机载双通道SAR/DPCA误差分析
doi: 10.3724/SP.J.1146.2005.00673
Error Analysis for Airborne Dual-Channel SAR/DPCA System
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摘要: SAR/DPCA技术是一种简单实用的多通道SAR运动目标检测方法，实际应用中会受到各种误差因素的限制，其中影响算法性能最大的两类误差是载机速度误差和通道失衡。该文详细地分析了这两类误差因素对SAR/DPCA算法性能的影响，建立了误差分析模型，针对实际参数给出了误差分析的结果，并确定了一定误差条件下的系统可检测速度范围、盲速和最小可检测速度。Abstract: SAR/DPCA(Displaced Phase Center Antenna) technique is a simple and practical method of multi-channel SAR/GMTI(Graund Moving Target Indication), but in practice it is limited by some kinds of errors, in which antenna phase center velocity error and channel mismatch are the most important errors. In this paper, the error analysis model is founded and the loss of moving target detection performance is analyzed under the circumstance of antenna phase center velocity error or channel mismatch. The error analysis results are shown on the figures and the range of detectable velocity, blind velocity and minimum detectable velocity are confirmed on the basis of actual parameters of dual-channel SAR/DPCA system.
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