IQ imbalance estimation and compensation method for ultra-wideband receiver

被引：0
|
作者：
Xu Z. [1 ]
Liu P. [1 ]
Ren S. [2 ,3 ]
Cheng Y. [2 ]
机构：
[1] School of Information and Communication Engineering, Beijing Information Science & Technology University, Beijing
[2] School of Information and Electronics, Beijing Institute of Technology, Beijing
[3] Shandong Provincial Key Laboratory of Optical Communication Science and Technology, Institute of Physics Science and Information Engineering, Liaocheng University, Liaocheng
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2018年 / 39卷 / 06期
关键词：
IQ imbalance; Joint time-frequency estimation; OFDM; UWB;
D O I：
10.19650/j.cnki.cjsi.J1803382
中图分类号：
学科分类号：
摘要：
Aiming to solve the problem of system performance degradation due to the IQ imbalance in multi-band orthogonal frequency division multiplexing ultra wideband (MB-OFDM-UWB) receiver, one kind of approach based on estimating and compensating IQ imbalance parameters is proposed. Firstly, the preamble symbol is utilized to estimate the IQ imbalance in the time domain to complete the pre-compensation. Then, the designed interleaved pilot is adopted to estimate and compensate the residual IQ imbalance by section in the frequency domain. Simulation results show that the proposed method in joint time-frequency domain is better than that in single time domain when the SNR is more than 8 dB in frequency-dependent IQ imbalance situation. Experimental results show that the problem of IQ branch inconsistency existing in UWB systems can be effectively solved, and the performance improvement is remarkable. © 2018, Science Press. All right reserved.
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页码：157 / 163
页数：6
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