Amplitude imbalance compensation of quadrature modulator

作者: Juha Heiskala , Lauri Kuru

DOI:

关键词: Quadrature filterControl theoryPulse-amplitude modulationQuadrature amplitude modulationIn-phase and quadrature componentsSignalPhysicsAcousticsQuadrature modulationModulationElectro-optic modulator

摘要: A method and an arrangement for compensating amplitude imbalance of a quadrature modulator comprising: means determining first correlation on the basis modulation signal output modulator; second producing compensation proportional to ratio determined correlations signals; processing at least one signals with signal; wherein are arranged use unprocessed correlations.

参考文章(26)
Shinichi Ohmagari, Multi-phase PSK modulation apparatus ,(1988)
Vijay N. Wagh, Robert E. Kaiser, Cornellius Moses, Richard L. Demers, Paul B. Walton, Leland A. Denny, James Keough, Telephone call forwarding device ,(1990)
P. Goud, C. Englefield, A. Lohtia, An adaptive digital technique for compensating for analog quadrature modulator/demodulator impairments Proceedings of IEEE Pacific Rim Conference on Communications Computers and Signal Processing. ,vol. 2, pp. 447- 450 ,(1993) , 10.1109/PACRIM.1993.407325
M. Faulkner, T. Mattsson, W. Yates, Automatic adjustment of quadrature modulators Electronics Letters. ,vol. 27, pp. 214- 216 ,(1991) , 10.1049/EL:19910139
G. Yang, G. Vos, H. Cho, I/Q modulator image rejection through modulation pre-distortion vehicular technology conference. ,vol. 2, pp. 1317- 1320 ,(1996) , 10.1109/VETEC.1996.501526
R. Marchesani, Digital precompensation of imperfections in quadrature modulators IEEE Transactions on Communications. ,vol. 48, pp. 552- 556 ,(2000) , 10.1109/26.843122