| 摘要 |
A radio includes a self-calibrating transmitter that uses a portion of a receiver section to perform self-calibration. Accordingly, the radio includes a transmitter section, mixer, analog receiver section, calibration switch module, digital receiver section, calibration determination module, and calibration execution module. The transmitter section produces a modulated RF signal from base-band signal and a transmitter local oscillation. The mixer mixes the modulated RF signal with the transmitter local oscillation to produce a base-band representation of the modulated RF signal. In calibration mode, the calibration switch module provides the base-band representation to the receiver section, which processes the representation to produce a 2<nd >base-band digital signal. The calibration determination module interprets frequency components of the 2<nd >base-band digital signal to produce a calibration signal that compensates for imbalances within the transmitter.
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