基于微波光子微分原理的灵活UWB信号产生方法

Flexible method to generate UWB signals based on microwave photonic differentiation

为了有效克服传统电子信号发生器在工作带宽和工作频率方面存在的电子瓶颈,满足未来光载超宽带系统应用需要,提出了一种光子学超宽带(UWB)信号产生方法。基于微波光子微分的原理,该方法在光域中对高斯脉冲进行灵活处理,进而实现UWB信号的产生。通过理论推导和计算机仿真,对所提方法进行了分析与验证,结果表明,该方法可根据需要实现多种UWB信号波形的产生与调制。此外,通过对系统进行优化配置,还可在输出UWB信号的功率谱中引入一个频率可调的零点,从而避免UWB信号与现有WiFi信号之间的相互干扰。

In order to overcome the bottleneck of the traditional electronic waveform generators in working bandwidth and frequency,and to meet the demand of future UWB over fiber systems,an approach to generating ultra-wideband（UWB）signals based on microwave photonic differentiation of electronic Gaussian pulses was proposed in this paper.Theoretical model describing the proposed approach was derived,which is verified by computer simulations.The results show that the proposed system can generate and modulate UWB signals in a very flexible manner,and can also introduce a tunable spectral notch-band into the generated UWB signal power spertum,which can realize interference avoidence between UWB signals and WiFi signals.