Title :
Digital memory-based predistortion
Author :
McBeath, Sean ; Pinckley, Danny
Author_Institution :
Motorola Labs, Fort Worth, TX, USA
Abstract :
A predistortion algorithm based on a memory-based power amplifier model (PA) is presented. The algorithm was tested using a PA measurement system. The predistortion techniques are based on the filtered tapped delay line (TDL) model. Memoryless predistortion techniques are also presented to show the benefits of the memory-based predistortion approach. Memoryless predistortion reduces third order IM by 5-8 dB, while memory-based predistortion reduces third order IM by 18-20 dB.
Keywords :
active filters; delay lines; intermodulation distortion; linearisation techniques; power amplifiers; signal processing; digital memory; filtered tapped delay line model; intermodulation distortion; measurement system; memoryless predistortion techniques; power amplifier model; Delay lines; Intermodulation distortion; Linearization techniques; Nonlinear filters; Polynomials; Power amplifiers; Power measurement; Power system modeling; Predistortion; System testing;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1517150
