Title :
Error sensitivity of power amplifiers using pre-distortion
Author :
Faulkner, Michael ; Johansson, Mats ; Yates, Warren
Author_Institution :
Dept. of Electr. & Electron. Eng., Victoria Univ. of Technol., Melbourne, Vic., Australia
Abstract :
Misalignment between the predistortion correction tables and the nonlinearity of a high-power amplifier produces incomplete cancellation of the nonlinear components in the output signal. The misalignment caused by the modulation and upconversion circuits as well as temperature and loading changes has been analyzed by simulation. For the amplifier chosen, there is a simple power relationship between the adjacent channel leakage (a measure of the misalignment) and many of the tested parameters (carrier leak, differential gain, temperature change, etc.)
Keywords :
errors; linearisation techniques; power amplifiers; radio transmitters; radiofrequency amplifiers; adjacent channel leakage; carrier leak; differential gain; error sensitivity; linearisation techniques; loading changes; modulation circuits; nonlinear component cancellation; power amplifier nonlinearity; predistortion correction tables; radiofrequency amplifiers; temperature change; transmitter; upconversion circuits; Analytical models; Circuit simulation; Circuit testing; Differential amplifiers; Gain measurement; High power amplifiers; Power amplifiers; Power measurement; Predistortion; Temperature sensors;
Conference_Titel :
Vehicular Technology Conference, 1991. Gateway to the Future Technology in Motion., 41st IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-87942-582-2
DOI :
10.1109/VETEC.1991.140529
