Title :
Correction of mixer nonlinearity in quadrature modulators
Author :
Faulkner, Michael ; Johansson, Mikael
Author_Institution :
Dept. of Electr. & Electron. Eng., Victoria Univ. of Technol., Melbourne, Vic., Australia
Abstract :
Baseband preconditioning is used to partially cancel third order nonlinearities in mixers. Calibration is by means of a simple diode detector, but requires the presence of a carrier leak signal. The technique led to an improvement of 8 dB in IM3 for a 900 MHz system.
Keywords :
calibration; error correction; intermodulation; mixers (circuits); modulators; 900 MHz; UHF; baseband preconditioning; calibration; carrier leak signal; diode detector calibration; intermodulation products; mixer nonlinearity; quadrature modulators; third order nonlinearities;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920181
