An IQ mismatch calibration and compensation technique for wideband wireless transceivers

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...

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Bibliographic Details
Published inJournal of semiconductors Vol. 35; no. 8; pp. 134 - 139
Main Author 彭锦 周立国 尧横 袁芳 方治 石寅
Format Journal Article
LanguageEnglish
Published 01.08.2014
Subjects
Bandpass filters
Calibration
Compensation
Digital
RF收发器
Semiconductors
Transmitters
Wideband
Wireless communication
不匹配
可变增益放大器
宽带无线通信
无线收发器
智商
自校准技术
补偿技术
Online AccessGet full text
ISSN1674-4926
DOI10.1088/1674-4926/35/8/085003

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Summary: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 1Q 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 802.1 In system and satisfies the requirement of the standard by achieving over 50 dB image suppression.
Bibliography:802.11n; WLAN; image suppression; IQ mismatch; calibration
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 1Q 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 802.1 In system and satisfies the requirement of the standard by achieving over 50 dB image suppression.
11-5781/TN
Peng Jin, Zhou Liguo, Yao Heng, Yuan Fang, Fang Zhi, and Shi Yin（1. Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 2 Suzhou Institute of Nano-Tech and Nano-Bionics （S1NANO）, Chinese Academy of Sciences, Suzhou 215123, China）
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SourceType-Scholarly Journals-1
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ISSN:1674-4926
DOI:10.1088/1674-4926/35/8/085003