directional pattern 中文意思是什麼
directional pattern
解釋
定向模式- directional : adj. 1. 方向的。2. 【無線電】指向的，定向的。
- pattern : n 1 模範，榜樣；典範。2 型，模型；模式；雛型；【冶金】原型。3 花樣；式樣；（服裝裁剪的）紙樣；圖...
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Smart antenna has been widely researched in communication and signal processing, the adaptive beamforming algorithm is the key technique of smart antenna. it could adaptively steer the array directional pattern to form the main narrow beams with high gain in the direction of the users " signals while deeply nulling the interference signals. it is an effective way to realize the optimal receiving of the interesting signals
智能天線技術是目前通信和信號處理等領域的研究熱點，自適應波束形成演算法的研究是智能天線的一個關鍵技術，它能夠自適應地控制天線陣方向圖在用戶信號方向產生高增益窄波束，在干擾信號方向產生較深的零陷，是實現用戶信號最佳接收的有效方法。 -
The paper includes four sections followed here : the first section studies the modeling of signals of pulse doppler radar seeker, and establishes a radar signal simulation model, including radar emitting signal model, receiving signal model, receiving echo signal model, clutter model, noise model, sum channel directional pattern of antenna model, difference channel directional pattern of antenna model, sheltering model, rcs model, glint noise model, etc. the second section studies signal processing of pulse doppler radar seeker, and establishes radar signal processing mathematical model and data processing mathematical model for simulation, including windowing, doppler filtering, envelope demodulation, pdi, cfar, centering, velocity tracking, angle tracking, a - b filtering, etc. the third section studies the modeling of modified proportion guiding, and establishes guiding model, then dynamic simulation results is provided
論文的主要工作包括四部分：第一部分研究了脈沖多普勒雷達導引頭的信號建模問題，建立了雷達信號模型，主要包括：發射信號模型、接收信號模型、目標回波信號模型、雜波模型、噪聲模型、和差通道天線方向圖模型、遮擋因子模型、接收機噪聲模型、目標雷達截面積統計性模型、目標角閃爍模型等。第二部分研究了脈沖多普勒雷達導引頭的信號處理模式，建立了信號和數據處理模型，主要包括：加窗和多普勒濾波、包絡檢波、檢波后積累、頻域cfar處理、速度定心、速度跟蹤、角跟蹤、 ?濾波等，然後給出了信號處理流程。 -
2. study the working principle of the vector transducer, mainly for two - dimensional pressure - gradient transducer. and the experimental results for directional pattern of two - dimensional pressure - gradient vector transducer at frequency 3khz and 5khz are given
重點對本文所要研究的壓差式矢量水聽器進行研究，並運用消聲水池實測數據繪出了二維壓差式矢量水聽器在3khz和5khz下的指向性圖。 -
Radiation pressure and directional pattern of flexural vibrating air - borne ultrasonic transducer
氣介式彎曲振動換能器的輻射聲壓及其指向特性 -
Form an all - directional, multi - layered and wide - ranging opening pattern
形成全方位多層次寬領域的開放格局 -
Measurement of directional response pattern
指向性響應圖案測量 -
Directional pattern of microphone
傳聲器指向性圖案 -
The three - dimension dbf of circular array and cylinder array are presented. we adopt equivalent with uniformity linear array ( ula ) in cylinder beam forming, and compare pattern of directional elements with of omni - directional elements
在圓柱陣的波束形成模擬中，採用了等效均勻線陣的方法，簡化了數字波束形成的計算量，並且還對有向陣元和全向陣元在陣列波束形成中的影響進行了模擬比較。 -
Multi - directional outsole tread pattern
多方向靴外底花紋 -
In addition, based on the second order hilbert curve, some modifications have been done. with different kinds of substrates, the pattern - reconfigurable antennas and the broadband directional antennas are designed
第四部分，針對hilbert二階分形曲線並做一定的改進，利用不同的介質材料，設計出方向圖可重構平面天線以及寬帶的定向天線，完成了部分原理性實驗。
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