摘要
针对超宽带信号与其他窄带无线接入信号之间的频谱重叠和相互干扰问题,研究了具有干扰回避能力的光子学超宽带信号产生技术,提出了一种具有干扰回避能力的光子学超宽带信号产生方法。基于相位调制-强度调制转换原理,实现了超宽带信号的光子学产生;同时结合对干扰回避的考虑,利用一个光学窄带陷波器结构,在系统输出的超宽带信号频谱中引入了一个频谱零点。通过理论分析和计算机仿真验证了所提方法的性能。研究结果表明,所产生的超宽带信号中,频谱零点的深度可达到30dB,且频率位置可灵活调谐,能有效回避超宽带信号与现有窄带无线接入信号之间的干扰。
Ultra-wideband（UWB）signals occupy a wide frequency band,overlapping with the existing narrow band wireless access signals.Photonic generation of UWB signals with the consideration of interference avoidance between UWB sgnals and narrow band siganls was studied,and an approach to photonic generation of UWB signals was proposed based on the phase modulation to intensity modulation conversion technique.By using an optical notch filter,the proposed approach can introduce a tunable spectral notchband into the generated UWB signal spectrums.Theoretical model describing the proposed approach was derived and verified by computer simulations.The results show that the frequency location of the notchband can be flexibly tuned,and its depth can reach up to 30 dB,which can realize interference avoidance between UWB signals and the existing narrow band wireless signals.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2015年第6期507-512,共6页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61032005)
江苏省自然科学基金资助项目(BK20140069)
关键词
超宽带
干扰回避
窄带陷波器
ultra-wideband（UWB）
interference avoidance
narrow band notch filter
