摘要
为解决复合叠加信号的分离、高精度、高分辨率频谱分析等问题,将全相位谱分析技术应用在32位数字信号处理器(DSP)中,进行了复合信号检测与分离,提出了双通道同步采样和采样频率自适应的方法。将TMS320F28335优异的信号处理能力和强大的浮点运算能力与先进的全相位谱分析技术相结合,设计出了一台复合信号频率计。系统测试结果表明:该复合信号频率计的频率分辨率高达0.4%,频率精度达10-5级别,全相位谱分析技术具有很高的精度和良好的抑制频谱泄漏性能,开辟了频谱分析的新空间。
To solve the problems of separating the overlapping signals and conducting the high-precision and high-resolution spectrum analysis,the all-phase spectrum analysis method was used in the 32-bit digital signal processor（DSP）.After the study,an approach of dual-channel simultaneous sampling and adaptive sampling frequency was first presented.A composite signal frequency mometer was first designed by combining the excellent signal processing capability and powerful floating-point computing power of TMS320F28335 with all-phase spectrum analysis method.The system test results show that the frequency mometer＇s frequency resolution is as high as 0.4%,and the frequency accuracy level reaches 10-5.The all-phase spectrum analysis method has high accuracy and good nature of inhibiting spectrum leakage,and it opens up new space for spectrum analysis.
出处
《机电工程》
CAS
2010年第12期102-105,共4页
Journal of Mechanical & Electrical Engineering
关键词
数字频率计
数字信号处理器
全相位谱分析
采样频率自适应
digital frequency mometer
digital signal processor（DSP）
all-phase spectrum analysis
sampling-frequency self-adaption
