Journal of Systems Engineering and Electronics ›› 2010, Vol. 32 ›› Issue (7): 1369-1372.doi: 10.3969/j.issn.1001506X.2010.07.004

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Simplified filter lookup table method in wideband OFDM system

REN Zhiyuan, HAN Yan, ZHANG Hailin, GUO Kai   

  1. (State Key Laboratory of Integrated Services Network, Xidian Univ., Xi’an 710071, China)
  • Online:2010-07-20 Published:2010-01-03

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Abstract:

To solve the problem of distortion caused by power amplifier in memory orthogonal frequency division multiplexing (OFDM) system, a new simplified filter lookup table (SFLUT) method is proposed based on the FLUT method. The SFLUT method is composed by a memoryless predistorter subsystem and an adaptive filter subsystem in series. Its updating part is simplified compared to FLUT. The simulation results indicate that the proposed method is less complicated and has higher precision than the original FLUT structure, and can compensate the distortion effectively.

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