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http://dx.doi.org/10.5573/ieie.2015.52.2.018

Estimation of I/Q Imbalance Parameters for Repeater using Direct Conversion RF with Low Pass Filter Mismatch  

Yun, Seonhui (LIG Nex1)
Lee, Kyuyong (A2U Information & Communications Technology)
Ahn, Jaemin (Department of Information Communications Engineering, Chungnam National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.2, 2015 , pp. 18-26 More about this Journal
Abstract
In this paper, we studied the method for analyzing and estimating the parameters that induce I/Q imbalance in the repeater using direct conversion RF. In repeater, amplitude, phase, and filter mismatch are generated in the receiving-end which converts RF signal to baseband signal. And amplitude and phase mismatch are generated in the transmitting-end which converts baseband signal to RF signal. Accordingly, we modeled the parameters that cause I/Q imbalance in the structure of the repeater in order, and proposed a feedback test structure from the transmitting-end to the receiving-end for estimating the corresponding parameters. By comparing the test transmitting signal and received signal, it is possible to estimate the I/Q imbalance parameters which occurred from mixed components of real and imaginary part. And it was confirmed that I/Q imbalance phenomenon has been properly compensated with estimated parameters at the direct conversion RF repeater.
Keywords
I/Q Imbalance; Direct Conversion; Low Pass Filter; Estimation; Repeater;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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