解析度。
  16. The research work will be in two aspects : in the background of uncorrelated noise and background of correlated noise. moreover, in this paper, we assume the delay to be static

    文中將從非相關背景噪聲和相關背景噪聲兩個大方面入手，來分析靜態時延下上述三種演算法的時延估計性能。
  17. From the analysis in theory, in the background of uncorrelated noise, the algorithms of lmstde, etde and etdge have good property in estimating delay. in the background of correlated noise, the lmstde is failed, but the etde and etdge can still estimate delay in sometime. their effect of estimation is strongly affected by the real time delay

    理論分析表明，在非相關背景噪聲下lmstde演算法、 etde演算法和etdge演算法均有著良好的估計性能；在相關背景噪聲下，傳統的lmstde演算法無能為力，而etde演算法和etdge演算法依然具有時延估計的能力，但是它們的估計效果要受到時延真值的影響。
  18. A blind joint angle and delay estimation method based on trilinear alternating least square technique in uniform circular array ( tals - cjade ) is also presented in section 3, and a blind joint angle and delay estimation method based on complex parallel factor in uniform circular array ( comfac - cjade ) is given to improve the tals - cjade convergence performance

    傳統聯合角度和時延估計方法在過載情況下（用戶數大於陣元數）不能正確估計。與傳統聯合角度和時延估計方法相比， tals - ljade和tals - cjade演算法具有較好doa和時延的聯合估計性能，且在過載情況下仍有較好的性能。
  19. The blind synchronization method based on cyclostationarity is firstly analyzed in the downlink. simulations of the method are carried out under different channel conditions. the performances of the method are analyzed, and then compared with the blind method based on the cyclic prefix of ofdm symbols, thus the validity of the method is proved

    本文首先在下行鏈路中分析了基於ofdm信號的循環平穩特性的盲同步信息估計演算法，並在多種通道條件下進行了計算機模擬，對基於ofdm信號循環平穩特性的估計器的性能進行了分析，並與基於ofdm信號循環前綴的ml演算法的估計性能進行了比較，從而證明了提出演算法的有效性。
  20. Fortunately, ipsec provides us security services for ip layer and higher layers, such as access control, connectionless integrity, data origin authentication, rejection of replayed packets ( a form of partial sequence integrity ), confidentiality ( encryption ), limited traffic flow confidentiality, and so on. the thesis gives a type of network security architecture based on ipsec system, it includes the following contents : 1 analyzing the security problem in tcp / ip protocol stack, current main network attack methods and regular defense methods. 2 studing the overall architecture, main security protocols, application environments, and working mechanism of ipsec

    本文所提出的新一代網路安全體制就是建立在ipsec體系基礎上的，在本文的撰寫過程中，我主要進行了如下一些工作： 1深入分析了由tcp ip協議棧本身帶來的安全問題、當前主要的網路攻擊方法以及常採用的防範對策； 2研究了ipsec標準的總體結構、主要安全協議、應用場合以及其工作機制； 3研究了當前常用的各種數據加解密機制以及密碼演算法，深入分析了它們各自的特性和具體的使用方式； 4閱讀了大量關于混沌密碼的文獻資料，了解目前混沌密碼的研究動態和成果，研究混沌密碼體制的工作機理，然後利用vc + + 6 . 0作為開發平臺對一類混沌密碼體制進行了實現，並為它編寫測試代碼評估其性能。
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