Title:
適応ディジタルフィルタ、FM受信機、信号処理方法、およびプログラム
Document Type and Number:
Japanese Patent JP5029355
Kind Code:
B2
Abstract:
A complex signal in which one of two signals that have been generated from a single real signal and that have phases that are shifted 90° with respect to each other is a real part and the other signal is an imaginary part is applied as input to an input terminal (301). A filter unit generates an output signal that is a complex signal by means of a convolution operation of the input signal, and a filter coefficient that is a real signal and supplies this output signal to an output terminal (302). A coefficient control unit made up from a common unit (318) and separate units (319 0 -319 N-1 ) updates the filter coefficients such that the value of the envelope of the output signal approaches a target signal.
Inventors:
Hoshuyama Osamu
Application Number:
JP2007525909A
Publication Date:
September 19, 2012
Filing Date:
June 02, 2006
Export Citation:
Assignee:
NEC
International Classes:
H03H21/00; H03H17/02; H04B1/10; H04B3/06; H04B7/005
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Ishibashi Masayuki
Masaaki Ogata