声光频谱分析仪对瞬变信号参数的提取算法研究

Algorithm Research on the Extraction of Transient Signal Parameter by Acousto-optical Spectrum Analyzer

声光频谱分析仪利用声光调制技术和空间傅里叶变换原理,实现高带宽信号的频谱测量。本算法通过将被测信号的空域傅里叶变换,数据按瞬态时-空关联输出并进行一定运算处理就可获取信号瞬态时频域全参数信息。仿真结果表明,信号频率还原率在99.5%以上,信号漏检率小于0.2%。

Combing the theory of acousto-optic modulation and STFT,the spectrum measurement of high bandwidth signal can be realized by acousto-optical spectrum analyzer.In this algorithm,the transient frequency domain parameters of the signal can be acquired by using the spatial Fourier transform data of the detected signal in the transient space-time correlation output and processing.The simulation results show that the frequency reduction rate is greater than 99.5%;the signal detection rate is less than 0.2%.