恆虛警率 的英文怎麼說
中文拼音 [héngxūjǐnglǜ]
恆虛警率
英文
constant false alarm rate-
First, we propose a kind of constant false alarm rate ( cfar ) target detector to find potential targets from scenario
利用恆定虛警率（ cfar ）檢測運算元，從場景中發現潛在目標。In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition
本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼，並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬，分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下，可以獲得較短的捕獲時間和較大的捕獲概率。With the conditions of constant false - alarm probability and low signal - to - noise ratio, the signal - to - noise ratio can be improved by reducing the effects of background interference and random noise
在恆虛警概率條件下，該演算法可以在低信噪比的情況下，減小背景干擾和隨機噪聲的影響，提高信噪比。A new conclusion in ca - cfar detection
單元平均恆虛警率檢測中的一個新結論Cfar target detection in sar imagery
合成孔徑雷達圖像的恆虛警率目標檢測Secondly, we systematically study the cfar target detection algorithm with the guide of the conclusion gained from the research of the clutter statistical models
其次，在研究雜波統計模型得到的結論的指導下，系統研究了恆虛警率（ cfar ）目標檢測演算法。( 3 ) cfar method : according to earth clutter ' s character, i adopt cell average constant false alert rate ( ca - cfar ) and biparameter cfar under the consideration of sea clutter character
（ 3 ） cfar方法：針對地雜波的特點，採用了單元平均恆虛警率（ ca ? cfar ）的方法。針對海雜波的特點，採用了雙參數cfar演算法。It can construct a reference path with lowest danger for the uav ( unmanned aerial vehicle ) by accounting for some aircraft performance characteristics, the mission goals, the threat information and the terrain information. this paper puts emphasis on the study of path planning algorithms and the analysis of uav missions. the main contributions are summarized as follows : ( 1 ) the threat environment, mainly as the radar threat, is studied and the detection probability of the aircraft is analyzed
本論文主要根據無人機的作戰任務方式進行了航路規劃研究，包括攻擊航路和偵察監視任務航路，具體內容包括以下幾個方面： （ 1 ）本論文分析了威脅空間的威脅計算問題，對飛行器探測概率進行定量化的研究，根據恆虛警處理技術對雷達探測概率計算方法進行了總結，說明了計算單部雷達探測概率問題的方法，在此基礎上對雷達網的探測概率計算進行了討論，提出了相對于距離的探測概率求解方法和思路，用於攻擊航路規劃中的威脅計算。It combines the real echoes with the date simulated using the real airborne sar system parameters to analyze and validate the method. after the combined data are filtered, the improved greatest of cell - average constant - false - alarm - rate ( go - ca - cfar ) is used to judge whether moving target is detected or not. in the following, real moving target is detected and its velocity and position is gained through which it is focused well
將接收的實際場景數據與實際系統參數下模擬的典型數據相結合，分析、驗證了頻域濾波法的性能，並對濾波后的數據採用改進的選大單元平均恆虛警率（ go - ca - cfar ）方法進行處理，判斷動目標是否存在；然後對實際的動目標進行檢測，準確的估計出目標速度及位置並對目標重新聚焦成像，接下來將聚焦的動目標圖像和常規sar圖像迭加，同時得到了回到真實位置的動目標聚焦圖像和實際場景sar圖像。Both ratio of average ( roa ) and cross - correlation method use local statistics to judge road. they perform good detection while smoothing speckle. moreover, they both have constant false alarm rate ( cfar ) which is important in radar target detecting
本文所採用的均值比例運算元和互相關運算元利用圖像局部的統計信息進行判決，在檢測道路基元的同時對圖像進行局部平滑以降低相干斑干擾;並且兩個運算元都具有恆虛警特性，門限值由給定的虛警概率確定。Based on the statistics characteristic of prc - phase - modulation cw phase - array guidance radar, this thesis discusses the signal processing method and cfar algorithm of multiple repetition frequency pseudo - noise m - sequence phase coded signal
本文結合偽碼調相連續波信號體制的特點，深入研究了多參差重復頻率偽隨機m序列相位編碼信號的處理方法和恆虛警檢測演算法。分享友人