| 摘要 |
A device (115) for calibrating a direct conversion receiver (100; 200) or means for receiving signal from a direct conversion receiver comprises: a) means (301) for receiving an in-phase component (I) and an in-quadrature component (Q) from a direct conversion receiver (100; 200) and for converting them to at least one digital signal (DI, DQ); b) means (303) for generating a calibration signal (CS) responsive to the digital signal (DI, DQ); and c1) output means (303) for outputting said calibration signal (CS) to the direct conversion receiver (100; 200) for trimming an in-phase mixer (111), or an in-quadrature mixer (113); or c2) adjusting means (303), responsive to said calibration signal (CS), adapted: to calibrate the means (301) for receiving the in-phase component (I) or the in-quadrature component (Q) from the direct conversion receiver (100; 200); or to adjust digital compensation means (305) of the device (115), preferably by changing digital correction values (C I and C Q ; DI -> CI; DQ -> CQ).
|
