Method and system for characterizing phase dispersion in intermediate frequency channel of receiver
US9520954B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2016 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Jan 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/0085
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method supply a test signal having a first tone at a first RF frequency and a second tone at a second RF frequency to a frequency converter; provide a local oscillator (LO) signal to the frequency converter, wherein an IF output signal of the frequency converter is supplied to an input of an intermediate frequency (IF) filter, in response to which the IF filter provides a filtered IF output signal; for each of N>1 different LO frequencies, measure the filtered IF output signal at a pair of IF frequencies corresponding to differences between the first and second RF frequencies and the LO frequency, where the measurements of the filtered IF output signal measure time-invariant phase; and ascertain N−1 values of phase dispersion D of the IF filter at N−1 corresponding IF frequencies from the N measurements of the filtered IF output signal at the N different LO frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.