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    • 1. 发明申请
    • Multirate filter as well as display system and mobile telephone comprising said multirate filter
    • 多速率滤波器以及包括所述多速率滤波器的显示系统和移动电话
    • US20060056553A1
    • 2006-03-16
    • US10537066
    • 2003-12-04
    • Alphons Antonius BruekersAntoninus Adrianus Kalker
    • Alphons Antonius BruekersAntoninus Adrianus Kalker
    • H04B1/10
    • H03H17/0275H03H17/0276H03H17/0685
    • A multirate filter according to the invention comprises, a) an input unit (10) for receiving an input signal (Sin) and for providing a plurality of intermediate signals (IS1, IS2) in response to said input signal, b) a filter unit (20) coupled to the input unit (10), and c) an output unit (30) coupled to the filter unit (20), for generating an output signal (Sout). The filter unit (20) comprises at least a first and a second filter module (21, 22), with a transfer function H0(z) and a transfer function H1(z) respectively, which are mutually related according to the relations H0(z)=c0(HB(z)+Mα,ψHB(z)) and, H1(z)=c1(HB(z)+Mα,ψHB(z)) wherein, Mα,ψ(HB(z))=αz−2ψHB*(z−1), and wherein Formula (I), being the z-transform of hb[m]. The multirate filter comprises a combination unit (11) coupled to said filter modules (21, 22) for generating a first combination signal (Ssum) and a second combination signal (Sdiff).
    • 根据本发明的多速率滤波器包括:a)用于接收输入信号(Sin)并响应于所述输入信号提供多个中间信号(IS 1,IS 2)的输入单元(10),b)a 滤波器单元(20),其耦合到所述输入单元(10),以及c)耦合到所述滤波器单元(20)的输出单元(30),用于产生输出信号(Sout)。 滤波器单元(20)至少包括具有传递函数H 0(z)和传递函数H 1(1)的至少第一和第二滤波器模块(21,22) (z)+(z)+(z)+(z)+(z))相互相关, (z))和H 1(z)= c 1(H(Z)) (z)+ Mα(ψ)B(Z))其中,Mα,ψ(ζ) H z(z))= alphaz 2psi H B *(z-1〜1),其中式 (I),作为h [m]的z变换。 多速率滤波器包括耦合到所述滤波器模块(21,22)的组合单元(11),用于产生第一组合信号(Ssum)和第二组合信号(Sdiff)。