一种宽带多波束的辐射源参数检测技术

Parameter Detection Technology of A Wideband Multi-beam Radiation Source

对宽带阵列接收的辐射源信号的参数测量技术进行了研究。针对宽带高增益系统中数字多波束形成、同时多信号处理和高灵敏度测量等要求,对每个接收通道进行短时快速傅里叶变换(FFT)处理,再对每个FFT频点进行数字波束形成,在频域和波束维度对信号进行存在搜索,将搜索后的信号二维信息(频率和波束)分别送入多个小盒进行关联,对关联后的频点进行通道数字下变频(DDC)处理和脉冲描述字(PDW)参数精测量,从而形成辐射源信号的测量结果。通过计算机仿真和实物测试,验证了整个信号处理流程的正确性。

This article studies the parameter measurement technology of radiation source signals received by wideband arrays.In response to the requirements of digital multi-beamforming,simultaneous multi-signal processing and high-sensitivity measurement in wideband high gain systems,this paper performs short-time fast Fourier transform(FFT)processing to each receiving channel is subjected,and then carries on digital beamforming on each FFT frequency point.The signal is searched for existence in the frequency domain and beam dimension,and the two-dimensional information(frequency and beam)of the searched signal is sent to multiple small boxes for correlation.The correlated frequency points are subjected to channel digital down conversion(DDC)processing and pulse descriptor word(PDW)parameter precision measurement,thereby the measurement results of the radiation source signal are formed.Through computer simulation and prototype test,the correctness of the whole signal processing process is verified.