FIR滤波器幅频特性图像C#的实现！

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可实现滤波器阶数的选择-This module provides functions to implement Finite Impulse

Response (FIR)

* filters using a variety of algorithms.

*

* These functions use most or all of the following input

parameters:

*

* input- the input sample data

* ntaps- the number of taps in the filter

* h[]- the FIR coefficient array

* z[]- the FIR delay line array

**p_state- the "state" of the filter　initialize this

to 0 before

* the first call

*

* The functions fir_basic, fir_shuffle, and fir_circular are

not very

* efficient in C, and are provided here mainly to illustrate

FIR

* algorithmic concepts. However, the functions fir_split,

fir_double_z

* and fir_double_h are all fairly efficient ways to

implement FIR filters

* in C