Multi-standard multi-rate filter
US9037625B2 · kind B2 · utility
4Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2012 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Jul 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0664
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method is provided for decimating a digital signal by a factor of M and matching it to a desired channel bandwidth. The method applies the digital signal input samples to a (M−1) stage tapped delay line, downsamples the input samples and the output samples of each tapped delay line stage by a factor of M, and applies each of the M downsampled sample value streams to M allpass IIR filters, respectively. The M allpass IIR filtered sample streams are then summed and scaled by a factor of 1/M. The result can then be filtered by a digital channel filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.