Title :
Adaptive Quadrature Modulation Compensation for Direct Conversion Transmitter
Author :
Pan Hong ; Hou Ya Hui ; Guo Xuan
Author_Institution :
Eng. Reasearch Center of Digital Audio & Video Minist. of Educ., Commun. Univ. of China, Beijing, China
Abstract :
In this paper, a new novel adaptive quadrature modulation compensation (QMC) scheme is proposed for direct conversion transmitter, which can compensate either the I/Q imbalance or carrier leakage and requires no special waveforms or training sequences. By analyzing the error of quadrature modulation, a distortion model is designed. Based on the distortion model, the adaptive QMC algorithm is presented, and the implementation structure of the algorithm is introduced. The simulation results show that this algorithm can accurately estimate and correct I/Q imbalance and the DC offset.
Keywords :
adaptive modulation; quadrature amplitude modulation; I/Q imbalance; adaptive QMC algorithm; adaptive quadrature modulation compensation; carrier leakage; direct conversion transmitter; distortion model; quadrature modulation error; special waveform; training sequence; Amplitude modulation; Baseband; OFDM; RF signals; Radio frequency; Transmitters; DC offset; Direct Conversion Transmitter; I/Q imbalance; adaptive QMC algorithm;
Conference_Titel :
Computational Intelligence and Design (ISCID), 2014 Seventh International Symposium on
Print_ISBN :
978-1-4799-7004-9
DOI :
10.1109/ISCID.2014.149
