THE METHOD ESTIMATING IQ IMBALANCE USING SIGNAL POWER CONSTRAINED CONDITION IN OFDM SYSTEM

Abstract
IQI (I/Q Imbalance) is caused by I, Q path gain disagreement and quadrature phase incomplete generation ?f. IQI is parasitic noise about one frequency in LO frequency band. IQI estimation and compensating method analyzed on slow frequency fading channel and all most previous works estimate and compensate FIIQI only and it has much complexity, as adaptive and Kalman filtering is done when estimating and compensating FSIQI. We propose the method estimating and compensating method using signal energy constrained condition. In this method, FI and FS IQI are compensated simultaneously and Kalman filtering is not used. Also, the robustness to frequency selective channel is high.

Authors
Yong Chan Lee1, Song Chol Ho2, Won Chol Jang3
Wonsan Jogunsil University of Technology, D.P.R. of Korea1,2, Kim Il Sung University, D.P.R. of Korea3

Keywords
OFDM, IQ Imbalance, Frequency Fading Channel
Published By :
ICTACT
Published In :
ICTACT Journal on Communication Technology
( Volume: 9 , Issue: 4 )
Date of Publication :
Decemebr 2018

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