Title:
信号をフィルタリングするシステム及び方法
Document Type and Number:
Japanese Patent JP5531024
Kind Code:
B2
Abstract:
Methods for filtering an input signal x(k) to produce an output signal y(k) such that the ratio of a power level of the output signal to a power level of the input signal is substantially equal to a desired value γ are provided. The methods include forming a first corrected frequency response H(ω) based on a first correction value gcorr(0) and a desired frequency response H(ω); forming a first filter h(z) from the first corrected frequency response H(ω); applying the first filter h(z) to a first block of the input signal to produce a first output signal block; computing an amplification γ caused by the application of the filter h(z); computing a value γdiff, wherein γdiff represents an amplification error; computing a second correction value gcorr(1), where gcorr(1) is a function of gcorr(0) and γdiff; forming a second corrected frequency response H(ω) based on the second correction value gcorr(1) and the desired frequency response H(ω); forming a second filter h(z) from the second corrected frequency response H(ω); and applying the second filter h(z) to a second block of the input signal to produce a second output signal block.
More Like This:
| JP2592810 | [Title of Invention] Sample rate conversion circuit |
| JP3300087 | ADAPTIVE NONCYCLICAL DIGITAL FILTER |
| JPS62284530 | HANDS-FREE TELEPHONE SET |
Inventors:
Ogren, Pell
Application Number:
JP2011542041A
Publication Date:
June 25, 2014
Filing Date:
December 18, 2008
Export Citation:
Assignee:
Telefon Akti Bora Get Elm Ericson (Pubble)
International Classes:
H03H17/06; H03H17/02
Domestic Patent References:
| JP2008011376A | ||||
| JP3058510A | ||||
| JP64061178A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama