prefix method 中文意思是什麼

prefix method 解釋
前綴法, 詞頭法
  • prefix : n 1 【語法】前綴，詞首；前加成分〈如 prefix 的 pre 〉。2 人名前用的尊稱 〈Mr Dr Sir 等〉。3 【數...
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. In this paper, the radiolocation technique and principium of ofdm in the cell - communication system were introduced firstly, and sensitivity of ofdm system to synchronization was analyzed. then, two methods of timing synchronization based on the cyclic prefix and pilot sequence were introduced, and a novel timing synchronization method based on pilot sequence was presented, which provided a correlation peak with pulse shape

    由於ofdm系統中的定時同步要求和無線定位中的測時測距在本質上是一致的，所以本文緊接著分析了基於循環前綴和導頻序列的兩種定時同步方法，並提出了一種新的基於導頻序列的具有脈沖形狀相關峰的定時同步方法。
  2. This method looks up the prefix that is in scope for the given namespace

    此方法查找位於給定命名空間范圍內的前綴。
  3. According to wireless and mobile communication system ' s background, this thesis study on estimation of time - varying dispersive channel from four respects : ( 1 ) aid of pilots, ( 2 ) cyclic prefix ( cp ), ( 3 ) blind method, and ( 4 ) ofdm system with multiple transmitting antenna, in which the typical ways is decision - feedback algorithm and self - adaptive block algorithm

    本文以無線和移動通信系統為背景，從四個方面對時變色散通道下的ofdm系統的通道估計和均衡問題進行了研究。第一是基於導頻符號的通道估計方法，第二是基於循環前綴的通道估計方法，第三是通道的盲估計方法，第四是基於多天線ofdm系統的通道估計和均衡方法的研究。
  4. Secondly, the dissertation proposes a novel blind symbol - timing scheme for ofdm systems based on cyclostationarity feature of received symbols. the proposed schemes also exploits the periodicity of ofdm symbol introduced by cyclic prefix, by applying 2 - dimentional fourier transformation and choosing the appropriate correlation peak value as the symbol start location, the precision of this scheme is higher than previous conventional method. thirdly, the dissertation presents analysis with regard to channel estimation of ofdm systems. several interpolation algorithm in ofdm systems which based on pilot sequence have been analyzed in the first instance, and the influence of the channel noise on interpolation precision has discussed. the theoretic analysis and simulation results show that : the interpolation error induced by the precision of interpolation procedure itself has out weight

    第三，論文在ofdm系統的通道估計方面，先對基於導頻的ofdm通道估計中的多種插值方法進行了分析，討論了噪聲對插值精度的影響，指出插值本身的精度所造成的插值誤差遠大於噪聲所帶來的插值誤差，從而階次更高的插值演算法在實用中並非最優的;並指出插值濾波法比變采樣率演算法對噪聲的影響更為敏感，在信噪比較高時插值濾波演算法比變采樣率演算法更優。
  5. 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。
  6. 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。
  7. Prefix when invoking interface methods on value types, since the value type method implementing the interface method can be changed using a

    前綴，因為實現介面方法的值類型方法可以用
  8. Prefix instruction to specify that the current method state should be released before transferring control

    指令之前，以指定轉移控制之前應釋放當前方法狀態。
  9. With qpsk modulation method employed in our ofdm system, there are several important parameters relating to bandwidth efficiency should be consider carefully. they are the number of subcarrier, the length of cycle prefix and the parameters of pulse shaping filer

    結合qpsk調制，文中討論了建立這樣一個高帶寬效率的ofdm傳輸系統所需要著重考慮的幾個參數：子載波數目、循環前綴長度和成形濾波器的參數。
  10. According to the characteristics of customer ' s transaction database, a novel customer temporal sequence association rules mining method was proposed which was based on prefix projected accumulation tree

    摘要針對客戶交易數據的特點，提出了一種基於前綴映射累加樹的客戶時序關聯規則發現方法。
分享友人
分享到 Line

分享到臉書