Title :
A memory-efficient LUT-based AM/AM digital predistortor for UHF RFID reader
Author :
Yang, Yuqing ; Liu, Zongming ; Xi Tan ; Min, Hao
Author_Institution :
State key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
Digital predistortion is one of the most successful approaches to linearize a nonlinear power amplifier. However in most lookup-table (LUT) based digital predistorters, memories are not efficiently used because they are uniformly spaced. In this paper, a simple but effective method is proposed to make the LUT size significantly reduced. This method applies A-law companding to space the table and linear interpolation technique to reconstruct the predistorted output. Implementation and verification of a memory-efficient AM/AM digital predistorter for UHF RFID reader transmitter is also given in this paper.
Keywords :
digital circuits; power amplifiers; radiofrequency identification; table lookup; A-law companding; UHF RFID reader transmitter; digital predistortion; linear interpolation technique; lookup-table based digital predistorters; memory-efficient LUT-based AM/AM digital predistorter; nonlinear power amplifier; Amplitude modulation; Costs; Degradation; Interpolation; Power amplifiers; Power system modeling; Predistortion; Radiofrequency identification; Solid modeling; Table lookup; Digital predistortion; Memory-less Linearization; Power Amplifier; RFID reader;
Conference_Titel :
ASIC, 2009. ASICON '09. IEEE 8th International Conference on
Conference_Location :
Changsha, Hunan
Print_ISBN :
978-1-4244-3868-6
Electronic_ISBN :
978-1-4244-3870-9
DOI :
10.1109/ASICON.2009.5351342
