A quadrature modulation system
作者： Hajime Hamada , Kazuo Nagatani , Hiroyoshi Ishikawa , Nobukazu Fudaba , Tokuro Kubo
DOI:
关键词: Signal transfer function 、 Control theory 、 Quadrature filter 、 Component (thermodynamics) 、 Amplitude 、 Physics 、 Quadrature modulation 、 Signal transition 、 Quadrature (mathematics) 、 Signal 、 Acoustics
摘要: A quadrature modulation system wherein a first inphase signal component and orthogonal are input, provided to modulator for outputting an output that is modulated by the modulator, part of said serving as feedback consisting second component, comprising: amplitude difference calculation means obtaining error between average amplitudes when real axis imaginary point arrangement rotated predetermined angle amount, amount based on error; adjustment adjusting such compensated for.
lens.org 参考文章(17)
Levent Aydin, Robert W. Boesel, Lindsay A. Weaver, System, method and computer program product for controlling a transmit signal using an expected power level ,(1998)
Hans-Otto Scheck, Digital imbalance correction method and device ,(2003)
Vladimir Parizhsky, Junyi Li, Methods and apparatus for I/Q imbalance compensation ,(2002)
David R. Gildea, Allen P. Edwards, Chung Y. Lau, Calibration of vector modulators using a scalar detector ,(1986)
Mika Rättö, Correction of phase and amplitude imbalance of i/q modulator ,(2001)
Steven J. Bennett, Andrew S. Wright, Use of antiphase signals for predistortion training within an amplifier system ,(2000)
Yukinari Fujiwara, Masayuki Kanazawa, Communication system control method and communication system using the method ,(1997)
Hiroshi Suzuki, Quadrature amplitude modulator with distortion compensation ,(1992)
Wolfdietrich Georg Kasperkovitz, Mirror suppression circuit in a quadrature demodulator ,(2003)
Karl-Gösta Emanuel Sahlman, Method and apparatus for plurality signal generation ,(2001)