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IEICE TRANSACTIONS on Communications

Automatic IQ Imbalance Compensation Technique for Quadrature Modulator by Single-Tone Testing

Minseok KIM, Yohei KONISHI, Jun-ichi TAKADA, Boxin GAO

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Summary :

This letter proposes an automatic IQ imbalance compensation technique for quadrature modulators by means of spectrum measurement of RF signal using a spectrum analyzer. The analyzer feeds back only magnitude information of the frequency spectrum of the signal. To realize IQ imbalance compensation, the conventional method of steepest descent is modified; the descent direction is empirically determined and a variable step-size is introduced for accelerating convergence. The experimental results for a four-channel transmitter operating at 11 GHz are presented for verification.

Publication
IEICE TRANSACTIONS on Communications Vol.E95-B No.5 pp.1864-1868
Publication Date
2012/05/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E95.B.1864
Type of Manuscript
LETTER
Category
Wireless Communication Technologies

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