中国电子商情:通信市场
中國電子商情:通信市場
중국전자상정:통신시장
2011年
6期
269-274
,共6页
转台成像%定标%相位误差修正%最小二乘估计
轉檯成像%定標%相位誤差脩正%最小二乘估計
전태성상%정표%상위오차수정%최소이승고계
turntable imaging%calibration%phase error correction%Least Square (LS)
在转台目标雷达成像中,受转台架设条件所限,定标球中心难以与转台中心严格对准,使得利用定标球对目标进行定标成像时出现散焦。本文从理论上分析了定标球偏心对定标后目标成像数据相位的影响,推导了定标球相位与其偏心位置的关系,基于最小二乘方法估计了定标球偏心位置参数,修正了偏心球定标引入的目标成像相位误差。仿真和实测数据结果表明,该方法可以正确估计定标球偏心位置参数并修正定标引入的相位误差,从而改善了目标成像效果。
在轉檯目標雷達成像中,受轉檯架設條件所限,定標毬中心難以與轉檯中心嚴格對準,使得利用定標毬對目標進行定標成像時齣現散焦。本文從理論上分析瞭定標毬偏心對定標後目標成像數據相位的影響,推導瞭定標毬相位與其偏心位置的關繫,基于最小二乘方法估計瞭定標毬偏心位置參數,脩正瞭偏心毬定標引入的目標成像相位誤差。倣真和實測數據結果錶明,該方法可以正確估計定標毬偏心位置參數併脩正定標引入的相位誤差,從而改善瞭目標成像效果。
재전태목표뢰체성상중,수전태가설조건소한,정표구중심난이여전태중심엄격대준,사득이용정표구대목표진행정표성상시출현산초。본문종이론상분석료정표구편심대정표후목표성상수거상위적영향,추도료정표구상위여기편심위치적관계,기우최소이승방법고계료정표구편심위치삼수,수정료편심구정표인입적목표성상상위오차。방진화실측수거결과표명,해방법가이정학고계정표구편심위치삼수병수정정표인입적상위오차,종이개선료목표성상효과。
In the turntable target radar imaging, because of the actual limitations of the rotary table, it is difficult to make the calibration ball's center strictly aligned with the rotary table's center. It would result in diffusion of focus in azimuth orientation in the target imaging when our take this inaccurate calibration ball data to calibrate the target imaging data. Firstly, this paper analyses the influence of the inaccurate calibration ball data to the phase of target imaging data calibrated. Secondly, based on the theoretical derivation analysis, the Least Square (LS) parameter estimate method is used to estimate the parameters of the calibration ball actual location. Finally, it corrects this phase error. Simulation and measurements results show that this method can correctly estimate the calibration parameters and correct the introduced calibration ball eccentric position phase error to improve the target imaging.