首页> 外文会议>2011 13th International Conference on Transparent Optical Networks >Predistortion technique for mitigating the Mach-Zehnder modulator nonlinearity effect in DD-OFDM-UWB optical transmission systems
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Predistortion technique for mitigating the Mach-Zehnder modulator nonlinearity effect in DD-OFDM-UWB optical transmission systems

机译:缓解DD-OFDM-UWB光传输系统中Mach-Zehnder调制器非线性效应的预失真技术

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摘要

Predistortion of orthogonal frequency-division multiplexing (OFDM) ultra wideband (UWB) signals is proposed to mitigate the nonlinearity of Mach-Zehnder modulator used as electro-optical converter in direct-detection OFDM-UWB optical communication systems. Theoretical derivation of the predistorter characteristic is performed. Performance results in terms of error vector magnitude (EVM) obtained by numerical simulation of such OFDM-UWB system are presented and discussed. It is shown that 2.5 dB of improvement in the OFDM-UWB system performance can be obtained by using the presented predistortion technique.
机译:为了减轻直接检测OFDM-UWB光通信系统中用作电光转换器的Mach-Zehnder调制器的非线性,提出了正交频分复用(OFDM)超宽带(UWB)信号的预失真。对预失真器特性进行理论推导。给出并讨论了通过这种OFDM-UWB系统的数值模拟获得的基于误差矢量幅度(EVM)的性能结果。结果表明,使用所提出的预失真技术可以使OFDM-UWB系统性能提高2.5 dB。

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