Analysis of linear interpolative standard error about meteorological element field in the southeast china 中国东南地区气象要素场线性内插标准误差初步分析
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The improved algorithm of optimal interpolative estimation was adopted under the condition of strong signal interrelation 在信号相关性强的情况下，采用了最优插值估计的改进算法。
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Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing , pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction . ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain . ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain 通过大量的理论分析和仿真实验，得到了一批具有一定价值的结论：从信号处理的角度出发，对于脉冲式干扰，能够运用时域滑动窗口积累的方法去掉，并且通过预测插值得到较好的恢复；对于高斯白噪声干扰，在时频变换域内应用时频分析方法可减小其对分散点目标的干扰；对于射频噪声，通过平均距离频频法和频域陷波的方法可以去掉；从改变合成孔径雷达系统角度出发，类似双基地雷达能够避免各种干扰，对发射信号进行调幅，调相以及改变调频斜率都是较好的抗干扰方法。
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In this paper , two novel algorithms of reconstructing high resolution images from both overlapped parallel projection data and overlapped fan beam projection data with low resolution are presented . one is called virtual detector algorithm , and the other is direct reconstruction algorithm . both of the algorithms with two forms for the parallel data and fan beam data respectively are developed based on the interpolative algebraic reconstruction techniques ( iart ) 本文在研究插值代数重建法( iart )的基础上，根据特别设计的数据采集模式(平行相叠采样和扇形相叠采样) ，提出了由相叠低分辨数据重建高分辨图像的两个新算法，即虚拟探测器法和直接重建法。
