Acta Metallurgica Sinica(English letters) ›› 2012, Vol. 19 ›› Issue (2): 43-47.doi: 10.1016/S1005-8885(11)60244-6

• Wireless • Previous Articles     Next Articles

New predistorter using triangular memory polynomial for power amplifier of OFDM-based wireless broadband communication system


  1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2011-06-20 Revised:2011-12-20 Online:2012-04-30 Published:2012-04-17
  • Contact: Cui-ping Yu
  • Supported by:

    This work was supported by the National Science and Technology Major Project (2010ZX03007-003-04).


A triangular memory polynomial (TMP) predistorter is presented in this paper to linearize a power amplifier’s nonlinear with memory effects. Compared with the traditional memory polynomial (MP) predistorter, the coefficients of TMP predistorter is reduced more than 75%, which can effectively decrease the implementation complexity. The coefficients of predistorter are directly extracted from an offline system identification process by an open-loop structure in our approach. Several signals with data rate 5 MHz, 10 MHz, 15 MHz and 20 MHz are used to verify the performance of the proposed predistorter. Experimental results show that the proposed TMP predistorter and the traditional MP predistorter almost have the same performance.

Key words:

power amplifier, predistortion, memory effects, memory polynomial