Title:
適応ディジタルフィルタ、信号処理方法、FM受信機およびプログラム
Document Type and Number:
Japanese Patent JP5029356
Kind Code:
B2
Abstract:
A complex signal in which one of two signals that are generated from one real signal and that have phases shifted from each other by 90° 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 this input signal and filter coefficients that are real signals and supplies the result to an output terminal (302). A coefficient control unit composed of a common unit (318) and separate units (319 0 -319 N-1 ) controls the envelope target value based on the input signal and updates the filter coefficients such that the value of the envelope derived from the output signal approaches the envelope target value.
Inventors:
Hoshuyama Osamu
Application Number:
JP2007525927A
Publication Date:
September 19, 2012
Filing Date:
June 30, 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