Share Email Print
cover

Proceedings Paper • new

A simple wideband digital predistortion system based on improved Powell algorithm
Author(s): Zitong Lan; Qi Zhang; Xiangjun Xin; Qinghua Tian; Ying Tao; Yufei Shen; Guixing Cao; Naijing Liu; Jixi Qian
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In order to solve the analog-to-digital converter (ADC) sampling rate in the traditional digital predistortion (DPD) system must be several times the bandwidth of the original signal to cover the out-of-band intermodulation components caused by nonlinear radio frequency power amplifiers (PA), lowcost ADC cannot meet today's demand problems. This paper proposes a robust iterative DPD coefficient extraction algorithm based on Powell algorithm and random demodulation. This method applies an improved Powell algorithm to a DPD parameter extraction system. The simulation studies the linearization performance of the system. The results show that when the system feedback bandwidth is equal to the original signal bandwidth, satisfactory linearization performance can be obtained. In addition, different from LM algorithm, Powell algorithm does not require partial derivatives of the estimated parameters, the system is simplified.

Paper Details

Date Published: 15 November 2018
PDF: 6 pages
Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644W (15 November 2018); doi: 10.1117/12.2506220
Show Author Affiliations
Zitong Lan, Beijing Univ. of Posts and Telecommunications (China)
Qi Zhang, Beijing Univ. of Posts and Telecommunications (China)
Xiangjun Xin, Beijing Univ. of Posts and Telecommunications (China)
Qinghua Tian, Beijing Univ. of Posts and Telecommunications (China)
Ying Tao, Beijing Univ. of Posts and Telecommunications (China)
Yufei Shen, Beijing Univ. of Posts and Telecommunications (China)
Guixing Cao, Beijing Univ. of Posts and Telecommunications (China)
Naijing Liu, Beijing Univ. of Posts and Telecommunications (China)
Jixi Qian, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 10964:
Tenth International Conference on Information Optics and Photonics
Yue Yang, Editor(s)

© SPIE. Terms of Use
Back to Top