Title :
Loop-Delay Estimation for Digital Predistortion System
Author :
Kong, Xiaowei ; He, Zishu ; Xia, Wei
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper introduces an algorithm for estimating loop-delay in digital predistortion (DPD) system. The algorithm includes two parts: integer loop-delay estimation and fractional loop-delay estimation. The integer loop-delay estimation adopts correlation function and digital differentiator to search the estimate. The fractional part gets the convergence value through LMS algorithm based on interpolation filter structure. Finally, the validity of the algorithm and the effect for DPD system is proved through the experiment simulations.
Keywords :
correlation methods; delay estimation; differentiation; linearisation techniques; correlation function; digital differentiator; digital predistortion system; fractional loop-delay estimation; integer loop-delay estimation; Correlation; Delay; Estimation; Least squares approximation; Nonlinear distortion; Predistortion;
Conference_Titel :
Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-3708-5
Electronic_ISBN :
978-1-4244-3709-2
DOI :
10.1109/WICOM.2010.5601050
