基于量子压缩感知的宽带射频信号测量

Broadband radio frequency signal measurement based on quantum compression sensing

随着雷达、电子战和5G通信等无线射频技术的快速发展,对宽带射频信号的测量和实时频谱表征变得越来越重要.传统射频信号实时测量技术受模数转换器采样率和数字信号处理能力的限制,存在测量带宽窄、数据量大、易受电磁干扰等问题.本文提出一种基于量子压缩感知的射频信号测量技术,使用集成电光晶体作为射频传感,通过被测射频信号调制光子波函数构建压缩感知机,实现对宽带射频信号的压缩测量,显著提升了频谱感知带宽.实验演示了工频和中频高压信号的长时间频谱监测,以及高频射频信号的实时频谱测量.在傅里叶极限频谱分辨率下,实现了GHz量级的实时频谱分析带宽,数据压缩率达到1.7×10^(-5),可以满足5G无线通信、认知无线电等应用对宽带射频信号频谱测量的需求,为发展下一代宽带频谱感知技术提供了新的技术路径.

With the rapid development of radio frequency technology such as radar,electronic warfare and 5G communication,the measurement and real-time spectrum characterization of broadband radio frequency signals become increasingly important.The traditional radio frequency signal real-time measurement technology is limited by the sampling rate of analog-to-digital converter and the ability to process digital signals,and encounters the problems of narrow measurement band,large data volume,and susceptibility to electromagnetic interference.This work is to study a radio frequency signal measurement technology based on quantum compression sensing,which uses integrated electro-optical crystal as radio frequency sensor,and constructs a compression sensing machine by modulating the photon wave function of the measured radio frequency signal to realize the compression measurement of broadband radio frequency signal,significantly improving the spectrum sensing bandwidth.The experiment demonstrates the long-term spectrum monitoring of power frequency and intermediate frequency high voltage signals,and the real-time spectrum measurement of high frequency radio frequency signals.Under the Fourier limit spectrum resolution,the real-time spectrum analysis bandwidth of GHz magnitude is realized,and the data compression rate reaches 1.7×10^(-5),which can meet the needs of 5G wireless communication,cognitive radio and other applications for broadband radio frequency signal spectrum measurement,and provide a new technical path for developing the next-generation broadband spectrum sensing technology.