Title :
Identification for the GaN amplifier in OFDM communication system
Author :
Yan Wang ; Li, Ying ; Wang, Jiakai ; Ding, Yuanming
Author_Institution :
Liaoning Key Lab. of Commun. Networks & Inf. Process., Dalian Univ., Dalian, China
Abstract :
An adaptive identification method is proposed to estimate the characteristics of GaN power amplifiers (GaNPA) in orthogonal frequency division multiplexing (OFDM) communication systems. The memory polynomial model (MPM) is adopted to describe the input-output relationship of unknown GaNPA in base-band and the RLS algorithm is used to estimate the MPM parameters of GaNPA in on-line manner. The MPM with odd-even orders is considered in choosing models. Furthermore, the orders and memory length of MPM are decided by the final prediction error (FPE). Finally, the stable and validate GaNPA model is achieved through comprehensively surveying phase and gain characteristics, and convergence of parameter estimation by numerical simulation.
Keywords :
III-V semiconductors; frequency division multiplexing; parameter estimation; polynomials; power amplifiers; GaN amplifier; GaN power amplifiers; OFDM communication system; RLS algorithm; adaptive identification method; final prediction error; input-output relationship; memory polynomial model; numerical simulation; orthogonal frequency division multiplexing; parameter estimation; Adaptation model; Educational institutions; Gallium nitride; Indexes; Information processing; OFDM; Polynomials; GaN power amplifier; Identification; OFDM; polynomial model;
Conference_Titel :
Intelligent Control and Automation (WCICA), 2010 8th World Congress on
Conference_Location :
Jinan
Print_ISBN :
978-1-4244-6712-9
DOI :
10.1109/WCICA.2010.5554774
