Method for collecting signal with sampling frequency lower than Nyquist frequency
US9455741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2015 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Jul 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2642
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for collecting a signal with a frequency lower than a Nyquist frequency includes, by a data transmitting end, selecting a suitable transformation base matrix for an input signal, deriving a sparse representation of the signal using the transformation base matrix to determine a sparsity of the signal, calculating a number M of compressive sampling operations according to the sparsity, sampling the signal with fNYQ/M using M channels, and integrating sampling values of each channel to obtain M measurement values. A reconstruction end reconstructs an original signal by solving optimization problems. Based on theory, compressive sampling can be performed on a sparse signal or a signal represented in a sparse manner with a frequency much lower than the Nyquist frequency, overcoming restrictions of the typical Nyquist sampling theorem. The method can be implemented simply and decrease pressure on data collection, storage, transmission and processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.