Title :
An improved LUT based predistortion method for HPA with memory effects in WCDMA systems
Author :
Yang, Xiaoli ; Wu, Xiaofang ; Shi, JiangHong
Author_Institution :
Sch. of Inf. Sci. & Technol., Xiamen Univ., Xiamen, China
Abstract :
In this paper, we focus on the 2D LUT (2-dimension look-up table) techniques for the mitigation of HPAs´ (high power amplifiers´) memory effects when transmitting WCDMA wideband signal. On the basis of the previous method, an improved two-dimensional LUT indexing method for HPA predistortion with memory is proposed. Simulation and experimental results show that the proposed method has more effective predistortion capabilities compared with the previous method.
Keywords :
code division multiple access; distortion; power amplifiers; table lookup; 2D look-up table; WCDMA systems; high power amplifiers; memory effects; predistortion method; Finite impulse response filter; High power amplifiers; Indexing; Information science; Large-scale systems; Multiaccess communication; Nonlinear filters; Polynomials; Predistortion; Table lookup; LUT; WCDMA; memory effects; predistortion;
Conference_Titel :
Communications Technology and Applications, 2009. ICCTA '09. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4816-6
Electronic_ISBN :
978-1-4244-4817-3
DOI :
10.1109/ICCOMTA.2009.5349143
