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1. 发明授权

US06279019B1 Decimation filtering apparatus and method 有权
标题翻译：抽取滤波装置及方法
公开(公告)号：US06279019B1
公开(公告)日：2001-08-21
申请号：US09224811
申请日：1998-12-31
申请人： Hyuk-Jun Oh , Yong-Hoon Lee , Sun-Bin Kim , Gin-Kyu Choi
发明人： Hyuk-Jun Oh , Yong-Hoon Lee , Sun-Bin Kim , Gin-Kyu Choi
IPC分类号： G06F1710
CPC分类号： H03H17/0671
摘要： A decimation filtering apparatus using interpolated second order polynomials compensates for a droop caused by a CIC (Cascaded Integrator-Comb) filter. The decimation filter includes a CIC decimation filter for decimation filtering the sampling signal to downconvert a sampling signal; an ISOP filter for monotonically increasing an output of the CIC decimation filter to compensate for a passband droop caused by the CIC decimation filter; a multistage halfband filter including at least one modified halfband filter for half-decimating a signal output from the ISOP filter, thereby downconverting the ISOP filter output signal; and a programmable FIR filter that compensates for a passband droop of a signal output from the multistage halfband filter.
摘要翻译：使用内插二阶多项式的抽取滤波装置补偿由CIC（级联积分器 - 梳状）滤波器引起的下降。抽取滤波器包括用于抽样滤波采样信号以对采样信号进行下变频的CIC抽取滤波器; 用于单调地增加CIC抽取滤波器的输出以补偿由CIC抽取滤波器引起的通带下降的ISOP滤波器; 多级半带滤波器，包括至少一个修改的半带滤波器，用于对从ISOP滤波器输出的信号进行半抽取，从而下变频ISOP滤波器输出信号; 以及可编程FIR滤波器，其补偿从多级半带滤波器输出的信号的通带下降。

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