Method for calculating causal impulse response from a band-limited spectrum
US8694568B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2011 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Sep 24, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0252
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method for calculating a time-domain impulse response with improved causality based on a first spectrum in a frequency domain is disclosed. The first spectrum may be band-limited. The method may calculate a first time-domain impulse response from the first spectrum. The method may remove a non-causal portion of the first system time-domain impulse response to obtain a second time-domain impulse response, and calculate a second spectrum of the second time-domain impulse response. The method may further modify the second spectrum by adding a causal signal such that a difference between the second spectrum and the first spectrum is reduced. The method may also calculate the time-domain impulse response with improved causality from the modified second spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.