A Hybrid Scheme for TX I/Q Imbalance Self-Calibration in a Direct-Conversion Transceiver
Ruhao Wang,
Peng Gao,
Jiarui Liu
et al.
Abstract:A generic transmitter (TX) I/Q imbalance self-calibration method, which was designed based on a hybrid analog and digital structure, is proposed in this paper. The whole calibration scheme was implemented using low-complexity digital–analog circuits based on a zero-force feedback loop. In order to eliminate the negative effect of local oscillator (LO) harmonics on the calibration, we used a variable-delay line (VDL) in the analog domain instead of the digital phase compensator. The prototype chip was fabricate… Show more
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