Raised-cosine filter

（重定向自Raised cosine）

Impulse response of raised-cosine filter with various roll-off factors

Consecutive raised-cosine impulses, demonstrating zero-ISI property

The raised-cosine filter is a filter frequently used for pulse-shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non-zero portion of the frequency spectrum of its simplest form ( $\beta = 1$ ) is a cosine function, 'raised' up to sit above the $f$ (horizontal) axis.

单词	Raised cosine
释义	Raised cosine 英语百科 Raised-cosine filter （重定向自Raised cosine） The raised-cosine filter is a filter frequently used for pulse-shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non-zero portion of the frequency spectrum of its simplest form ( $\beta = 1$ ) is a cosine function, 'raised' up to sit above the $f$ (horizontal) axis.
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