The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2014
Filed:
Dec. 18, 2008
Per Åhgren, Knivsta, SE;
Per Åhgren, Knivsta, SE;
Telefonaktiebolaget LM Ericsson (Publ), Stockholm, SE;
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(ω) based on a first correction value g(0) and a desired frequency response H(ω); forming a first filter(z) from the first corrected frequency response(ω); applying the first filter(z) to a first block of the input signal to produce a first output signal block; computing an amplificationcaused by the application of the filter(z); computing a value γ, wherein γrepresents an amplification error; computing a second correction value g(1), where g(1) is a function of g(0) and γ; forming a second corrected frequency response(ω) based on the second correction value g(1) and the desired frequency response H(ω); forming a second filter(z) from the second corrected frequency response(ω); and applying the second filter(z) to a second block of the input signal to produce a second output signal block.