辐射源监测系统频谱检测窗函数选取研究

Study on the selection of spectrum detection window function of radiation source monitoring system

辐射源监测系统对工作频段的空间信号频点及带宽进行监测分析,形成有效频点数据库供系统工作时选用。而实际工程实现时,由于频谱处理不是理想的数学处理过程,会产生频谱泄漏,直接影响系统的检测性能。加窗频谱处理是抑制频谱泄漏,减小检测误差的有效手段,文章对频谱检测中窗函数的选取进行了分析研究,为辐射源监测系统频谱处理选用了合适的窗函数,并给出了不同窗函数情况下对信号频点、带宽的实际测试结果,验证了加窗处理的有效性。

The radiation source monitoring system monitors and analyzes the spatial signal frequency points and bandwidth of the working frequency band, and forms an effective frequency point database for the system to choose. However, in practical engineering, because spectrum processing is not an ideal mathematical process, spectrum leakage will occur, which directly affects the detection performance of the system. Windowed spectrum processing is an effective means to suppress spectrum leakage and reduce detection error. This paper analyzes the selection of window function in spectrum detection, selects the appropriate window function for spectrum processing of emitter monitoring system, and gives the actual test results of signal frequency and bandwidth under different window functions, which verifies the effectiveness of windowed processing.