Joint Calibration of Frequency Selective Time Variant I/Q-Imbalance and Modulator DC-Offset Error in Broadband Direct-Conversion Transmitters

摘要：

Recently, much attention has been paid to frequency selective I/Q-imbalance, which can seriously limit the performance of broadband direct-conversion transceivers and degrade the baseband pre-linearization of the Power Amplifier in the transmitter. This paper addresses the issue of joint calibration of frequency selective I/Q-imbalance and modulator DC-offset error in the transmitter. The presented parameter estimation requires no pilot signal, making the calibration semi-blind and standard-independent. The proposed digital pre-equalization is very simple. Moreover, the I/Q-imbalance is modeled as slowly time-variant and a seamless I/Q-imbalance and DC-offset error parameter tracking algorithm is developed. The effectiveness of the proposed algorithms is verified by numerical simulations.

作者: Jian Luo Andreas Kortke Wilhelm Keusgen

作者单位: Fraunhofer Institut fuer Nachrichtentechnik, Heinrich-Hertz-Institut, Einsteinufer 37, 10587 Berlin, Germany

会议类型: 国际会议

会议名称: 2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)

会议地点: 成都

会议语种:英文

页码: 255-259

在线出版日期: 2009-07-23（万方平台首次上网日期，不代表论文的发表时间）