研究了基于DFT变换的变换域窄带干扰抑制技术，分析了加窗引入的信噪比损失。
The technique of NBI suppression based on the DFT transform domain is studied, the loss of SNR produced by adding window to input datum is analyzed.
借助于型参数，通过变换动量积分方程，得出动量损失厚度近似解的表达式。
By type factors and transitional momentum integral equation, the approximate expression of momentum thickness is presented as well.
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