Systems and methods for filtering a signal
US8688758B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jan 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0294
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.