Method for processing sampled data signals
US5485395A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R13/0272
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic system for processing sampled data signals to determine the frequency spectra of the signals comprises windowing the sampled signal to a length of an MN data point series. The series of data points is divided into M contiguous blocks numbered from 0 to M-1, each block containing N data points numbered from 0 to N-1. Each block is then added into a memory having N registers numbered from 0 to N-1, the value of the data point in each block being added into the value in the correspondingly numbered register such that each numbered register contains the sum of correspondingly numbered data points in the blocks, and such that the memory comprises a time-aliased series of N data points. The time-aliased series is then Fourier transformed, yielding a spectra with leakage consistent with a window of length MN at the spectral lines of the N-point transform. A smoothed sinc windowing function for leakage to adjacent spectral lines is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.