寬頻帶內插 的英文怎麼說
中文拼音 [kuānbīndàinèichā]
寬頻帶內插
英文
broadband interpolation-
In order to increase processing rate of inserting filters, pipe line is used to satisfy if ( intermediate frequency ) modulation. 5. nco ( numeric controlling oscillator ) based on lab ( look - at table ) fully satisfy if modulation
研究了級聯內插濾波器在寬帶if調制中的應用;以及如何加流水線（ pipeline ）提高內插濾波器的處理速率，滿足高速中頻（ if ）調制要求。In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector
在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。For the 32 phase states, within the frequency band of 60mhz 10mhz, the insertion loss of the phase shifter is lower than 2. 3db, the imbalance of scope is lower than 0. 3db, the phase error is better than 3. 3 degree, the input / output vswr is lower than 1. 7. physical dimension is 40mmx30mmx20mm
實測結果表明:中頻寬帶五位數字移相器在60mhz 10mhz頻率范圍內， 32個相位狀態的插入損耗都低於2 . 3db ，幅度不平衡小於0 . 3db ，相位誤差小於3 . 3度，輸入和輸出電壓駐波比都小於1 . 7 。In the frequency - domain, by referencing of the result of software radio, adapting the process method of digital signals, e. g. interpolate and extraction, and using the matlab signal process box, the experiment of hybrid filter banks ( hfb ' s ) applied in dso is made with computer
在頻域，引用軟體無線電研究成果，應用抽取、內插等數字信號處理方法，用matlab信號處理工具箱完成對頻域帶通取樣變換方法應用於寬帶存儲數字示波器的模擬實驗。分享友人