Title :
Analysis of ACPR performance for memoryless predistorter considering power amplifier memory effects
Author :
Ku, Hyunchul ; Kenney, J. Stevenson
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Memory effects in a power amplifier (PA) limit the improvement of performance for predistortion linearizers based on memoryless look-up table (LUT) or model-based architectures. This paper investigates degradation of the adjacent channel power ratio (ACPR) improvement for a PA with memoryless predistortion linearizer with respect to the memory effects. Using the input and output complex envelope signals of PA, the ACPR degradation due to memory effects is analytically extracted. A 170 W PEP LDMOS PA is measured and its ACPR performance degradation due to memory effects is analyzed using a memoryless predistortion linearizer.
Keywords :
Volterra series; linearisation techniques; memoryless systems; nonlinear distortion; power amplifiers; table lookup; 170 W; PEP LDMOS PA; Volterra series; adjacent channel power ratio; complex envelope signal; input-output signals; memory effects; memoryless look-up table; memoryless predistorter; model-based architecture; power amplifier; power ratio degradation; predistortion linearizer; Computer architecture; Degradation; Hardware; Interference; Performance analysis; Power amplifiers; Power engineering and energy; Power engineering computing; Predistortion; Table lookup;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1338970
