隨機迭代器 的英文怎麼說
中文拼音 [suíjīdiědàiqì]
隨機迭代器
英文
random iterator- 隨 : Ⅰ動詞1 （跟; 跟隨） follow 2 （順從） comply with; adapt to 3 （任憑; 由著） let （sb do as he li...
- 機 : machineengine
- 迭 : Ⅰ動詞（輪流; 替換） alternate; change Ⅱ副詞1 （屢次） repeatedly; again and again 2 （及） in tim...
- 代 : Ⅰ動詞1 （代替） take the place of; be in place of 2 （代理） act on behalf of; acting Ⅱ名詞1 （歷...
- 器 : 名詞1. （器具） implement; utensil; ware 2. （器官） organ 3. （度量; 才能） capacity; talent 4. （姓氏） a surname
- 隨機 : random stochasticrandom
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The research for key techniques of turbo codes is processed. it includes, ? the design of optimal component codes and the performance of asymmetric turbo codes are analyzed ; ? a search algorithm for short random interleaver based on the distance spectrum and ids criteria is carried out and simplified ; ? random puncturing method to improve the weight distribution of turbo codes with some special code rates is analyzed and simulated. ? the effect of different schemes of trellis termination to the performance of turbo codes is analyzed ; ? a new low complexity decoder structure is provided ; 5
對turbo碼的部分關鍵問題進行分析和改進，主要包括： ?分析了最優分量碼的設計和非對稱turbo碼的性能； ?設計了基於距離譜和ids的短隨機交織器搜索演算法並進行了簡化； ?提出了採用隨機刪余方式改善特定高碼率turbo碼重量分佈特性的方法； ?分析了不同編碼器狀態歸零方案對turbo碼性能的影響； ?提出了一種降低實現復雜性的turbo迭代譯碼器結構。Turbo codes were presented by c. berrou in international conference on communications in 1993. they hang convolutional code and random interleaver together to realize the idea of random coding, and adopt soft input / soft output ( siso ) iterated decoding to approach maximum likelihood decoding ( mld ). turbo codes come closer to approaching shannon ' s limit
Turbo碼，由c . berrou等在icc 』 93會議上提出，它巧妙地將卷積碼和隨機交織器結合在一起，實現了隨機編碼的思想，同時，採用軟輸入軟輸出迭代譯碼來逼近最大似然譯碼，具有近shannon限的性能。Such code is also called gradually good code or shannon code. in 1993, c. berro etc. firstly proposed a new channel code method - turbo code, which employed recursive systematic code 、 the random interleaver 、 map ( maximum a posteriori ) algorithm and iterative decoding algorithm obtained the capacity that had only 0. 7db difference compared to the shannon limitation
1993年c . berro等首先提出了一種全新的通道編碼方式? turbo碼，採用遞歸系統碼與隨機交織器構造turbo碼，並將map （ maximumaposteriori ）演算法和迭代演算法應用於解碼過程，獲得了與香農理論極限僅差0 . 7db的性能。A llmmse filter is designed to reduce noise based on the noise model to improve snr of images. making use of the shape and lightness characters of feature points to detect the feature p oints from images. because the accuracy of feature imaging point ' s centroid has close relationship with measuring accuracy, an algorithm based on iteration of the center of the track window is used to improve the measurement accuracy
圍繞著提高測量精度的要求，分析了影響ccd圖像質量的三類隨機噪聲，建立局部統計特性為高斯分佈的簡化圖像噪聲模型，利用線性最小均方誤差濾波器對圖像進行預處理，而後根據特徵點的亮度和形狀特徵對特徵像點進行檢測，進一步在特徵像點的匹配中採用自適應的質心迭代演算法提高跟蹤精度。分享友人