Title :
Gradient-based search technique using for M-QAM signals´ DC-offset estimation and compensation
Author :
Pestryakov, A.V. ; Khasianova, E.R.
Author_Institution :
Moscow Tech. Univ. of Commun. & Inf., Moscow, Russia
Abstract :
The possibility of using a gradient search technique to compensate the DC offset at the output of the quadrature converter is investigated in this research. The preliminary compensation of I/Q imbalance is assumed. The results of the work are a simulation model of a demodulator created in MATLAB SIMULINK in order to analyze the use of this method when receiving signals with M-QAM modulation, and frequency spectrum before and after calibration for QAM-4, -16, -32.
Keywords :
quadrature amplitude modulation; search problems; signal processing; DC-offset estimation; I/Q imbalance; M-QAM modulation; frequency spectrum; gradient-based search technique; quadrature converter;
Conference_Titel :
Microwave & Telecommunication Technology (CriMiCo), 2014 24th International Crimean Conference
Conference_Location :
Sevastopol
Print_ISBN :
978-966-335-412-5
DOI :
10.1109/CRMICO.2014.6959371
