RCS測量中的降采樣率方法
AN EFFECTIVE METHOD OF REDUCING SAMPLING RATE IN RCS MEASUREMENT
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摘要: 在進行外場RCS測量時,測量距離模糊窗口遠大于目標(biāo)區(qū)有效窗口;為此本文提出了一種測量數(shù)據(jù)減縮方法;該方法用一個相關(guān)本振信號對目標(biāo)區(qū)回波信號進行二次移頻處理,大幅度降低了信號載波頻率,從而有效地縮減了采樣頻率;壓縮了采集數(shù)據(jù)存儲量。
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關(guān)鍵詞:
- RCS測量; 掃頻測量; 采樣率減縮
Abstract: When performing RCS measurements for outdoor targets, usually the whole space range under measurement is greatly longer than the actual target zone, which causes very large data storage and makes further data processing difficulty. To solve this problem, an effective method is presented in this paper, which can largely reduce measurement data. In this method, a related local oscillation signal is generated to be mixed with the received signal, which can greatly decrease the carrier frequency of the return signal from targets. With this method, a much lower sampling rate is guaranteed, which can greatly reduce the data storage and signal processing time. -
Mensa D L. High Reslution radar imaging.610 Washington St., Dedham, MA: Artech House 1981,37-41.[2]李文德,王振榮,薛明華.微波成象中多采樣率信號預(yù)處理方法.電子科學(xué)學(xué)刊,1993, 15(4): 410-415.[3]薛明華,王振榮. 掃頻RCS測試系統(tǒng)原理及應(yīng)用.航空電子技術(shù).96年第4期(總第85期): 20-25. -
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