Synchronizing receivers in a signal acquisition system
US8798207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2012 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Mar 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0029
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for synchronizing a plurality of receivers. A tone from a signal generator is swept over a frequency band. A power splitter splits the tone into a plurality of resultant tones that are supplied to the respective receivers. For each receiver, a relative frequency response (including amplitude and phase responses) is measured between the receiver and a master receiver. A linear approximation to the phase response is computed. A digital filter is custom designed for the receiver to compensate for non-uniformity of the amplitude response and for deviations of the phase from the linear approximation. After applying the digital filter, further adjustments are made to remove the time delay corresponding to the linear approximation, e.g., by appropriately configuring a fractional resampler, by adjusting a numerically-controlled oscillator, and/or, by adjusting sample clock phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.