Patent · US Active

Signal processing for a cable locating instrument

US10338263B2 · kind B2 · utility

0Cited by
4References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 6, 2015
Grant dateJul 2, 2019
Priority date—
Expiry dateFeb 17, 2036

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01V3/17
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

In accordance with some embodiments, a method and apparatus for providing both a low-pass filter value and a high-pass filter value is presented. The combined filter receives an input value into a half-band finite impulse response (FIR) filter with an odd number of taps labeled 0 through N with corresponding filter coefficients labeled 0 through N where odd numbered filter coefficients are zero, the FIR filter providing a filter value. The median value from the FIR filter is digitally shifted to provide a half median value. The half median value is added to the filter value to provide the low-pass filter value and is subtracted from the filter value to provide the high-pass filter value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.