Fig. 1.
The transceiver with IQ mismatch calibration based on the digital baseband
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| Citation: |
Jin Peng, Liguo Zhou, Heng Yao, Fang Yuan, Zhi Fang, Yin Shi. An IQ mismatch calibration and compensation technique for wideband wireless transceivers[J]. Journal of Semiconductors, 2014, 35(8): 085003. doi: 10.1088/1674-4926/35/8/085003
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J Peng, L G Zhou, H Yao, F Yuan, Z Fang, Y Shi. An IQ mismatch calibration and compensation technique for wideband wireless transceivers[J]. J. Semicond., 2014, 35(8): 085003. doi: 10.1088/1674-4926/35/8/085003.
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An IQ mismatch calibration and compensation technique for wideband wireless transceivers
DOI: 10.1088/1674-4926/35/8/085003
More Information
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Abstract
An IQ mismatch calibration and compensation technique based on the digital baseband for wideband wireless communication transmitters is proposed. The digital baseband transmits the signal used for IQ mismatch calibration. The signal passes through the RF transmitter path, the calibration loop (which is composed of a square power detector and a band-pass filter in the RF transceiver) and the variable gain amplifier of the receiver. The digital baseband samples the signal for IQ mismatch estimation and compensates for it. Compared with the self-calibration technique in the RF chip, the proposed technique saves area and power consumption for the wireless local area network solution. This technique has been successfully used for the 802.11n system and satisfies the requirement of the standard by achieving over 50 dB image suppression.-
Keywords:
- 802.11n,
- WLAN,
- image suppression,
- IQ mismatch,
- calibration
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References
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