Modeling and research on clipping noise in optical OFDM systems
Modeling and research on clipping noise in optical OFDM systems
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发表时间：
2012
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通讯作者：
Wang Yong
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作者：
Wang Yong
针对光正交频分复用（OFDM）系统中峰均功率比（PAPR）较高的问题，研究了削波降低PAPR的原理，基于该原理，通过对大量数据的分析和计算，建立了MQAM调制下光OFDM系统的削波噪声模型，根据所建立的模型，仿真结果表明，所建立的限幅噪声模型曲线与不同调制方式下的光OFDM系统仿真模型曲线吻合较好，而且，在不同削波比下，两条曲线的均方误差（MSE）最大值不超过1.26×10-2，证明了所建立的削波噪声模型的可行性和适用性。
According to the problem of the high peak-to-average power ratio(PAPR) in optical orthogonal frequency division multiplexing(OFDM) systems,the principle of PAPR reduction method by clipping is studied.Based on this principle,a clipping noise model of optical OFDM systems in the MQAM modulation is established by analyzing and computing a large number of data.According to the established model,the error-symbol-rates of optical OFDM systems in different modulations can be directly calculated after clipping.The simulation results show that the curve of the established clipping noise model agrees well with that of the simulation model of optical OFDM systems in different modulations.Furthermore,the maximum value of the mean square error(MSE) between the two curves in different clipping ratios is not more than 1.26×10-2,Which demonstrates the feasibility and applicability of the established clipping noise model.