Calibrating an RF transmitter
First Claim
1. A method for calibrating a radio frequency (RF) transmitter, the method comprises:
- mixing a modulated RF signal generated by the RF transmitter with an in-phase (I) component of a local oscillation or a quadrature (Q) component of the local oscillation to produce a baseband representation of the modulated RF signal;
converting the baseband representation of the modulated RF signal into a digital baseband signal;
filtering the digital baseband signal to produce at least one frequency spectrum component;
interpreting the at least one frequency spectrum component to produce a calibration signal; and
calibrating at least one of DC offset and gain offset of digital transmitter processing module based on the calibration signal.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for calibrating a radio frequency (RF) transmitter begins by mixing a modulated RF signal with an in-phase (I) component of a local oscillation or a quadrature (Q) component of the local oscillation to produce a baseband representation of the modulated RF signal. The method continues by converting the baseband representation of the modulated RF signal into a digital baseband signal. The method continues by filtering the digital baseband signal to produce at least one frequency spectrum component. The method continues by interpreting the at least one frequency spectrum component to produce a calibration signal. The method continues by calibrating at least one of DC offset and gain offset of digital transmitter processing module based on the calibration signal.
38 Citations
10 Claims
-
1. A method for calibrating a radio frequency (RF) transmitter, the method comprises:
-
mixing a modulated RF signal generated by the RF transmitter with an in-phase (I) component of a local oscillation or a quadrature (Q) component of the local oscillation to produce a baseband representation of the modulated RF signal; converting the baseband representation of the modulated RF signal into a digital baseband signal; filtering the digital baseband signal to produce at least one frequency spectrum component; interpreting the at least one frequency spectrum component to produce a calibration signal; and calibrating at least one of DC offset and gain offset of digital transmitter processing module based on the calibration signal. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An apparatus for calibrating a radio frequency (RF) transmitter, the apparatus comprises:
-
processing module; and memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to; mix a modulated RF signal generated by the RF transmitter with an in-phase (I) component of a local oscillation or a quadrature (Q) component of the local oscillation to produce a baseband representation of the modulated RF signal; convert the baseband representation of the modulated RF signal into a digital baseband signal; filter the digital baseband signal to produce at least one frequency spectrum component; interpret the at least one frequency spectrum component to produce a calibration signal; and calibrate at least one of DC offset and gain offset of digital transmitter processing module based on the calibration signal. - View Dependent Claims (7, 8, 9, 10)
-
Specification