Title :
Two calibration methods of wideband quadrature receiver mismatch errors
Author :
Yongjian, Luo ; Genmiao, Yu ; Zhang Shouliong
Author_Institution :
Nat. Lab of Radar Signal Process., Xidian Univ., Xi´´an, China
Abstract :
The theory of digital calibration for the gain and phase imbalances between the in-phase and quadrature branches of a wideband receiver is discussed. Two novel and practical methods for the estimation of the relative amplitude and phase error function are presented, including the least squares and a modification based on the principle of Gram-Schmidt orthogonalization. Computer simulations show their effectiveness
Keywords :
amplitude estimation; calibration; demodulators; least squares approximations; phase estimation; radar receivers; radio receivers; signal processing; Gram-Schmidt orthogonalization; array signal processing; broadband quadrature demodulators; communications receiver; digital calibration; gain imbalance; least squares methods; mismatch errors; phase imbalance; radar receivers; wideband quadrature receiver; Array signal processing; Calibration; Demodulation; Digital filters; Filtering; Frequency; Sampling methods; Signal processing; Signal processing algorithms; Wideband;
Conference_Titel :
Radar, 2001 CIE International Conference on, Proceedings
Conference_Location :
Beijing
Print_ISBN :
0-7803-7000-7
DOI :
10.1109/ICR.2001.984719
