| RF power and I/Q imbalance calibration in B3G/4G MIMO-OFDM systems |
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| 引用本文： | LI Ya-zhuo ZHOU Ming-yu,ZHANG Ping Wireless Technologies Innovation Institute,Key Laboratory of Universal Wireless Communication Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China. RF power and I/Q imbalance calibration in B3G/4G MIMO-OFDM systems[J]. 中国邮电高校学报(英文版), 2007, 14(2): 89-93. DOI: 10.1016/S1005-8885(07)60132-0 |
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| 作者姓名： | LI Ya-zhuo ZHOU Ming-yu ZHANG Ping Wireless Technologies Innovation Institute Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China |
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| 作者单位： | LI Ya-zhuo ZHOU Ming-yu，ZHANG Ping Wireless Technologies Innovation Institute，Key Laboratory of Universal Wireless Communication Ministry of Education，Beijing University of Posts and Telecommunications，Beijing 100876，China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | Radio frequency (RF) front-end nonidealities in multi-input and multi-output (MIMO) systems are more serious than in single-input and single-output systems and must be calibrated. According to the effects of RF power and in-phase/quadrature-phase (I/Q) imbalance, calibration methods for multi-input and multi-output-orthogonal frequency division multiplexing (MIMC-OFDM) systems in transmitter and interference in receiver are improved, respectively, in this article. Furthermore, a calibration scheme including I/Q imbalance errors and amplitude variations is proposed and implemented in the B3G/4G time division duplex communication system. Simulation results show that the calibration algorithms are feasible, and the bit error rate (BER) performances for MIMO-OFDM systems are improved after calibrations.
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| 收稿时间： | 2006-11-26 |
RF power and I/Q imbalance calibration in B3G/4G MIMO-OFDM systems |
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| LI Ya-zhuo,ZHOU Ming-yu,ZHANG Ping. RF power and I/Q imbalance calibration in B3G/4G MIMO-OFDM systems[J]. The Journal of China Universities of Posts and Telecommunications, 2007, 14(2): 89-93. DOI: 10.1016/S1005-8885(07)60132-0 |
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| Authors: | LI Ya-zhuo ZHOU Ming-yu ZHANG Ping |
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| Affiliation: | Wireless Technologies Innovation Institute, Key Laboratory of Universal Wireless Communication Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | Radio frequency (RF) front-end nonidealities in multi-input and multi-output (MIMO) systems are more serious than in single-input and single-output systems and must be calibrated. According to the effects of RF power and in-phase/quadrature-phase (I/Q) imbalance, calibration methods for multi-input and multi-output-orthogonal frequency division multiplexing (MIMC-OFDM) systems in transmitter and interference in receiver are improved, respectively, in this article. Furthermore, a calibration scheme including I/Q imbalance errors and amplitude variations is proposed and implemented in the B3G/4G time division duplex communication system. Simulation results show that the calibration algorithms are feasible, and the bit error rate (BER) performances for MIMO-OFDM systems are improved after calibrations. |
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| Keywords: | calibration B3G/4G MIMO-OFDM front-end I/Q imbalance |
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