CAJ | 학술논문

基于多个不同权重与时延的doublet脉冲叠加,提出一种新的多带通超宽带( MB-UWB)信号光学产生与传输的方法。射频( RF)信号对光载波进行强度调制后,电高斯脉冲对光信号进行相位调制并利用标准单模光纤( SMF)进行传输。 SMF实现相位调制-强度调制( PM-IM)转换,产生doublet脉冲；实现多个doublet信号的时延差,产生叠加的UWB信号。通过调节RF信号源的频率可以实现UWB信号中心频率和带宽的改变；通过调节RF信号源的幅度可以实现边带抑制比的改变。仿真实现了边带抑制比大于25dB,中心频率5~8GHz,带宽2.9~3.8GHz的UWB的信号产生。
기우다개불동권중여시연적doublet맥충첩가,제출일충신적다대통초관대( MB-UWB)신호광학산생여전수적방법。사빈( RF)신호대광재파진행강도조제후,전고사맥충대광신호진행상위조제병이용표준단모광섬( SMF)진행전수。 SMF실현상위조제-강도조제( PM-IM)전환,산생doublet맥충；실현다개doublet신호적시연차,산생첩가적UWB신호。통과조절RF신호원적빈솔가이실현UWB신호중심빈솔화대관적개변；통과조절RF신호원적폭도가이실현변대억제비적개변。방진실현료변대억제비대우25dB,중심빈솔5~8GHz,대관2.9~3.8GHz적UWB적신호산생。
A novel method is proposed to optically generate and transmit multiband ultra-wide band ( MB-UWB) pulses based on the summation of multiple doublet pulses with different weights and proper time delays. RF signal are used to mod-ulate the amplitude of optical signals to get multi-wavelength source. The optical signal is then modulated with Gaussian pulse and fed into a section of single-mode fiber ( SMF ) . SMF can implement phase modulation to intensity modulation ( PM-IM) conversion to generate Gaussian doublet pulse, and proper time delays to sum different weights Gaussian doublet pulses. The center frequency and bandwidth of generated pulse is determined by RF frequency. The side lobe suppression is the contribution of apodization shape, which is determined by the RF modulation voltage. So it's easy and possible to tune the center frequency and bandwidth of sub-bands. MB-UWB pulses with side lobe suppression levels over 25 dB are ob-tained with central frequency from 5GHz to 8GHz and a bandwidth from 2. 9GHz to 3. 8 GHz.