宽带OFDM系统中的简化滤波查表预失真算法

doi:10.3969/j.issn.1001506X.2010.07.004

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

宽带OFDM系统中的简化滤波查表预失真算法

任智源，韩燕，张海林，郭凯

(西安电子科技大学综合业务网理论与关键技术国家重点实验室, 陕西西安 710071)

出版日期:2010-07-20 发布日期:2010-01-03

Simplified filter lookup table method in wideband OFDM system

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

(State Key Laboratory of Integrated Services Network, Xidian Univ., Xi’an 710071, China)

Online:2010-07-20 Published:2010-01-03

摘要/Abstract

摘要：

为了解决宽带正交频分复用（orthogonal frequency division multiplexing, OFDM)系统中放大器有记忆非线性特性给系统带来的失真问题，提出了一种简化的滤波查表(simplified filter lookup table, SFLUT)预失真方法。该方法由一个无记忆预失真器子系统串联一个自适应滤波器子系统构成，能有效解决放大器带来的失真问题,同时采用简化的自适应更新结构，可以弥补原滤波查表法反馈支路结构复杂、收敛精度低的缺点。

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.

任智源，韩燕，张海林，郭凯. 宽带OFDM系统中的简化滤波查表预失真算法[J]. Journal of Systems Engineering and Electronics, 2010, 32(7): 1369-1372.

REN Zhiyuan, HAN Yan, ZHANG Hailin, GUO Kai. Simplified filter lookup table method in wideband OFDM system[J]. Journal of Systems Engineering and Electronics, 2010, 32(7): 1369-1372.

宽带OFDM系统中的简化滤波查表预失真算法

Simplified filter lookup table method in wideband OFDM system

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