RS encoder in DVB-S and some classical decoding algorithms are introduced, then some Fast Fourier Transform (FFT) algorithms in finite domain are presented.
2
快速傅里叶变换是数字信号处理的常用数学工具，以运算速度快和信噪比阈值低为特点。
FFT is a mathematical tool commonly used in digital signal processing, and is characterized by fast operational speed and low SNR threshold value.
3
傅里叶变换是一种常用的数学工具，在数学、物理及工程技术领域都得到了十分广泛的应用。
As a usually math tool, Fourier transform is using in math, physical and engineering field widely.
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