摘要
为了满足现代雷达系统对高倍频、大时间带宽积线性调频信号的应用要求,提出并验证了一种利用两级联双平行马赫-曾德尔调制器和循环二次相位调制回路相结合的16倍频线性调频信号生成方案。经理论分析和仿真验证,当射频驱动信号频率为10 GHz时,可生成中心频率为160 GHz、带宽为32 GHz、时间带宽积(TBWP)为310.3的线性调频信号。为了获得更高的TBWP,一方面在时域上对抛物线驱动信号进行拉伸或对其进行相位编码增加生成信号时宽,另一方面将抛物线驱动信号分割成多段增加生成信号带宽。结果表明,经过上述处理,可生成TBWP为1272.05、966.04、15346.75的线性调频信号,该结果与理论分析吻合较好。
In order to meet the application requirements of modern radar systems for linear frequency modulation(LFM)signals with high frequency and large time bandwidth product,a frequency 16-tupling LFM signal generation scheme using a cascaded double parallel MachZehnder modulator and a cyclic secondary phase modulation loop structure is proposed.After theoretical analysis and simulation,it is verified that a LFM signal with a center frequency of 160 GHz,a bandwidth of 32 GHz,and a time bandwidth product(TBWP)of 310.3 can be generated when the radio frequency drive signal frequency is 10 GHz.In order to further improve the time bandwidth product of the generated signal,on the one hand,the parabolic drive signal is stretched or phase coded in the time domain to increase the time bandwidth of the generated signal.On the other hand,the parabolic drive signal is divided into multiple segments to increase the bandwidth of the generated signal.The results show that after the above processing,LFM signals with TBWP of 1272.05,966.04,and 15346.75 can be generated,and the results are in good agreement with the theoretical analysis.
作者
邢毓华
段沁霖
Xing Yuhua;Duan Qinlin(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第19期152-160,共9页
Laser & Optoelectronics Progress
关键词
光通信
双平行马赫-曾德尔调制器
线性调频信号
16倍频
时间带宽积
相位调制
optical communications
double parallel MachZehnder modulator
linear frequency modulation signal
frequency 16-tupling
time bandwidth product
phase modulation
