本文给出能量有限带限信号外推问题新的解析解，它比长球波函数展开法更为简单。
This paper proposes a novel method to obtain a simple analytical solution to extrapolation problem for band-limited signals, which is much easier than prolate spherical wave function expansion method.
后面的FIR滤波器的设计中，为获得有限长单位取样响应，需要用窗函数截断无限长单位取样响应序列。
The back of the FIR filters design, to acquire limited long unit sampling response, need to use the window function truncation infinite long unit sampling response sequence.
后面的FIR滤波器的设计中，为获得有限长单位取样响应，需要用窗函数截断无限长单位取样响应序列。
The back of the FIR filters design, to acquire limited long unit sampling response, need to use the window function truncation infinite long unit sampling response sequence.
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