Invention Grant
US08223829B2 Adaptive digital filter, signal processing method, FM receiver, and program
有权
自适应数字滤波器，信号处理方法，FM接收机和程序
- Patent Title: Adaptive digital filter, signal processing method, FM receiver, and program
- Patent Title (中): 自适应数字滤波器，信号处理方法，FM接收机和程序
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Application No.: US11988550Application Date: 2006-07-14
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Publication No.: US08223829B2Publication Date: 2012-07-17
- Inventor: Osamu Hoshuyama
- Applicant: Osamu Hoshuyama
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2005-206721 20050715
- International Application: PCT/JP2006/314051 WO 20060714
- International Announcement: WO2007/010849 WO 20070125
- Main IPC: H03H7/30
- IPC: H03H7/30 ; H03H7/40 ; H03K5/159
Abstract:
An adaptive digital filter is provided with a filter unit for generating and supplying an output signal by means of a convolution operation of an input signal and a filter coefficient, or a filter unit for taking as input signal a complex signal in which one of two signals that are generated from one real signal and that have phases that differ by 90° is a real part and the other signal is an imaginary part for generating and supplying an output signal that is a complex signal by means of a convolution operation of the input signal and a filter coefficient that is the real signal; and the update amount of the filter coefficient is controlled based on the estimated value of the amplitude of at least one of the input signal and output signal of the adaptive digital filter.
Public/Granted literature
- US20090122931A1 Adaptive Digital Filter, Signal Processing Method, FM Receiver, and Program Public/Granted day:2009-05-14
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