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http://dx.doi.org/10.5515/KJKIEES.2009.20.1.100

Analysis of the Characteristics for Quadrature Receivers Adopting an Auto-Calibration Method  

Kwon, Soon-Man (Korea Electrotechnology Research Institute)
Kim, Seog-Joo (Korea Electrotechnology Research Institute)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.20, no.1, 2009 , pp. 100-106 More about this Journal
Abstract
This paper deals with an estimation problem of the gain and phase imbalances between the in-phase and quadrature components in the quadrature receivers which are widely used in wireless communications. It is shown that the estimates derived from the suggested auto-calibration algorithm is asymptotically minimum-variance unbiased as a function of the sampling time. In order to show this characteristic, the probability density functions of the estimates for the gain and phase imbalances are derived first. Then the mean and variance functions are investigated analytically or numerically based on the density functions.
Keywords
Quadrature Receiver; Phase Imbalance; Gain Imbalance; Auto-Calibration;
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