基于查找表的光纤无线链路动态范围增强自适应预失真

1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI:10.1109/PACRIM.1999.799469

Xavier N Fernando, A. Sesay

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引用次数: 11

摘要

在微蜂窝环境下，光纤无线电(ROF)链路的最大限制是由于激光非线性导致的有限动态范围(DR)。本文首次提出了一种基于查找表的自适应预失真方案来提高ROF链路线性度。自适应过滤器训练自己生成表项，不需要事先知道链路的物理参数。在传输数据时，按符号速率对每个符号进行预失真以补偿信道失真。实验和仿真结果表明，该方法具有良好的性能改进效果。激光二极管的功率处理能力是其极限。如果允许有限的AM-AM失真，该方案可以进一步简化，这不会显著地导致系统退化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Look-up table based adaptive predistortion for dynamic range enhancement in a radio over fiber link

The biggest limitation of radio over fiber (ROF) links in a microcellular environment is the limited dynamic range (DR) due to laser nonlinearity. In this paper for the first time, a look-up table based adaptive predistortion scheme is proposed to enhance the ROF link linearity. An adaptive filter trains itself to generate table entries and no prior knowledge of link physical parameters is needed. When data is transmitted, each symbol is pre-distorted at the symbol rate to compensate channel distortion. Experimental and simulation results show excellent performance improvement. The power handling capability of the laser diode is the upper limit. This scheme can be further simplified if limited AM-AM distortion is allowed which does not significantly contribute to system degradation.

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来源期刊

1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)

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