Method and system for calibrating frequencies-amplitude and phase mismatch in a receiver
US7783273B2 · kind B2 · utility
13Cited by
7References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 6, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Apr 25, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/009
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The receiver, which enables rejection of image signals with higher accuracy over wider frequency band, can be provided as a low IF receiver by inputting a calibration signal of frequency fi (1≦i≦N) before reception of signals and determining the frequency response fa(z) to fd(z) of a calibrating filter in a filter mismatch calibrating circuit (FIL_CAL) 195 to make zero amplitude and phase mismatches between the I component and Q component of the quadrature demodulation signal at the frequency fIFi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.