FRFT-OFDM系统分数阶鲁棒性

2015 IEEE International Conference on Communication Software and Networks (ICCSN) Pub Date : 2015-06-06 DOI:10.1109/ICCSN.2015.7296162

Pengfei Shi, Dongjie Qi, Miao Li, H. Huan

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引用次数: 4

摘要

分数阶傅立叶变换(FRFT)被广泛应用于正交频分(OFDM)系统中以对抗双色散信道。分数阶的敏感性是一个严重的问题。本文基于FRFT-OFDM系统的数学表达式，导出了变量阶的封闭形式及其最优值。理论结果证明了分数阶p = 0.5是双色散信道下FRFT-OFDM系统的全局最优分数阶。仿真结果验证了分数阶0.5在FRFT-OFDM系统中的鲁棒性。

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Robustness of fractional order for FRFT-OFDM systems

Fractional Fourier transform (FRFT) has been widely used in orthogonal frequency division (OFDM) systems to combat the doubly dispersive channels. The sensitivity of the fractional order is a serious problem. In this paper, we derive the closed form of the variable order and its optimal value based on the mathematical expression in the FRFT-OFDM systems. The theoretical results prove that the fractional order p = 0.5 is the global optimal fractional order for the FRFT-OFDM system in doubly dispersive channels. Furthermore, simulation results verify the robustness of fractional order 0.5 in the FRFT-OFDM systems.

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2015 IEEE International Conference on Communication Software and Networks (ICCSN)

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