基于单比特压缩感知的光子辅助微波频谱检测方法  

Photonics-assisted Microwave Spectrum Detection Method Based on One-bit Compressive Sensing

作　　者：高嘉威 方金鹏 江利中 黄勇 陈阳[1] GAO Jiawei;FANG Jinpeng;JIANG Lizhong;HUANG Yong;CHEN Yang(School of Communication and Electronic Engineering,East China Normal University,Shanghai 200241,China;Shanghai Radio Equipment Research Institute,Shanghai 201109,China)

机构地区：[1]华东师范大学通信与电子工程学院,上海200241 [2]上海无线电设备研究所,上海201109

出　　处：《制导与引信》2024年第3期39-45,60,共8页Guidance & Fuze

基　　金：国家自然科学基金(62371191);上海航天科技创新基金(SAST2022-074)。

摘　　要：提出一种基于单比特压缩感知的光子辅助微波频谱检测方法。该方法利用受激布里渊散射效应构建与未知信号频率相关的光陷波滤波器,并将构建的光陷波滤波器作用于光频梳信号产生频谱空穴,随后利用光子辅助的随机解调器对频谱空穴位置信息进行高概率重构以实现对待测信号的频谱估计。将光子辅助的压缩感知技术应用于频谱检测,避免了对高速模数转换器的使用。此外,单比特量化的使用大幅降低了量化比特位数,减少了采样数据量,降低了后续数据的存储难度。仿真结果表明:通过控制电频梳的频率间隔,采用所提方法可以实现误差小于20 MHz的微波信号的频谱检测。A photonics-assisted microwave spectrum detection method based on one-bit compressive sensing was proposed.The proposed method constructed an optical notch filter related to the unknown signal frequency based on the stimulated Brillouin scattering effect,and then spectrum holes in the optical frequency comb signal through the optical notch filter was introduced.After that,a photonics-assisted random demodulator was used to reconstruct the position of the spectrum holes with high probability to realize the spectrum estimation of the signal under test.Since photonics-assisted compressive sensing technology is applied to spectrum detection,the use of high-speed analog-to-digital converter is avoided.Furthermore,the utilization of one-bit quantization significantly minimizes the number of quantization bits,curtails the volume of sampled data,and eases the complexity of subsequent data storage.Simulation results indicate that by controlling the frequency spacing of the electrical frequency comb,the proposed method can achieve spectrum detection of microwave signals with an error of less than 20 MHz.

关 键 词：单比特压缩感知 频谱检测 微波光子学 受激布里渊散射 

分 类 号：TN29[电子电信—物理电子学] TN98